TD0204-0402 VER. FS9721B Data Sheet FS9721B 2400 Counts

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TD0204-0402 VER. FS9721B Data Sheet FS9721B 2400 Counts

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TD0204-0402
VER.
FS9721B Data Sheet
FS9721B 2400 Counts Digital Multimeter
(2002.02.27)
DISPLAY
LIGHT
RANGE
DATA HOLD
Hz/Duty
PUSH BUTTON
SELECT
Temp
ROTARY SWITCHES JUMPER
mA/uA
/Cap V/Hz TERMINALS
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TD0204-0402
VER.
FS9721B Data Sheet
CONTENT
Page Description Features Measurable Modes Application Block Diagram Diagram Description Dice Layout Coordinate Technical Specification Measurement Mode Selection Keys Definition Other Functions RS232 Transmission Protocol Display Application Description Package Outline Demo Board
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Description
TD0204-0402
VER.
FS9721B Data Sheet
FS9721B high performance, power consumption, digits (2500 Counts) Analog/Digital Converter (ADC+MCU) that embedded microprocessor. contains microprocessor, noise high stability operation amplifier, conmutation operation amplifier, voltage promotion voltage regulated power source, high stability bandgap, auto measurement switch function control circuit, buzzer driver circuit, clock oscillator circuit, Backlight display control circuit, display driver circuit FS9721B embedded microprocessor that control logic function during passing I/O. Measurement functions combined differently using MEA1MEA4 pins code; through setting code build fully auto measurement meter. There Range, Select, Hold/BLCTR, Rel, Hz/Duty, RS232 Reset keys that fulfil measurement selection, functions switch, data hold, Backlight display, relative value, frequency duty cycle measurement, data transmission, reset functions through these keys. FS9721B series data output function. User connect meter computer record, analysis, process print measured data.
With regard auto power function, when there action within minutes switch keys meter, system will enter sleep mode automatically save power. process using meter, necessary power automatically, function also cancelled use.
FS9721B manufacted large intergrated circuit technology that rised hugely reliability product made design easy volume small; system takes power voltage power consumption convenient power supply battery, especially proper palm mode meter. FS9721B multi-measurement AC/DC converter that embedded microprocessor. Only less addition external components, constitute high accuracy, mult-function cost meter.
Features
2.10 2.11 2.12 Maximum Display: 2500 digits). Converter Rate: times/sec. Negative Instruction: Auto. Power Voltage Range: 2.4V3.6V. Chip Power Consumption: 6mW. Battery Warning: About Buzzer Driver Circuit (Frequency about 2.7kHz). RS232 Serial Data Output. Embedded OPAMP DC/AC switch. Function Keys: Range, Select, Hold/BLCTR, Rel, Hz/Duty, RS232, Reset. Unit Symbol Backlight Display. Auto Power-off.
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TD0204-0402
VER.
FS9721B Data Sheet
Measurable Modes
3.10 Voltage: 240.0mV, 2.400V, 24.00V, 240.0V, 1000V. Voltage: 240.0mV, 2.400V, 24.00V, 240.0V, 1000V. 240.0A/ 2400A,24.00mA/ 240.0mA,2.400A, 10.00A. 240.0A/ 2400A,24.00mA/ 240.0mA,2.400A, 10.00A. Resistance: Capacitance: Frequency: 5.000Hz, 50.00Hz, 500.0Hz, 5.000kHz, 50.00kHz, 500.0kHz, 5.000MHz Duty Cycle: 0.1%99.9%. Diode: 0V1.5 Short Circuit Testing: Sound when lower than
Application
Auto-Measurement Palm Mode Digital Multi-Function Meter. Auto-Measurement Card Digital Multi-Function Meter. Auto-Measurement Digital Multi-Function Meter. Auto-Measurement Clinch Meter (Hook Meter, Clamp Meter, etc.) Number Panel Meter.
Block Diagram
AC-to-DC Converter
Function,Range Routers,Opamps, Comparators Source
Driver
Display
Input
Signal Conditioning Network External Regulation Network
Microprocessor Voltage Double Voltage Regulator Battery Detector Bandgap Reference
Rotary Switch Push Button
Oscillator Clock Generator
BATTERY CRYSTAL
Diagram
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Block Diagram
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Diagram
TD0204-0402
VER.
FS9721B Data Sheet
SEG10
SEG11
SEG12
SEG13
SEG14
VDDA
COM1
XOUT
RLCD
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
COM2 COM3 COM4 ENTX BEEPER BLOUT REFI REFO TSTC OP1N OP1O OP2P
AGND TSTA LCDC2 LCDC1 MEA1 MEA2 MEA3 MEA4 HZ/DUTY HOLD RANGE SELECT
FS9721B
TSTB ADPC1 ADPC2
CRES1
Diagram
Package
Description
Package SYMBOL OP2N OP2O ADIP ADIN SGND CRES1 Description Negative Input DC/AC Converter Operation Amplifier Empty Output DC/AC Converter Operation Amplifier Positive Input Measurement Empty Negative Input Measurement Empty Input Current Measurement Negative Input Analog Ground Connection Extra Positive Input Voltage Division Resistance Connect Point Diode Measurement Empty High Resistance Voltage Input/ Positive Input Resistance Measurement/ Voltage Division Resistance Connect Point Diode Measurement Wave Filter Capacitance Connect Point Measuring Point Resistance Measurement Reference Voltage Negative Input Resistance Measurement
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CRES2
ONEK
TENK
OP2N
OP2O
ADIN
HUNK
SGND
ONEM
TENM
RCAP
ADIP
TD0204-0402
VER.
FS9721B Data Sheet
RCAP ONEK TENK HUNK ONEM TENM CRES2 TSTB ADPC1 ADPC2 SELECT RANGE HOLD HZ/DUTY MEA4 MEA3 MEA2 MEA1 LCDC1 LCDC2 TSTA AGND
Empty Calibrating Resistance Connect Point Capacitance Measurement Resistance 1.001k Connect Point Voltage Resistance Measurement Empty Resistance 10.010k Connect Point Voltage Resistance Measurement Empty Resistance 101.010k Connect Point Voltage Resistance Measurement Empty Resistance 1.111M Connect Point Voltage Resistance Measurement Empty Resistance 10.000M Connect Point Voltage Resistance Measurement Regulating Capacitance Connect Point Voltage Resistance Measurement Used Maximum Input Voltage 240mV/24mV Selection (See 10.4) DC/AC Selection Measurement Signal (See 10.4) Measurement Function Selection Auto/Manual Measurement Selection Relative Value Measurement Display Hold/Backlight Control Frequency/Duty Cycle Measurement Selection Capacitance Measurement Function Selection (See 10.1) Measurement Function Selection Measurement Function Selection Measurement Function Selection Measurement Function Selection Segment Symbol Control (See 10.3) Segment Symbol Control (See 10.3) Test Terminal Negative Input Power Empty Ground Connect Point Analog Signal Empty Positive Input Power Empty Empty Empty Bias Current Input Empty Negative Connect Point Charge Pump Capacitance Positive Connect Point Charge Pump Capacitance
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TD0204-0402
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FS9721B Data Sheet
VDDA RLCD XOUT SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 COM1 COM2 COM3 COM4 ENTX BEEPER BLOUT REFI REFO TSTC OP1N OP1O OP2P
Output Charge Pump Circuit Empty Output Regulated Voltage Power/ Power Source Analog Circuit Connect Point Adjust Resistance Driver Voltage Empty Oscillator Connect Point Oscillator Connect Point Empty RS232 Serial Data Output Empty Segment Segment Segment Segment Segment Segment Segment Segment Segment Segment Segment Segment Segment Segment Backplane Display Backplane Display Backplane Display Backplane Display Enable RS232 Output Beeper Driver Output Backlight Driver Output Reset Input Empty Reference Voltage Input Bandgap Reference Voltage Output Positive Output Wave Pre-filter Empty Positive Input Wave Pre-filter Negative Point Wave Pre-filter Test Negative Input Buffer Operation Amplifier Empty Output Buffer Operation Amplifier Empty Positive Input AC/DC Converter Operation Amplifier
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TD0204-0402
VER.
FS9721B Data Sheet
Dice Layout Coordinate
Substrate should connected VSS. opening: 90µm. Chip size: Diagram
78PIN Dice PadNo.
8/31
Name OP2N OP2O ADIP ADIN SGND CRES1 RCAP ONEK TENK
X[mm] 0.264 0.404 0.544 0.669 0.794 0.919 1.044 1.169 1.294 1.419 1.544 1.669 1.794 1.919 2.044
Y[mm] 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077
Name VDDA RLCD XOUT SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8
X[mm] 2.974 2.834 2.694 2.569 2.444 2.319 2.194 2.069 1.923 1.798 1.673 1.548 1.423 1.298 1.173
Y[mm] 2.495 2.495 2.495 2.495 2.495 2.495 2.495 2.495 2.495 2.495 2.495 2.495 2.495 2.495 2.495
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HUNK ONEM TENM CRES2 TSTB ADPC1 ADPC2 SELECT RANGE HOLD HZ/DUTY MEA4 MEA3 MEA2 MEA1 LCDC1 LCDC2 TSTA AGND
TD0204-0402
VER.
FS9721B Data Sheet
SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 COM1 COM2 COM3 COM4 ENTX BEEPER BLOUT REFI REFO TSTC OP1N OP1O OP2P 1.048 0.923 0.798 0.673 0.548 0.408 0.268 0.091 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.083 2.495z 2.495 2.495 2.495 2.495 2.495 2.495 2.495 2.176 2.036 1.911 1.786 1.661 1.536 1.411 1.286 1.161 1.036 0.911 0.786 0.661 0.536 0.396 0.077
2.169 2.294 2.419 2.544 2.669 2.809 2.949 3.147 3.157 3.157 3.157 3.157 3.157 3.157 3.157 3.157 3.157 3.157 3.157 3.157 3.157 3.157 3.157 3.148
0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.077 0.396 0.536 0.661 0.786 0.911 1.036 1.161 1.286 1.411 1.536 1.661 1.786 1.911 2.036 2.176 2.495
Technical Specification (VDD=3V, Ta=25)
Symbol AGND VDDA VBAND REFI VBATT Parameter Recommend Operation Power Voltage Supply Current Power Supply Current Digital Input High Voltage Digital Input Voltage Pull Current Analog Ground Voltage Test Condition Mode Power VDD-0.5 Vin=0
VDD/2
VDD/2
Units ppm/V
VDD/2 1.25 0.44
Analog Power Build Reference Voltage Relative AGND Build Reference Voltage VDD=2.4~3.6 Output Voltage Coefficient Recommend Reference input Relative AGND Voltage Battery Detector Voltage
9/31
-2000
+2000
2.25
2.55
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FLCD VLCD FBEEP FRS232 IRSOUT
TD0204-0402
VER.
FS9721B Data Sheet
2400 0.000 Counts Counts Counts Counts 500k -600 5%+25 2%+10 0.5%+3 1%+2 1.5%+2
Frame Frequency Pk-Pk Driver Voltage Beeper Frequency RS232 Baud Rate RS232 Output High Current Zero Input Reading Linearity (Max. Deviation From Best Straight Line Measurement Bandwidth Error
VOH=2V ADPxl Input=0V ADPxl Input,Full Scale 240.0mV ADPxl Input240mVrms 20Hz~1kHz
-0.001
0.001
VFREA
FMAXA VFRED
FMAXD
Continuity Check Value Measurement Display Count Autorange Counts Autorange Down Counts Frequency Counter Input VIL(Relative Level (Hz/Duty Control) AGND) VIH(Relative AGND) Frequency Counter Input Vpp= 100mV frequency (Hz/Duty Control) Square Wave Input Duty Measurement Pulse Vpp= 100mV Width Error (Hz/Duty Square Wave Input Control) Frequency Counter Input VIL(Relative Level (MEAS=0101) AGND) VIH(Relative AGND) Frequency Counter Input Vpp= 600mV Level (MEAS=0101) Square Wave Input Duty Measurement Pulse Vpp= 600mV Width Error(MEAS=0101) Square Wave Input Capacitor Measurement 2.500nF Mode Accuracy after Zero Input 25.00 Mode Relative 250.0 Mode Adjust 250.0nF Mode 2.500 Mode 25.00 Mode
2500 2400
Counts Counts Counts Counts Counts
duty cycle measurement, have input square waves. main error measurement error pulse width that comparator resolve. Suppose error 100ns input frequency 100KHz. divide square wave into 1000 segments (1000 counts), thus each count takes Therefore maximum error Duty Cycle measurement (100ns/10ns)=10 Counts. duty cycle signal measured 50.0%±1.0%. signal measured duty cycle more than less than measurement will display 0.00%.
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TD0204-0402
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FS9721B Data Sheet
Measurement Mode Selection
10.1 Measurement Mode Selection (MEA1MEA4 empty, connect VSS)
Measurement Function Select Function Switch DCV/ACV DCV/ACV Switch CAP=1: Ohm/Diode/Cont. Switch CAP=0: Ohm/Diode/Cont./C Switch V/Hz/Duty Switch V/Hz/Duty Switch mV/Hz/Duty/ Switch A/Hz/Duty Switch mA/Hz/Duty Switch A/Hz/Duty Switch Hz/Duty Switch Hz/Duty Hz/Duty Voltage Switch Hold Range Select Jump
Ohm/Diode/ Continuity /Cap. Mode DCmV Hz/Duty DCA/ACA Switch DCmA/ACmA Switch DCA/AcA Switch
Input from Please Refer Form 10.2 Input from
Note: Jump column means measurement function open circuit diagram that common used diagram Auto mode, ACmv Measurement mode selected only when Range pressed. This mode uses path input measure Hz/Duty. auto-range 240.0mV/24.00mV, display 2400 240.0, respectively.
10.2 Determination Input Self-defined Symbol Decimal Location (MEA1MEA4 empty, connect VSS)
MEA4 MEA3 MEA2 Range Input Voltage ±240mV Input Channel Decimal Location 2400 240.0 24.00 2.400 Symbol Location Symbol
LCDC1 LCDC2
Technical Service
User-Defined
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TD0204-0402
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FS9721B Data Sheet
10.3 Combination LCDC1 LCD2 Determine Self-defined Symbol Location (LCDC1 LCDC2 empty, connect VSS) LCDC1 LCDC2 Symbol Location Description COM1, SEG14 User Defines Symbol COM2, SEG14 COM3, SEG14 COM4, SEG14 10.4 Function ADPC1 ADPC2 Input (ADPC1 ADPC2 empty, connect VSS) ADPC1 ADPC2 DC/AC Status
Maximum Input Voltage 240mV 24mV
Keys Definition
11.1 Range (Auto/Manual Measurement Switch) Range switch Auto/Manual Measurement acts activation. default Auto Measurement when power press time, system will switch Manual Measurement. Manual Measurement mode, system will jump range when pressed time. continue press range, system will jump lowest range, recircle orderly. press hold over seconds, system will switch Auto Measurement mode. Hz/Duty Cycle cannot measured Manual Measurement. 11.2 Hold/BLCTR (Display Hold/Backlight Control) Hold/BLCTR control Display Hold/Backlight acts activation. functions are: hold display data/Backlight control. When pressed, display data will locked keep unchanged; press again, system will unlocked enter normal measurement mode. When press hold over seconds will enable Backlight. 11.3 (Relative Value Measurement) measure Relative Value acts activation. controls measure Relative Value except Hz/Duty, Diode Continuity functions. 11.4 Select (Function Switch) Select select functions acts activation. select function measure. 11.5 RS232 (Series Output Control) RS232 control Series Output acts lock mode. When close, displays RS232 symbol that means meter data transmission status transmit data outside; when open, system will secede data transmission will stop. 11.6 Hz/Duty(Frequency/Duty Cycle) Hz/Duty select Frequency/Duty Cycle acts activation. Frequency Measurement Mode, press select Duty Measurement; AC/DC Mode, press select Voltage /Hz/Duty Current/Hz/Duty Measurement Mode.
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FS9721B Data Sheet
11.7 Reset (Reset Key) Reset reset system acts activation. Press reset microprocessor.
Other Functions
12.1 Auto Power-off process measurement, action operated minutes function keys function switch, meter will Auto (Standby Mode). Auto Power-Off status, function keys pressed function switch activated, meter will Auto (Working Mode). press hold Select power Auto Power-On function will disabled. RS232 working status, Auto Power-On function will disabled. 12.2 12.3 Buzzer short testing, resistance lower than beeper will sound.
12.4 Backlight system Backlight driver output function control Backlight circuit open provide convenience reading value when light poor vision. When press Hold/BLCTR over seconds, Backlight will open; when press again over seconds, Backlight will close. 12.5 Series Data Output system series data output function. When meter connect equipment with series data interface (RS232) such computer, output measured data (including symbols) convenience record, analysis, process print measured result.
RS232 Transmission Protocol
Direction: One-way computer. Series Transmission Rate: 2400 Data Bit: bit. Even Calibration: None Data Decimal: Data Length: Bytes. Data Information: table on-off information. Data Format: byte seg1, bits represent data table) byte seg2, bits represent data table) byte seg3, bits represent data table) bit, bit, 13.9 means: Bit3Bit segn (COM4COM1) 13.10 Sampling Rate: 40KHz 13.11 Output Frequency: 40Hz 13.12 Output Frequency after Average: 10Hz 13.13 Output Frequency after Auto-Zero:
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13.1 13.2 13.3 13.4 13.5 13.6 13.7 13.8
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TD0204-0402
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FS9721B Data Sheet
Display FS9721B/Q100(C2=LCDC2, C1=LCDC1)
Notes: Working Voltage: Drive Method: Duty, Bias. Diagram Display Structure
Diagram
Display Drive Wave
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TD0204-0402
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FS9721B Data Sheet
Application Description
Common Circuit Diagram A100 Package
BUZZER RS233 BLOUT ADP2 XTAL 200k 10uF 10uF 10uF 0.1uF 10uF HZ/DUTY RANGE SELECT 27nF 4.7uF HOLD 174k 10uF
BATTERY
100k
10nF
VR10k 500k 27nF
28.5k
VR2k
101.01k
1.111M
100k
900k
100k
1N914
1N914 100k
DCmV Diode
DCV/ACV
Ohm/Cap/Diode 10uF 100k
100k 27nF 27nF
0.99 0.01
uA/mA
V/Ohm/Diode/Cap
VDDA AGND
Battery Negative Terminal Negative Power Input Battery Positive Terminal Positive Power Input Charge Pump voltage about 2*VDD Analog Power about 3.9V Analog Common about VDD/2
Diagram
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Common Circuit Diagram
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0.47uF
57.4k
0.47uF
OP2N N.C. OP2O ADIP N.C. ADIN N.C. SGND N.C. CRES1 N.C. RCAP ONEK N.C. TENK N.C. HUNK N.C. ONEM N.C. TENM CRES2 TSTB ADPC1 ADPC2
COM2 COM3 COM4 ENTX BEEPER BLOUT N.C. REFI REFO N.C. TSTC OP1N N.C. OP1O N.C. OP2P
COM1 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 N.C. N.C. XOUT N.C. RLCD VDDA N.C. N.C. N.C. FS9721B
RESET
N.C. N.C. N.C. AGND N.C. TSTA LCDC2 LCDC1 MEA1 MEA2 MEA3 MEA4 HZ/DUTY HOLD RANGE SELECT
47nF
Dice
TD0204-0402
VER.
FS9721B Data Sheet
XTAL 200k 10uF 10uF 10uF 0.1uF 10uF 174k 10uF
100k RESET
BATTERY
SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 XOUT RLCD VDDA
BUZZER 10nF RS232 BLOUT 500k ADP2 27nF
HZ/DUTY HOLD RANGE SELECT
VR10k
28.5k VR2k
4.7uF
27nF
OP2N OP2O ADIP ADIN SGND CRES1 RCAP ONEK TENK HUNK ONEM TENM CRES2 TSTB ADPC1 ADPC2
COM1 COM2 COM3 COM4 ENTX BEEPER BLOUT REFI REFO TSTC OP1N OP1O OP2P
FS9721B
AGND TSTA LCDC2 LCDC1 MEA1 MEA2 MEA3 MEA4 HZ/DUTY HOLD RANGE SELECT
100k
0.47uF
0.47uF
47nF
57.4k
101.01k
1N914
1N914 100k 100k 27nF 27nF 0.01 0.99
DCmV Diode
DCV/ACV
1.111M
900k
100k
Ohm/Cap/Diode 10uF 100k
uA/mA
V/Ohm/Diode/Cap
VDDA AGND
Battery Negative Terminal Negative Power Input Battery Positive Terminal Positive Power Input Charge Pump voltage about 2*VDD Analog Power about 3.9V Analog Common about VDD/2
Diagram
Common Circuit Diagram
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15.2
TD0204-0402
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FS9721B Data Sheet
FS9721B Technical Pointer Components Relationship
Network R25/(R26+R25)=1/10 R24/(R26+R24)=1/100 R23/(R26+R23)=1/1000 R22/(R26+R22)=1/10000 Current (R9:R7=9:1 Measurement (R13+VR2,R12=R14) Voltage Reference (R8,R6,VR1
240mV 2.4V 240V 1000V 240mV
R25/(R26+R25)=1/10, R9:R7=9:1 AC2.4V R25/(R26+R25)=1/10 R24/(R26+R24)=1/100 240V R23/(R26+R23)=1/1000 1000V R22/(R26+R22)=1/10000 R26//R22=1k 2.4k R26//R22=1k R26//R23=10k 240k R26//R24=100k 2.4M R26//R25=1M R26=10M 240A R17+R16+R28=100 2400 R17+R16+R28=100 24mA R16+R28=1 240mA R16+R28=1 R28=0.01 240A R17+R16+R28=100 2400 R17+R16+R28=100 24mA R16+R28=1 240mA R16+R28=1 R28=0.01 Diode
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15.3
Note:
TD0204-0402
VER.
FS9721B Data Sheet
FS9721B (Diagram Diagram Components List
SPEC. 100k 200k 100k SPEC. 28.5k 100k 9.99 100k 900k 100k SPEC. 1.111M 10.000M 0.01 100k SPEC. 10nF 27nF 0.47F 27nF 0.47F 4.7F 27nF XTAL SPEC. 1N914 1N914
DioS DioR 4MHz FS9721 57.4k 27nF 1.001k 500k 47nF Battery 10.010k 100k Buzzer 101.010k 0.1F technical instructions such accuracy, duty press-proof resistance capacitance components marked common circuitry components list, they depends actual needs when designing products.
VDDA RLCD REFO 2*VDD 3.9V 1.5V 1.5V 1.2V 0.4V REFI AGND
15.4 Power System
REFI 200k REFO RLCD VDDA 10uF 0.1uF 10uF 10uF 10uF 10uF 174k
FS9721B
Diagram
Relative Voltage Each Point
AGND
FS9721B
bias current input point increase will reduce current consumption shortage bias current will affect input range measurement. AGND analog ground connection. value equal middle point battery voltage. point value generated cannot connect middle point battery. bypath capacitance, also make AGND regulated VSS. power pump capacitance. makes voltage pass charge/discharge rise being about double voltage VDD.
Diagram
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Power Circuit
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FS9721B Data Sheet
VDDA output voltage after regulation about 3.9V that relative VSS. REFO bandgap power source about 1.2V that relative AGND 100ppm/ stability.
10uF
15.5 Power Supply Circuit
different applications user make different power supply methods. some measurements, sensor requires higher voltage such OPAMP, Hale components that difficult supply power then take some power supply methods below.
10uF
AGND
FS9721B
Power Supply
Diagram
10uF 10uF
4.5~9V
DC-TO-DC 10uF AGND 10uF
AGND
10uF
FS9721B
Diagram Power Supply
FS9721B
Diagram
4.5V9V Power Supply
10uF
6V~12V
2V~2.4V AGND
4.5V
10uF
AGND
2V~2.4V
10uF
10uF
FS9721B
FS9721B
4.5V Power Supply
Diagram
6V12V Power Supply
Diagram
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1N4148 1N4148
TD0204-0402
VER.
FS9721B Data Sheet
15.7 Activated Reset Circuit
10uF 9V~12V 10uF
AGND
100K RESET 10nF
FS9721B
NJM79L03A
FS9721B
Diagram
9V12V Power Supply
15.6 Basic Power Source
Diagram Reset Circuit
15.8 Crystal Oscillator Circuit
REFI
REFO
XOUT
FS9721B
XTAL
Diagram
Utility Internal Basic Power Source
FS9721B
Diagram
REFI
Crystal Oscillator Circuit
ICL8069A
diagram, provides statical working point revisor; tiny adjustment frequency; temperature compensation. less requirements situation, unused.
FS9721B
Diagram
Utility External Basic Power Source
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FS9721B Data Sheet
15.10 Mode Switch Function Control Circuit
15.9 Buzzer Driver Circuit
BUZZER
BEEPER FS9721B
Diagram Resistance Beeper Connection
Diagram Mode Switch Function Control Circuit
BUZZER
BEEPER FS9721B
Diagram
High Resistance Beeper Connection
andS10 Lock switch. function S3S4, please refer 10.3. function S15S16, please refer 10.4. function S13, please refer 10.1. selection doing capacitance measurement when same mode Ohm/Diode/Continuity/Cap., please refer 10.1. control switch RS232 output. S5S9 function selection switch activation. their functions, please refer Keys Other actual application, utility switch keys should taken according real situation.
15.11 Commutation Circuit
Diagram average commutation circuit diagram FS9711B. circuit, signals enter through R26, then process voltage division through R26, R25, R24, R22. divided signals from OP1O enter through ADIP ADIN after commutation. adjust voltage signals calibration measurement. 240mV mode amplified times through Diagram peak commutation circuit diagram. Diagram true validity commutation circuit diagram, user determine self according need select which commutation circuit.
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FS9721B Data Sheet
100k
100k 27nF
0.47uF 0.47uF VR2k 28.5k 4.7uF
27nF
ADIP
ADIN OP2O
OP2N
OP1O
OP1N
FS9721B
Digit Part
Diagram
100k 27nF
Average Commutation Circuit Diagram
28.5k
4.7uF
ADIP
ADIN
OP2O
OP2N
OP2P
OP1O
OP1N
FS9721B
Digit Part
Diagram
Peak Commutation Circuit
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FS9721B Data Sheet
OP1O
10uF
AD737
Full Wave Rectigier
ADIP
Input Ampcifier
0.1uF
Bias Section
core
100k
ADIN
33uF
FS9721B
Diagram
True Validity Commutation Circuit Voltage Division Voltage Measurement Diagram below:
Vin=1V Vout=0.1V 1.111M Vin=10V Vout=0.1V 101.01k Vin=100V Vout=0.1V Vin=1000V Vout=0.1V
15.12 Voltage Measurement
R620k R2610M 1.111M ONEM R24101.01k HUNK TENK ONEK REFI REFO TENM
SGND
FS9721B
Diagram
Voltage Division Circuit Diagram
Diagram
Voltage Measurement
When doing voltage measurement, measuring voltage input from resistance R26, DCmV divided, enter directly; 2.4V, 24V, 240V, 1000V mode divided R25, R24, R23, gain 1/10, 1/100, 1/1000, 1/10000 voltage, then enter adjust resistance value calibration measurement.
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formula voltage division Vout=Vin [Rs/ (R26+Rs R25, R24, Therefore, accuracy R22, R23, R24, determine accuracy measurement. AcmV enter through divided 1/10 voltage, then amplified times internal fulfill measurement, accuracy also determine measuring accuracy ACmV.
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FS9721B Data Sheet
15.13 Current Measurement
uA/mA 0.5A/250V 0.99 10A/250V AGND 0.01 SGND
FS9721B
Diagram
Current Measurement
When doing current measurement, current signals enter through R31. sampling resistance mode (R16+R17+R28), sampling resistance mode (R16+R28) sampling resistance mode R28. They measured respectivly through mode switch. When measuring open close; when measuring open close; large current enters through port. maximum reduced voltage modes 0.24V. These voltages input voltage comparator compare. voltage smaller than 24mV, will sent times amplifier amplify, then sent converter; voltage larger than 24mV, system will work auto-ranging signal, jump mode under control microprocessor send current signal directly converter.
Resistance measurement refers standard resistance, then takes comparison between measuring resistance standard resistance measuring resistance value. standard resistance mode (R26). standard resistance other modes parallel respectively R25, R24, R23, 100k, 10k, resistance. When doing resistance measurement, internal will generate 0.4V voltage (relative AGND), voltage output respectively measuring resistance through resistance R25, R24, R23, proceed measurement comarison. connects negative through standard resistance voltage reference. mode switch. When doing resistance measurement, close. wave filter capacitance measuring point resistance measurement.
15.15 Diode Test
Diode
900K 100K
TENM
FS9721B ONEK SGND
15.14 Resistance Measurement
1.111M 101.01K 100k 900k 27nF
Diagram
Diode Measurement
TENM ONEM HUNK TENK ONEK CRES1FS9721B SGND
Diode test generate 1.5V voltage from internal output through R22, then positive diode through PTC. positive voltage reduction generated diode about 0.5V-0.7V. divided R19, 1/10 then amplified times internal display value. mode switch. When doing diode measurement, close.
AGND
Diagram Resistance Measurement
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FS9721B Data Sheet
15.16 Short Circuit Testing
Continuity
900k
TENM
FS9721B ONEK SGND
AGND
Diagram
Short Circuit Testing
Capacitance measurement charge/discharge measuring capacitance through form oscillation, then calculate cycle oscillation capacitance value. adjust calibrate value capacitance measurement. mode switch. When doing capitance measurement, close. actual application, linearity worse when doing 2.5nF measurement, take consideration paralleling proximate 1000pF capacitance input capacitance measurement during design. When doing measurement, press make value zero before measuring. linearity smaller measurement capacitance mode will better.)
Short circuit testing proceeded resistance mode. 0.4V voltage (relative AGND) generated internal output through R22, then short measuring point through PTC. mode switch close during doing short circuit testing. gets voltage VRx, input through R19. smaller than beeper will sound.
15.18 Frequency Measurement
100k
15.17 Capacitance Measurement
10uF
FS9721B SGND
57.4k 900k
RCAP
3/4VDD 1/4VDD DODO+
DODO+
AGND
Diagram
Frequency Measurement
SGNDFS9721B
Typical Wave Input
3/4VDD 1/4VDD
Diagram
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Capacitance Measurement
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FS9721B Data Sheet
Package Outline
Diagram
Package Outline
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Demo Board
17.1
TD0204-0402
VER.
FS9721B Data Sheet
Demo Board Schematic
port1 DB9M RSO1 DioS RS232 ENABLE DIP-2 BUZZER COM2 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 10uF 200K 10uF 10uF 100k 0.1uF 10uF
DioR
ENTX
SW-SPDT BATTERY 10uF
COM1 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 N.C. N.C. XOUT N.C. RLCD VDDA N.C. N.C. N.C.
10uF
COM3 COM4 COM5 ENTX BLOUT 100K 10nF VREF 500K VR10K ADP2 27nF GAIN VR2K TEMP GAIN Temp1 28.5K Temp2
OP2N N.C. OP2O ADIP N.C. ADIN N.C. SGND N.C. CRES1 N.C. RCAP ONEK N.C. TENK N.C. HUNK N.C. ONEM N.C. TENM CRES2 TSTB ADPC1 ADPC2
COM2 COM3 COM4 ENTX BEEPER BLOUT N.C. REFI REFO N.C. TSTC OPIN N.C. OP1O N.C. OP2P
FS9721B/Q100
N.C. N.C. N.C. AGND N.C. TSTA LCDC2 LCDC1 MEA1 MEA2 MEA3 MEA4 HOLD HZ/DUTY RANGE SELECT
TSTB1 DIP-8 SW-PB SW-PB SW-PB SW-PB SW-PB DIP-2 HZ/DUTY HOLD RANGE SELECT
FS9711G/I 27nF
BLCTR
0.47uF
0.47uF
1N914
1N914
47nF SELECT
GAIN VR30K
101.0K
JMP1 100K
1.111M
100K
TSTB SW-PB
100K
100K 27nF ADP2 ADP/ADP1 Input Input ADP2 Input COM1
27nF
900K
DCV/ACV
10uF
OHM/CAP/DIODE DCmV/OHM/CAP/Diode
Title ADP2 V/OHM/Diode/CAP Size Letter Date: File: 26-Feb-2002 Sheet Drawn Number
FS9721 DESIGN
Revision
Diagram Demo Board Schematic
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FS9721B Data Sheet
Demo Board Location
RS232 PORT
FS9721_LP3 FS9721_LP1 FS9721B/Q100 MODULE
DIP-2
Power RS232 ON/OFF (LP3 Q100 Use)
Temp1 Temp2 Temp Gain
FS9721_LP1 FS9721_LP3 FS9721B/Q100
TSTB LCDC2 LCDC1 MEA1 MEA2 MEA3 MEA4
Hz/duty Hold Range Select BL_CTR
Vref
Gain
ADPC1 ADPC2
Gain
Input Input ADP2 Input JMP1
DIP-2
Diagram Demo Board Location
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V/Diode/OHM/CAP
DCmV/OHM/CAP/Diode DCV/ACV DCmV/OHM/CAP/Diode
ADP/ADP1
ADP2
COM1
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DIP-8
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FS9721B Data Sheet
17.2.1 17.2.2 17.2.3 17.2.4 17.2.5 17.2.6 17.2.7
Input Voltage, Resistance, Diode Capacitance. Analog Signal Ground. Input Voltage (mV), Duty Cycle. Current Mode Measuring Terminal. (Input Voltage) J1~J10: Please refer FS9721B/Q100 Measurement Mode Jumper S1~S6: Please refer FS9721B/Q100 Demo Board SW-DIP8: switch Level)
MEA4
Function mode (MEAS 1101) Diode Short current Test Diode Short current Test
MEA3
MEA2
MEA1
Function mode
AC/DC Voltage (including mode)
Resistance/Diode Short Test/Capacitance Voltage mode) Voltage mode Capacitance Mode Hz/Duty
LCDC1 LCDC2 control symbol. shows below demo board:
LCDC1 LCDC2 Symbol
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17.2.8
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FS9721B Data Sheet
SW2-DIP2: switch Level) ADPC1 Function mode (MEAS Input (25m~250mV) Input (2mV~25mV) ADPC2 Function mode (MEAS measurement measurement
17.2.9
SW3-DIP2: switch Level) Pin2 care Function RS232 mode RS232 mode
17.3
FS9721B/Q100 Measurement Mode Select:
MEA4 MEA3 MEA2 MEA1 Mode AC/DC Voltage (including mode) Select Hz/duty AC/DC Switch Hz/Duty/Voltage Switch Hz/Duty/Voltage Switch
Resistance/Capacitance/Diode/ CAP=1: Short Circuit Test Resistance/Diode/Short Circuit Test Switch
CAP=0: Hz/Duty/Voltage Switch Resistance/Diode/Short Circuit Test/Capacitance Switch Voltage voltage mode) Voltage mode Capacitance Mode Hz/Duty Cycle AC/DC Switch AC/DC Switch AC/DC Switch Hz/Duty Hz/Duty/Voltage Switch Hz/Duty/Voltage Switch Hz/Duty/Current Switch Hz/Duty/ Current Switch Hz/Duty/Voltage Switch
Duty Cycle measurements take measuring path input terminal. single positive input point. range measuring voltage ±200mV. decimal location decided means decimal, means 20.00, means 200.0 means 2.000 that display with unit. 200.0mV/20.00mV autoranging display respectively 2000 200.0.
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17.4
TD0204-0402
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FS9721B Data Sheet
FS9721B/Q100 Measurement Mode Jumper Setup:
MEA4 MEA3 MEA2 MEA1 Mode Jumper AC/DC Voltage (including mode) Resistance/Capacitance/Diode/S J1,J3 hort Circuit Test Voltage voltage mode) Voltage mode Capacitance Mode Duty Cycle J1,J3 J1,J3 Input V/Diode/OHM/CAP, V/Diode/OHM/CAP, V/Diode/OHM/CAP, V/Diode/OHM/CAP, V/Diode/OHM/CAP,
ADP2, ADP2, ADP2,
V/Diode/OHM/CAP, V/Diode/OHM/CAP, ADP/ADP1, ADP/ADP1,
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TD0204-0402 VER. FS9721B Data Sheet FS9721B 2400 Counts

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