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EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV TC530EV

EVALUATION SYSTEM FOR TC53x A / D CONVERTERS

EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV TC530EV
EVALUATION SYSTEM FOR TC53x A / D CONVERTERS
FEATURES
GENERAL DESCRIPTION
FUNCTIONAL BLOCK DIAGRAM
TO RS232 TERMINAL
TC232 RS232 INTERFACE
Z8 MICROCONTROLLER USER PROTOTYPING AREA
TC534
4 CHANNEL DIFF. INPUT
8 DC-DC CONVERTER
3V REG.
TC530EV-2 3 / 24 / 98
1 TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.
EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
· 1 · TABLE OF CONTENTS
1 2 3 4 5 6 Table of Contents What Is Included With the TC530EV / What You Must Provide Before Getting Started Hints and Precautions Hardware Description Software Description 6.1 Data Output Format Getting Started Setup and Signal Connection Diagram TC5xx Design Software 9.1 Using the Design Software 9.2 Using the Spreadsheet Applications: How to Use TC530EV 10.1 Final Calibration of TC530EV 10.2 Getting the Most Out of TC530EV Hardware Reference 11.1 Jumper Options 11.2 Test Points 11.3 Calibration Adjustments 11.4 Bill of Materials
Appendix A: Serial Communications Appendix B: Board Schematic
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EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
· 2 · WHAT IS INCLUDED WITH TCN75EV / WHAT YOU MUST PROVIDE
The items in Table 1 should have been included when you received the TC530EV. If any of them are damaged or missing, contact TelCom Semiconductor or the distributor from which you received the kit for assistance. Certain items must be provided by the user to implement a TC530EV system. They are listed in Table 2. Table 1. TC530EV Packing List Item No.
2. Read the section What Is Included With TC530EV / What You Must Provide and assemble the necessary items. 3. Perform the steps outlined in Getting Started. 4. TC530EV should now be properly installed and operating. Consult the Applications section for more information.
· 4 · HINTS AND PRECAUTIONS
Quantity
Description
· 3 · BEFORE GETTING STARTED
We hope that everyone will be anxious to get started using TC530EV. The Getting Started section is provided to get you up and running quickly. Please complete the following steps and read the Hints and Precautions section before proceeding. This will likely avoid frustration and possible damage to TC530EV. 1. Check the contents you received against the TC530EV Packing List above. Table 2. What You Must Provide Item No.
Quantity
Description
5.0V, 50 mA regulated power supply. Host terminal or PC with RS232 interface. (See Appendix A). Cable for connecting to host above. Connecting leads, terminated in banana plugs at the TC530EV end for connecting the power supply above. Signal leads suitable for insertion into a clamp-type terminal block for connecting input stimuli to board inputs. Small flat-bladed screwdriver for adjusting POT1 / POT2 during calibration and adjustment. (Optional) Components suitable for use as integration capacitors and resistors for TC530A and TC534, if factory-supplied components are not used. (Optional) Jumpers with micro-clips to connect to TC530EV test points, etc. (Optional) Accurate voltage meter.
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EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
· 5 · HARDWARE DESCRIPTION
· 6 · SOFTWARE DESCRIPTION
· 6.1 · DATA OUTPUT FORMAT
Conversion results are sent to the host terminal as a seven-character ASCII string with the following format: Sign Character ("+" or "-") + Five Numeric Digits + Carriage Return Table 3. Microcontroller Command Set Command
Initialize Load Value Do Conversion Continuous Conversions Log Data
Command
Description
Select Channel
Display Help
Only uppercase characters are valid.
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EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
This value is calculated by the designer spreadsheet and displayed in the PERFORMANCE section. Table 4. TC530EV Data Output Format Conversion Result
Positive Positive Over-Range Positive Full Scale Positive Half-Scale Zero Negative Half-Scale Negative Full Scale Negative Over-Range
Value Returned
Value Returned +99999 +65535 +32768 +00000 or -00000 -32768 -65535 -99999
· 7 · GETTING STARTED
1. TC530EV is shipped from the factory configured as outlined in Table 6, page 9. Inspect the settings on the board to ensure they match those listed in Table 6. Ensure that switch SW1 is OFF. It may be helpful to refer to page 7, Setup & Signal Connection Diagram, while setting up TC530EV.
DB25F RX TX RESET EOC DIN DOUT DCLK R / W A0 A1
TC232
TC534
INPUT TERMINAL BLOCK CH4- 8
TC534 Differential / Single Ended Imput Select 1 CH1- 2 3 CH2- 4 5 CH3- 6 CH4- 7 8 JB4
CH3- 7 CH2- 6
RESET EOC DIN DOUT DCLK R / W A0 A1 CH4- CH3- CH2- CH1- CH4+ CH3+ CH2+ CH1+
3 JB2 4 C15 C16
CH1- 5 CH4+ 4 CH3+ 3 CH2+ 2 CH1+ 1 TB1
DC-DC CONVERTER
C11 VDD- C21
+5.0V Supply GND
SW1 ON / OFF TC55
JB1 1 2 3 +3 / 5V Select VDD+
Figure 1. TC530EV Detailed Block Diagram Showing Factory Option Settings
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EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
TC530EV-2 3 / 24 / 98
EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
· 8 · SETUP AND SIGNAL CONNECTION DIAGRAM
DB25 RS232 CONNECTOR
GND VDD+ VDD- +5V VDD+
AUX. POWER SUPPLY
LM385 VOLTAGE REFERENCE TP4 (1.0V)
+5V VDD- 2.5V
Z8 TC534
REF POT 1
TC 232
OSC IN GND +5V VDD- VDD+ 3214+ 3+ 2+ 1+
TC534 SIGNAL INPUT
AUX. POWER SUPPLY TERMINALS
TELCOM TC530EV
USER BREADBOARD AREA
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EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
· 9. 0 · TC530 / 534 DESIGN SOFTWARE
· 10.0 · FINAL CALIBRATION OF TC530EV
· 9.1 · USING THE DESIGN SOFTWARE
The TC530 / 534 Designer is an EXCEL 5.0-based spreadsheet that performs the following functions: 1. Calculates values of VREF, RINT, and CINT based upon user input. 2. Generates the initialization byte (LOAD VALUE). This byte is reported as a decimal number and must be converted to HEX by the user prior to use. 3. Generates a hardware schematic for the specified system.
· 9.2 · USING THE SPREADSHEET
1. Select the TC53xx DESIGNER spreadsheet and fill in parameters in the shaded box: - Enter the power supply voltage and the full scale input voltages as a unipolar number. For example, enter "5" if your power supply voltage is +5V. In a similar way, enter "3" if your input voltage is either + / -3V or 0 to +3V. - Use the Integration Time Guide to select an Integration time based on the approximate required converter used throughout your application. The Integration times shown maximize 50 / 60 Hz noise rejection. Note that certain values (those in BOLD type face) provide equal rejection of both 50 and 60 Hz (typically -50 dB to -65 dB). - Enter the resolution you require in the MAX COUNTS box. A 16-bit resolution equals 65536 counts. A 15-bit resolution equals 32768 counts, etc. 2. The spreadsheet automatically calculates values for RINT, CINT, VREF, crystal frequency, and initial i z a t i o n byte (LOAD VALUE). These values appear in the shaded areas of the COMPONENT VALUE block. Enter the closest standard component values in the boxes directly below each one.
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EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
buffers, gain stages, transducers, and all passive components, are corrected. Calibrating a TC53x-based system is simply a matter of adjusting the reference voltage while measuring the appropriate Reference Input. (Offset errors, as opposed to scaling or gain errors, are typically adjusted for in the input stages or through software. See below. ) To calibrate your TC53x-based system: 1. Apply a Reference Input to the system. This can be a voltage standard applied directly to the input circuitry instead of a transducer or sensor or, it can be a known stimuli applied to the sensor or transducer. In order to expose the smallest detectable scaling errors, the Reference Input should be very near full-scale. (It is difficult to calibrate a system exactly at full-scale since the system may be prone to over-ranging during the adjustment. ) 2. While applying the appropriate reference input, adjust the reference voltage so that the converter yields the correct reading. 3. After compensating for scaling errors by adjusting VREF, offset errors should be nulled-out by applying a compensating offset via software or by making a hardware adjustment such as with a "Zero Adjust" potentiometer. 4. Steps 1 - 3 may be repeated for even greater accuracy. Correcting scaling errors first and using Reference Inputs as close to full scale as possible will yield the best results with the fewest iterations.
· 10.1 · Getting the Most Out of TC530EV
The TC530EV system was designed and optimized as a development platform. This involved certain trade-offs between electrical performance and usability. The following considerations should be applied to the final system design: 1. Separate ground return paths should be used for the analog and digital circuitry. Use of ground planes and trace fill on analog circuit sections is highly recommended EXCEPT for in and around the integrator section and CREF, CAZ. ( CINT, CREF, CAZ, RINT ) Stray capacitance between these nodes and ground appears in parallel with the components themselves and can affect measurement accuracy. 2. Critical components should be chosen for stability and low noise. The use of a metal-film resistor for RINT and Polypropylene or PPS capacitors for CINT, CAZ, and CREF is highly recommended. 3. The inputs and integrator section are very high impedance nodes. Leakage to or from these critical nodes can contribute measurement error. A guard-ring should be used to protect the integrator section from stray leakage. 4. Circuit assemblies should be scrupulously clean to prevent the presence of contamination from assembly, handling, or the cleaning itself. Minutely conductive trace contaminates, easily ignored in most applications, can adversely affect the performance of high impedance circuits. The input and integrator sections should be made as compact and close to the TC53x as possible.
Table 6. TC530EV Jumper Options Jumper Block
JB1 JB2 JB3 JB4
Position
Function
Factory Setting
N / A SHORTED OPEN SHORTED OPEN SHORTED SHORTED SHORTED SHORTED OPEN SHORTED
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EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
· 11.2 · TC530EV Test Points
Table 7 describes the various test points on the TC530EV PCB.
· 11.3 · TC530EV Calibration Adjustments
A potentiometer is located on the TC530EV PCB for the purpose of calibrating the full-scale range of the TC534 as described in Table 8.
· 11.0 · HARDWARE REFERENCE · 11.1 · TC530EV Jumper Options
Table 6 details the function and factory setting of each jumper block. Table 7. TC530EV Test Points Designator
TP1 TP2 TP3 TP4 TP5 TP6
PCB Marking
+5V VDD+ VDD- REF 2.5V OSC IN
Description
External power supply input. Must be regulated 5.0V. Positive supply rail for all components except TC2332. Selectable to 3.0-5.0V via JB1. Negative supply rail for all components, derived from VDD+ TC534 charge-pump DC-toDC converter. TC534 reference voltage from POT1 wiper terminal. (Referenced to ground.) Cathode of LM385-2.5 voltage reference associated with TC534. Connected to OSC IN (Pin 22) of TC534. An oscillator signal may be injected at this point after removing X2 from its socket.
Table 8. Calibration Adjustments Designator
PCB Marking
Description
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EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
· 11.4 · BILL OF MATERIALS
Semiconductors D1, D2 LED 1 U1 U3 U4 U5 U10 Capacitors C1, C2, C5, C6 C3, C9, C10, C13, C18, C20 C4, C17, C21 C11, C19, C22 C7, C8 C14, C12 C16 Resistors R1, R2 R3 R4, R7 R6 POT 1 RP1-8 Electromechanical J1 HDR1 Jumper Post Shunt (Jumper) SW1 TB1 Test Points BP1, BP2, BP3 DB1 Socket Socket Socket Miscellaneous X1 X2
Description
Diode Red Light Emitting Diode 16-pin DIP 18-pin DIP Customed Programmed Voltage Reference, Fixed 2.5V Xistor 40-pin DIP Low E.S.R., 10 µF 50V Ceramic, .01µF 50V Tantalum, .01 µF 35V Tantalum, 1.0 µF 35V Mica, 47 pF 500V Polyphenylene, .22 µF 63V Polyphenylene, .33 µF 63V 18.2 K 1 / 8W 10.0 K 1 / 4W 1.0 K 1 / 8W 100.0 K 1 / 8W Potentiometer 25 turn, 10 K Res. Ntwk. 100K 8-Pin SIP Iso. Config. Header 0.1" Spacing Header 0.1" Spacing Header 0.1" Spacing Shorting Block DPDT Slide Switch .1 CNTRS .150 RW Terminal Block 2 POS. 300V 25AMP Clip-On Glass Bead Banana Jacks 25-Pin D-Sub Right Angle Connector 16-Pin DIP 18-Pin DIP 40-Pin DIP Crystal 8 MHz Crystal 2 MHz Hex Standoff 4-40 x 3 / 4" Hex Nut 4-40 w / Ext. Washer Hex Nut 2-56 Screw 2-56 x 3 / 4" Pn. Hd. Slttd. Breakaway Header
Part No.
1N5817RL LN28RP TC232CPE Z86E0812 LM385BCZB 2.5V TC55RP3002 TC534CPL SXE50VB10RM4X11LL C322C103K5R5CA T351G106K035AS T351A105K035AS CD15ED470J03 MKI2-.22 / 63 / 10 MKI2-.33 / 63 / 10 RN55D1822F RN55D1002F RN55D1001F RN55D1003F 3299W-1-103 4608x-102-104 4-103185-0 4-103185-0 4-103185-0 3-530153-2 EG2209 25.163.3253 151-20-100 WHT 101 745992-4 816-AG11D-ES 818-AG11D 840-AG11D-EST ECS-80-20-1 ECS-20-20-1 92700A434 90675A005 91841A003 91792A084 4-103239-0
Motorola Panasonic TelCom Zilog TelCom TelCom TelCom United Chemi-Con Kemet Kemet Kemet Cornell-Dubilier Wima Wima Dale Dale Dale Dale Bourns Bourns Amp Amp Amp Amp E-Switch Weiland Mouser H.H. Smith Amp Augat Augat Augat E.C.S. E.C.S. McMaster McMaster McMaster McMaster AMP
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EVALUATION KIT FOR TC53x A / D CONVERTERS TC530EV
APPENDIX A. TC530EV RS-232 COMMUNICATION PARAMETERS
Table 9. Connector Pin Definition Pin No.
Signal Name
Receive Data Transmit Data Request to Send Clear to Send Signal Ground
Direction
HOST TC530EV TC530EV HOST HOST TC530EV TC530EV HOST TC530EV HOST
Description
Data input to TC530EV Data output from TC530EV Not supported by current software Not supported by current software Ground reference for all signals
Table 10. TC530EV to 9-Pin PC-AT Serial Port Cable Definition TC530EV DB25F Pin No. Signal Name Direction Description
Data output from TC530EV Data input to TC530EV Not supported by current software Not supported by current software Ground reference for all signals
PC-AT DB9F Pin No.
2 Transmit Data TC530EV PC-AT 3 Receive Data PC-AT TC530EV 4 Request to Send TC530EV PC-AT 5 Clear to Send PC-AT TC530EV 7 Signal Ground TC530EV PC-AT Recommended cable: Belkin Components #F2L088-06
TC530EV-2 3 / 24 / 98
TC530EV
VDD+ +5V U1 1 C1+ +V -V 6 C7
X1 CTX082-ND + C5 10 µF
16 VCC
2 U3 5 6 XTAL1 VCC 7 XTAL2 16 17 15 9 P21 P22 P20 P32 2 O1 GND 14 TP 2.5V R4 +5V 1K U4 TC385 2 1 POT 1 1 DK TP REF C13 .01 µF R5 3 JB2 4 JB3 4 2 1 2 3 1 1 P31 P02 P01 P27 P00 P26 P24 P25 C9 .01 µF
C3 .01 µF
C4 10 µF TP VDD-
C10 .01 µF U3 1 C22 .01 µF C21 .1 µF 27 26 25 23 24 30 20 19 V-OUT 37 32 V V C C C C R D EOC R / N DIN DOUT DCLK RESET A0 A1
TP SC OSC 34
TC232
18K 18K
RIS CIS IX RX
DB1 10 µF DB25F 3 2 4 5 7 5 C2- 14 T1OUT 13 R1IN 8 R2IN 7 T2OUT R2OUT T2IN T1IN R1OUT R2 VDD+ D2 1 2 GND 15 9 10 11 12 R1
OSCOUT 21 X2 1 MHZ 22 OSCIN OSC IN 18 JB1 P23 CAP+ 38 + C11 1.0 µF
TC534
RP1-1
TC534
R3 VDD 9 5 8 39 R6 100X 4 .1 µF CL4 3 2 18 VREF+ ACOM VREF- AGND BUF CAZ CINT DIG GND
CAP- 40 CH1+ 17 CH2+ 16 CH3+ 15 CH4+ 14 CH1- 13 CH2- 12 CH3- 11 CH4- 10 CREF+ 7 CREF- 6 C12 .1 µF
100K RP1-2
1 CH1+
100K RP1-4 JB4 1 2 3 4 5 6 7 8 C15 C16 .1 µF TC5RP3002
3 CH3+
100K RP1-5
4 CH4+
5 CH1-
100K RP1-6
6 CH2-
100K RP1-7
APPENDIX B. BOARD SCHEMATIC
100K RP1-8
7 CH3-
EVALUATION KIT FOR TC53x A / D CONVERTERS
8 CH4-
R7 1K LEO1
C17 10 µF
C16 .01 µF
TP +5V
C20 .01 µF
+5V 2 3 +3V TP VDD+
TelCom Semiconductor 1300 Terra Bella Avenue P.O. Box 7267 Mountain View, CA 94039-7267 TEL: 650-968-9241 FAX: 650-967-1590 E-Mail: liter@c2smtp.telcom-semi.com
Sales Offices
TC530EV-2 3 / 24 / 98
100K RP1-3
2 CH2+
TelCom Semiconductor Austin Product Center 9101 Burnet Rd. Suite 214 Austin, TX 78758 TEL: 512-873-7100 FAX: 512-873-8236
TelCom Semiconductor H.K. Ltd. 10 Sam Chuk Street, Ground Floor San Po Kong, Kowloon Hong Kong TEL: 852-2324-0122 FAX: 852-2354-9957