16-Bit 250kHz Sampling CMOS

ANALOG-to-DIGITAL CONVERTER

DESCRIPTION

The ADS7815 is a complete 16-bit sampling analog-

to-digital (A/D) converter featuring excellent AC

performance and a 250kHz throughput rate. The de-

sign includes a 16-bit capacitor-based SAR A/D

converter with an inherent sample and hold (S/H), a

precision reference, and an internal clock. Spurious-

free dynamic range with a 100kHz full-scale sinewave

input is typically greater than 100dB. The

±2.5V input

range allows development of precision systems using

only

±5V supplies. The converter is available in a

28-lead SOIC package specified for operation over

the industrial –25

°C to +85°C temperature range.

ADS7815

®

FEATURES

q 250kHz SAMPLING RATE

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

q 96dB min SFDR WITH 100kHz INPUT

q 84dB min SINAD

q

q 28-LEAD SOIC

CDAC

Output

Latches

and

Three

State

Drivers

Comparator

Buffer

5k

Ω

REF Out/In

±2.5V Input

Successive Approximation Register and Control Logic

Clock

BUSY

CS

R/C

Internal

+2.5V Ref

Parallel

Data

Bus

PDS-1364A

Printed in U.S.A. December, 1996

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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

APPLICATIONS

q WIRELESS BASE STATIONS

q SPECTRUM ANALYSIS

q IMAGING SYSTEMS

q DATA ACQUISITION

ADS7815