1

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ADS7818

ADS7818

ADS7818

DESCRIPTION

The ADS7818 is a 12-bit sampling analog-to-digital

converter (A/D) complete with sample/hold, internal

2.5V reference, and synchronous serial interface. Typi-

cal power dissipation is 11mW at a 500kHz through-

put rate. The device can be placed into a power down

mode which reduces dissipation to just 2.5mW. The

input range is zero to two times the reference voltage,

and the internal reference can be overdriven by an

external voltage.

Low power, small size, and high-speed make the

ADS7818 ideal for battery operated systems such as

wireless communication devices, portable multi-chan-

nel data loggers, and spectrum analyzers. The serial

interface also provides low-cost isolation for remote

data acquisition. The ADS7818 is available in a plas-

tic mini-DIP-8 or an MSOP-8 package and is guaran-

teed 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: 11mW

q SINGLE SUPPLY +5V OPERATION

q DIFFERENTIAL INPUT

q SERIAL INTERFACE

q GUARANTEED NO MISSING CODES

q MINI-DIP-8 AND MSOP-8

q UNIPOLAR INPUT RANGE

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

APPLICATIONS

q BATTERY OPERATED SYSTEMS

q DIGITAL SIGNAL PROCESSING

q HIGH SPEED DATA ACQUISITION

q WIRELESS COMMUNICATION SYSTEMS

PDS-1408B

Printed in U.S.A. May, 2000

SAR

CLK

Serial

Interface

Comparator

S/H Amp

DATA

+In

–In

CDAC

Internal

+2.5V Ref

Buffer

V

REF

CONV

10k

Ω ±30%

For most current data sheet and other product

information, visit www.burr-brown.com