Hoja De Datos Adc0834

ADC0831/ADC0832/ADC0834/ADC0838 8-Bit Serial I/O A/D Converters with Multiplexer Options

July 2002

ADC0831/ADC0832/ADC0834/ADC0838 8-Bit Serial I/O A/D Converters with Multiplexer Options
General Description
The ADC0831 series are 8-bit successive approximation A/D converters with a serial I/O and configurable input multiplexers with up to 8 channels. The serial I/O is configured tocomply with the NSC MICROWIRE™ serial data exchange standard for easy interface to the COPS™ family of processors, and can interface with standard shift registers or µPs. The 2-, 4- or 8-channel multiplexers are software configured for single-ended or differential inputs as well as channel assignment. The differential analog voltage input allows increasing the common-mode rejection and offsetting theanalog zero input voltage value. In addition, the voltage reference input can be adjusted to allow encoding any smaller analog voltage span to the full 8 bits of resolution. n n n n n n n n n n Operates ratiometrically or with 5 VDC voltage reference No zero or full-scale adjust required 2-, 4- or 8-channel multiplexer options with address logic Shunt regulator allows operation with high voltagesupplies 0V to 5V input range with single 5V power supply Remote operation with serial digital data link TTL/MOS input/output compatible 0.3" standard width, 8-, 14- or 20-pin DIP package 20 Pin Molded Chip Carrier Package (ADC0838 only) Surface-Mount Package

Key Specifications
n n n n n Resolution Total Unadjusted Error Single Supply Low Power Conversion Time 8 Bits

± 1⁄2 LSB and ± 1 LSB
5VDC 15 mW 32 µs

Features
n NSC MICROWIRE compatible — direct interface to COPS family processors n Easy interface to all microprocessors, or operates “stand-alone”

Typical Application

00558301

TRI-STATE ® is a registered trademark of National Semiconductor Corporation. COPS™ and MICROWIRE™ are trademarks of National Semiconductor Corporation.

© 2002 National SemiconductorCorporation

DS005583

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ADC0831/ADC0832/ADC0834/ADC0838

Connection Diagrams
ADC0838 8-Channel Mux Small Outline/Dual-In-Line Package (WM and N)

ADC0832 2-Channel MUX Small Outline Package (WM)

00558341

Top View ADC0831 Single Differential Input Dual-In-Line Package (N)

00558308

Top View ADC0834 4-Channel MUX Small Outline/Dual-In-Line Package (WM and N)00558332

Top View ADC0831 Single Differential Input Small Outline Package (WM)

00558330

COM internally connected to A GND Top View

Top View ADC0832 2-Channel MUX Dual-In-Line Package (N)
00558342

Top View ADC0838 8-Channel MUX Molded Chip Carrier (PCC) Package (V)
00558331

COM internally connected to GND. VREF internally connected to VCC. Top View

Top View

00558333www.national.com

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Ordering Information
Part Number ADC0831CCN ADC0831CCWM ADC0832CIWM ADC0832CCN ADC0832CCWM ADC0834BCN ADC0834CCN ADC0834CCWM ADC0838BCV ADC0838CCV ADC0838CCN ADC0838CIWM ADC0838CCWM See NS Package Number M14B, M20B, N08E, N14A, N20A or V20A 8 4 2 Analog Input Channels 1 Total Unadjusted Error Package Molded (N) SO(M) SO(M) Molded (N) SO(M)Temperature Range 0˚C to +70˚C 0˚C to +70˚C −40˚C to +85˚C 0˚C to +70˚C 0˚C to +70˚C 0˚C to +70˚C 0˚C to +70˚C 0˚C to +70˚C 0˚C to +70˚C 0˚C to +70˚C 0˚C to +70˚C −40˚C to +85˚C 0˚C to +70˚C

±1 ±1

± 1⁄2 ±1 ± 1⁄2 ±1

Molded (N) Molded (N) SO(M) PCC (V) PCC (V) Molded (N) SO(M) SO(M)

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ADC0831/ADC0832/ADC0834/ADC0838

Absolute Maximum Ratings
2)

(Notes 1,Dual-In-Line Package (Plastic) Molded Chip Carrier Package Vapor Phase (60 sec.) Infrared (15 sec.) ESD Susceptibility (Note 5)

260˚C 215˚C 220˚C 2000V

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Current into V (Note 3) Supply Voltage, VCC (Note 3) Voltage Logic Inputs Analog...