Isolated 16-Bit Sampling

ANALOG-TO-DIGITAL CONVERTER

DESCRIPTION

The ISO807 is a low-power isolated sampling ADC

using state-of-the-art CMOS structures and high volt-

age capacitors. The ISO807 contains a complete 16-bit

capacitor based SAR, ADC with S/H, clock, refer-

ence,

µP interface, serial out and galvanic isolation.

Laser-trimmed scaling resistors provide standard

industrial input ranges including

±10V, ±5V, 0-5V,

0-4V. They are available in 28-pin 0.6" wide plastic

DIP and are specified over the industrial temperature

range of –40

°C to +85°C.

FEATURES

q 1500Vrms ISOLATION CONTINUOUS

q 25

q 16-BIT SERIAL OUTPUT

q SINGLE +5V SUPPLY

q 28-PIN 0.6" PLASTIC DIP

APPLICATIONS

q INDUSTRIAL PROCESS CONTROL

q PC-BASED DATA ACQUISITION TEST

EQUIPMENT

®

PDS-1320B

Printed in U.S.A. August, 1997

ISO807

ISO807

6k

Ω

40k

Ω

10k

Ω

Internal

+2.5V Ref

Successive Approximation Register and Control Logic

Serial

Data

Out

Clock

Isolation

Barrier

40k

Ω

R1

IN

R2

IN

REF

CAP

BUSY

R/C

Data Clock

Serial Data

SB/BTC

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