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Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

FEATURES

q 100kHz min SAMPLING RATE

q STANDARD

q 86dB min SINAD WITH 20kHz INPUT

q

q DNL: 16-bits “No Missing Codes”

q SINGLE +5V SUPPLY OPERATION

q PIN-COMPATIBLE WITH 12-BIT ADS7804

q USES INTERNAL OR EXTERNAL

REFERENCE

q FULL PARALLEL DATA OUTPUT

q 100mW max POWER DISSIPATION

q 28-PIN 0.3" PLASTIC DIP AND SOIC

ADS7805

DESCRIPTION

The ADS7805 is a complete 16-bit sampling A/D

using state-of-the-art CMOS structures. It contains a

complete 16-bit, capacitor-based, SAR A/D with S/H,

reference, clock, interface for microprocessor use, and

three-state output drivers.

The ADS7805 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 de-

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

power dissipation under 100mW.

The 28-pin ADS7805 is available in a plastic 0.3" DIP

and in an SOIC, both fully specified for operation over

the industrial –25

°C to +85°C range.

16-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

®

DEMO BOARD

AVAILABLE

See Appendix A

PDS-1157E

Printed in U.S.A. August, 1996