MICROPROCESSOR-COMPATIBLE 8-BIT 7820RP VREF VREF VREF(+

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MICROPROCESSOR-COMPATIBLE 8-BIT 7820RP VREF VREF VREF(+

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SPACE PRODUCTS
MICROPROCESSOR-COMPATIBLE 8-BIT
7820RP
VREF VREF
VREF(+) VREF(-)
4-BIT FLASH (4MSB)
WR/RDY 7820RP
MODE
4-BIT
THREE STATE DRIVERS
DB0-DB7 DATA PINS 2-5, 14-17
VREF(+)
4-BIT FLASH (4MSB)
Memory
TIMING CONTROLCIRCUITRY
MODE
WR/RDY
FEATURES:
1.36uS Conversion Time Built-in Track-and-Hold Function Missing Codes Single Volt Supply External Clock Tri-State Output Buffered Total Ionization Dose Enhanced 100krads (Si) Dependent Orbit Single Event Effects
DESCRIPTION:
7820RP microprocessor compatible 8-Bit Analog-to-Digital Converter with input supply range with single Volt supply. 7820RP incorporates internal sample-and-hold circuitry which eliminates need external signals with slew rates less than 100mV/uS. 7820RP designed easily interfaced with microprocessors appearing memory location port without need external interfacing. outputs latched, tri-state buffered.
0310.00Rev1
data sheets subject change without notice
(858) 452-4167 Fax: (858) 452-5499 www.spaceelectronics.com
©2000 Space Electronics Inc. rights reserved.
7820RP
MICROPROCESSOR-COMPATIBLE 8-BIT
TABLE 7820RP ABSOLUTE MAXIMUM RATINGS
PARAMETER Digital Input Voltage (Pins 6-80, Digital Output Voltage (Pins 2-5, 14-18) VREF(+) VREF(-) Operating Temperature Storage Temperature Range Power Dissipation 75°C Derates above +75°C
-0.3 -0.3 VREF(-) -0.3
VDD+0.3 VDD+0.3 VDD+0.3 VREF(+) VDD+0.3 +125 +150
UNITS mW/°C
CAUTION: (electrostatic discharge) sensitive device. digital control inputs diode protected; however, permanent damage occur unconnected devices subject high energy electrostatic fields. Unused devices must stored conductive foam shunts. protective foam should discharged destination socket before devices inserted.
Memory
TABLE 7820RP CHARACTERISTICS
PARAMETER ACCURACY Resolution Total Unadjusted Error Minimum Resolution which Missing Codes guaranteed REFERENCE INPUT Input Resistance VREF(+) Input voltage Range VREF(-) Input voltage Range ANALOG INPUT Input Voltage Range Input Leakage Current Input Capacitance LOGIC INPUTS VINH VINH
0310.00Rev1
TEST CONDITIONS
UNITS
±1/2
Bits Bits
VREF(-)
VREF(+) VREF(+)
VREF(-)
data sheets subject change without notice
©2000 Space Electronics Inc. rights reserved.
7820RP
PARAMETER IINH(CS, IINH(WR) IINL(WR) Input Capacitance MODE VINH VINH IINH IINL Input Capacitance LOGIC OUTPUTS DB0-DB7, OFL, IOUT(DB0-DB7) Output Capacitance IOUT Output Capacitance SLEW RATE, TRACKING POWER SUPPLY Power Dissipation Power Supply Sensitivity Total unadjusted error includes offset, full scale linearity error. tested. specified performance ISINK 2.6mA Floating State Leakage ISOURCE 360µA ISINK 1.6mA Floating State Leakage TEST CONDITIONS
MICROPROCESSOR-COMPATIBLE 8-BIT
TABLE 7820RP CHARACTERISTICS
UNITS
Memory
V/µs
±1/16
±1/4
0310.00Rev1
data sheets subject change without notice
©2000 Space Electronics Inc. rights reserved.
7820RP
MICROPROCESSOR-COMPATIBLE 8-BIT
TABLE 7820RP CHARACTERISTICS
PARAMETER RD/WR Setup Time RDWR Hold Time Delay Time (Pull-up Resistor Conversion Time Mode) Data Access time Mode) delay Mode) Data Hold Time Delay time between Conversions Write Pulse Width Delay Time between Pulses Data Access Time (WR-RD Mode) Delay Delay Data Access Time (WR-RD Mode) Delay (Stand-alone Operation) Data Access time after (Stand-alone Operation)
SYMBOL tCSS tCSH tRDY tCRD tACC0 tINTH tACC1 tINTL tACC2 tIHWR
tCRD 1700
UNITS
Memory
TABLE 7820RP DESCRIPTION
NUMBER
0310.00Rev1
NAME WR/RDY Mode VREF(-) VREF(+)
FUNCTION Analog Input, Range: VREF(-) VREF(+). Data Output. Three State Output, (LSB). Data Output. Three State Output, Data Output. Three State Output, Data Output. Three State Output, WRITE control input/READY status output. Mode Selection Input. determines whether device operates WR-RD mode. internally tied through 50µA current source. READ Input. must access data from part. INTERRUPT Output. going indicates that conversion complete. Ground. Lower limit reference span. Range: GNDVREF(-)VREF(+). Upper limit reference span. Range: VREF(-)VREF(+)VDD. Chip Select Input. decoded device address, must recognized converter.
data sheets subject change without notice
©2000 Space Electronics Inc. rights reserved.
7820RP
NUMBER NAME FUNCTION Data Output. Three State Output, Data Output. Three State Output, Data Output. Three State Output, Data Output. Three State Output,
MICROPROCESSOR-COMPATIBLE 8-BIT
TABLE 7820RP DESCRIPTION
Overflow Output. analog input higher than (VREF(+)-1/2LSB, will conversion. three state output which used cascade more devices increase resolution. connected. Power supply voltage,
TEST CIRCUITS FIGURE LOAD CIRCUITS DATA ACCESS TIME TEST
FIGURE LOAD CIRCUITS DATA HOLD TIME TEST
100pF DGND High-Z
10pF
Memory
DGND High-Z
100pF DGND High-Z
10pF DGND High-Z
0310.00Rev1
data sheets subject change without notice
©2000 Space Electronics Inc. rights reserved.
7820RP
MICROPROCESSOR-COMPATIBLE 8-BIT
7820RP TYPICAL PERFORMANCE CHARACTERISTICS
Memory
0310.00Rev1
data sheets subject change without notice
©2000 Space Electronics Inc. rights reserved.
7820RP
FIGURE OPERATING SEQUENCE (WR-RD MODE)
MICROPROCESSOR-COMPATIBLE 8-BIT
FIGURE MODE
FIGURE WR-RD MODE (tRD>tINTL)
FIGURE WR-RD MODE (tRD<tINTL)
Memory
FIGURE WR-RD MODE STAND-ALONE OPERATION (CS=RD=0)
0310.00Rev1
data sheets subject change without notice
©2000 Space Electronics Inc. rights reserved.
7820RP
FIGURE POWER SUPPLY REFERENCE
VIN(+) VIN(-) 0.1µF 47µF
MICROPROCESSOR-COMPATIBLE 8-BIT
FIGURE INPUT REFERENCED
VIN(+)
7820RP
0.1µF 47µF 2.5V VIN(-)
7820RP
VREF(+) VREF(-)
VREF(+) VREF(-)
FIGURE EQUIVALENT INPUT CIRCUIT
12pF LADDER
FIGURE NETWORK MODEL
12pF
32pF
Memory
COMPARATORS
LADDER
COMPARATORS
0310.00Rev1
data sheets subject change without notice
©2000 Space Electronics Inc. rights reserved.
7820RP
MICROPROCESSOR-COMPATIBLE 8-BIT
Memory
0310.00Rev1
data sheets subject change without notice
©2000 Space Electronics Inc. rights reserved.

MICROPROCESSOR-COMPATIBLE 8-BIT 7820RP VREF VREF VREF(+

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