FEATURES

q 100kHz min SAMPLING RATE

q STANDARD

q 72dB min SINAD WITH 45kHz INPUT

q

q DNL: 12 Bits “No Missing Codes”

q SINGLE +5V SUPPLY OPERATION

q PIN-COMPATIBLE WITH 16-BIT ADS7805

q USES INTERNAL OR EXTERNAL

REFERENCE

q COMPLETE WITH S/H, REF, CLOCK, ETC.

q FULL PARALLEL DATA OUTPUT

q 100mW max POWER DISSIPATION

q 28-PIN 0.3" PLASTIC DIP AND SO PACKAGES

ADS7804

DESCRIPTION

The ADS7804 is a complete 12-bit sampling analog-to-digital

(A/D) converter using state-of-the-art CMOS structures. It

contains a complete 12-bit, capacitor-based, SAR A/D con-

verter with S/H, reference, clock, interface for microproces-

sor use, and three-state output drivers.

The ADS7804 is specified at a 100kHz sampling rate, and

guaranteed over the full temperature range. Laser-trimmed

scaling

resistors

provide

an

industry-

standard

±10V input range, while the innovative design

allows operation from a single +5V supply, with power

dissipation under 100mW.

The 28-pin ADS7804 is available in plastic 0.3" DIP and SO

packages, both fully specified for operation over the indus-

trial –40

°C to +85°C range.

12-Bit 10

ANALOG-to-DIGITAL CONVERTER

Successive Approximation Register and Control Logic

Clock

Output

Latches

and

Three

State

Drivers

Three

State

Parallel

Data

Bus

BUSY

Comparator

BYTE

CS

R/C

CDAC

Internal

+2.5V Ref

Buffer

4k

Ω

±10V Input

REF

CAP

20k

Ω

4k

Ω

10k

Ω

ADS7

804

ADS7804

SBAS019A – JANUARY 1992 – REVISED MAY 2003

www.ti.com

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright © 1992-2003, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.