© 1989 Burr-Brown Corporation

PDS-1018E

Printed in U.S.A. October, 1993

12-Bit 3

ANALOG-TO-DIGITAL CONVERTER

FEATURES

q 333k SAMPLES PER SECOND

q STANDARD

RANGES

q DC PERFORMANCE OVER TEMP:

No Missing Codes

1/2LSB Integral Linearity Error

3/4LSB Differential Linearity Error

q AC PERFORMANCE OVER TEMP:

72dB Signal-to-Noise Ratio

80dB Spurious-free Dynamic Range

–80dB Total Harmonic Distortion

q INTERNAL SAMPLE/HOLD, REFERENCE,

CLOCK, AND 3-STATE OUTPUTS

q POWER DISSIPATION: 215mW max

q PACKAGE: 24-Pin Single-wide DIP

24-Lead SOIC

Comparator

Control

Logic

Internal

Ref

2V

Reference

Out

±5V

IN

±10V

IN

CDAC

SAR

BUSY

Three

State

Parallel

Output

Data

Bus

Clock

Output

Latches

And

Three

State

Drivers

®

ADS7800

DESCRIPTION

The ADS7800 is a complete 12-bit sampling analog-

to-digital converter using state-of-the-art CMOS struc-

tures. It contains a complete 12-bit successive ap-

proximation A/D converter with internal sample/hold,

reference, clock, digital interface for microprocessor

control, and three-state output drivers.

The ADS7800 is specified at a 333kHz sampling rate.

Conversion time is factory set for 2.70

µs max over

temperature, and the high speed sampling input stage

insures a total acquisition and conversion time of 3

µs

max over temperature. Precision, laser-trimmed scal-

ing resistors provide industry-standard input ranges of

±5V or ±10V.

AC and DC performance are completely specified.

Two grades based on linearity and dynamic perform-

ance are available to provide the optimum price/

performance fit in a wide range of applications.

The 24-pin ADS7800 is available in plastic and side-

braze hermetic 0.3" wide DIPs, and in an SOIC

package. It operates from a +5V supply and either a

–12V or –15V supply. The ADS7800 is available in

grades specified over 0

°C to +70°C and –40°C to

+85

°C temperature ranges.

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