ADC1001

10-Bit µP Compatible A/D Converter

General Description

The ADC1001 is a CMOS, 10-bit successive approximation

A/D converter. The 20-pin ADC1001 is pin compatible with

the ADC0801 8-bit A/D family. The 10-bit data word is read in

two 8-bit bytes, formatted left justified and high byte first. The

six least significant bits of the second byte are set to zero, as

is proper for a 16-bit word.

Differential inputs provide low frequency input common

mode rejection and allow offsetting the analog range of the

converter. In addition, the reference input can be adjusted

enabling the conversion of reduced analog ranges with

10-bit resolution.

Key Specifications

n Resolution

10 bits

n Linearity error

n Conversion time

200µS

Features

n ADC1001 is pin compatible with ADC0801 series 8-bit

A/D converters

n Compatible with NSC800 and 8080 µP derivatives — no

interfacing logic needed

n Easily interfaced to 6800 µP derivatives

n Differential analog voltage inputs

n Logic inputs and outputs meet both MOS and TTL

voltage level specifications

n Works with 2.5V (LM336) voltage reference

n On-chip clock generator

n 0V to 5V analog input voltage range with single 5V

supply

analog span adjusted voltage reference

n 0.3" standard width 20-pin DIP package

Connection Diagram

Ordering Information

Temperature

Range

0˚C to +70˚C

−40˚C to +85˚C

Order Number

ADC1001CCJ-1

ADC1001CCJ

Package Outline

J20A

J20A

ADC1001

Dual-In-Line Package

DS005675-11

Top View

June 1999

© 1999 National Semiconductor Corporation

DS005675

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