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ADC08031 ADC08032 ADC08034 ADC08038 8-Bit High-Speed Serial I O A D Converters with Multiplexer Options Voltage Reference and Track Hold Function

January 1995

ADC08031 ADC08032 ADC08034 ADC08038 8-Bit High-Speed Serial I O A D Converters with Multiplexer Options Voltage Reference and Track Hold Function
General Description
The ADC08031 ADC08032 ADC08034 ADC08038 are 8-bit successiveapproximation A D converters with serial I O and configurable input multiplexers with up to 8 channels The serial I O is configured to comply with the NSC MICROWIRETM serial data exchange standard for easy interface to the COPSTM family of controllers and can easily interface with standard shift registers or microprocessors The ADC08034 and ADC08038 provide a 2 6V band-gap derived reference For devicesoffering guaranteed voltage reference performance over temperature see ADC08131 ADC08134 and ADC08138 A track hold function allows the analog voltage at the positive input to vary during the actual A D conversion The analog inputs can be configured to operate in various combinations of single-ended differential or pseudo-differential modes In addition input voltage spans as small as 1V can beaccommodated

Features
Y Y Y

Y

Y Y Y Y Y

Serial digital data link requires few I O pins Analog input track hold function 2- 4- or 8-channel input multiplexer options with address logic 0V to 5V analog input range with single 5V power supply No zero or full scale adjustment required TTL CMOS input output compatible On chip 2 6V band-gap reference 0 3 standard width 8- 14- or 20-pin DIPpackage 14- 20-pin small-outline packages

Key Specifications
Y Y Y Y

Applications
Y Y Y Y Y Y

Y Y

Digitizing automotive sensors Process control monitoring Remote sensing in noisy environments Instrumentation Test systems Embedded diagnostics

Resolution Conversion time (fC e 1 MHz) Power dissipation Single supply g Total unadjusted error No missing codes over temperature

8 bits 8ms(max) 20mW (max) 5VDC ( g 5%) LSB and g 1LSB

TRI-STATE is a registered trademark of National Semiconductor Corporation COPSTM microcontrollers and MICROWIRETM are trademarks of National Semiconductor Corporation

Ordering Information
Industrial (b40 C s TA s a 85 C) ADC08031BIN ADC08031CIN ADC08032BIN ADC08032CIN ADC08034BIN ADC08034CIN ADC08038BIN ADC08038CIN ADC08031BIWM ADC08031CIWMADC08032BIWM ADC08032CIWM ADC08034BIWM ADC08034CIWM ADC08038BIWM ADC08038CIWM Package N08E N08E N14A N20A M14B M20B

C1995 National Semiconductor Corporation

TL H 10555

RRD-B30M75 Printed in U S A

Connection Diagrams
ADC08038 ADC08034

TL H 10555 – 3

TL H 10555–2

ADC08032 Dual-In-Line Package

ADC08031 Dual-In-Line Package

TL H 10555–4

TL H 10555 – 5

ADC08032 SmallOutline Package

ADC08031 Small Outline Package

TL H 10555–30

TL H 10555 – 31

2

Absolute Maximum Ratings (Notes 1

3)

Operating Ratings (Notes 2
Temperature Range ADC08031BIN ADC08031CIN ADC08032BIN ADC08032CIN ADC08034BIN ADC08034CIN ADC08038BIN ADC08038CIN ADC08031BIWM ADC08032BIWM ADC08034BIWM ADC08038BIWM ADC08031CIWM ADC08032CIWM ADC08034CIWM ADC08038CIWM Supply Voltage (VCC)If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage (VCC) 6 5V b 0 3V to VCC a 0 3V Voltage at Inputs and Outputs g 5 mA Input Current at Any Pin (Note 4) g 20 mA Package Input Current (Note 4) Power Dissipation at TA e 25 C (Note 5) 800 mW ESD Susceptibility (Note 6) 1500VSoldering Information N Package (10 sec ) 260 C SO Package Vapor Phase (60 sec ) 215 C Infrared (15 sec ) (Note 7) 220 C b 65 C to a 150 C Storage Temperature

3) TMIN s TA s TMAX b 40 C s TA s a 85 C

4 5 VDC to 6 3 VDC

Electrical Characteristics
The following specifications apply for VCC e VREF e a 5 VDC and fCLK e 1 MHz unless otherwise specified Boldface limits apply for TA e TJ e...