1

ADS7835

®

ADS7835

DESCRIPTION

The ADS7835 is a 12-bit, sampling analog-to-digi-

tal converter (A/D) complete with sample-and-hold

(S/H), internal 2.5V reference, and synchronous

serial interface. Typical power dissipation is 17.5mW

at a 500kHz throughput rate. The device can be

placed into a power-down mode which reduces dis-

sipation to just 2.5mW. The input range is –VREF to

+VREF, and the internal reference can be overdriven

by an external voltage.

Low power, small size, and high speed make the

ADS7835 ideal for battery-operated systems such

as wireless communication devices, portable multi-

channel data loggers, and spectrum analyzers. The

serial interface also provides low cost isolation for

remote data acquisition. The ADS7835 is avail-

able in an MSOP-8 package and is guaranteed over

the –40

°C to +85°C temperature range.

12-Bit, High-Speed, Low Power Sampling

ANALOG-TO-DIGITAL CONVERTER

®

FEATURES

q 500kHz THROUGHPUT RATE

q 2.5V INTERNAL REFERENCE

q LOW POWER: 17.5mW

q SINGLE SUPPLY +5V OPERATION

q SERIAL INTERFACE

q GUARANTEED NO MISSING CODES

q MSOP-8

q

±V

REF INPUT RANGE

APPLICATIONS

q BATTERY-OPERATED SYSTEMS

q DIGITAL SIGNAL PROCESSING

q HIGH-SPEED DATA ACQUISITION

q WIRELESS COMMUNICATION SYSTEMS

©1998 Burr-Brown Corporation

PDS-1478B

Printed in U.S.A.May, 2000

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111

Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

SAR

CLK

Serial

Interface

Comparator

S/H Amp

DATA

±2.5V

Input

CDAC

Internal

+2.5V Ref

Buffer

V

REF

CONV

10k

Ω ±30%

2k

Ω

2k

Ω

For most current data sheet and other product

information, visit www.burr-brown.com

SBAS102