12-Bit, 53MHz Sampling

ANALOG-TO-DIGITAL CONVERTER

FEATURES

q SPURIOUS-FREE DYNAMIC RANGE:

q HIGH SNR: 67.5dB (2Vp-p), 69dB (3Vp-p)

q LOW POWER: 335mW

q INTERNAL OR EXTERNAL REFERENCE

q LOW DNL: 0.5LSB

q FLEXIBLE INPUT RANGE: 2Vp-p to 3Vp-p

q SSOP-28 PACKAGE

DESCRIPTION

The ADS807 is a high-speed, high dynamic range,

12-bit pipelined Analog-to-Digital (A/D) converter. This con-

verter includes a high-bandwidth track-and-hold that gives

excellent spurious performance up to and beyond the Nyquist

rate. The differential nature of this track-and-hold and A/D

converter circuitry minimizes even-order harmonics and gives

excellent common-mode noise immunity. The track-and-hold

can also be operated single-ended.

The ADS807 provides for setting the full-scale range of the

converter without any external reference circuitry. The inter-

nal reference can be disabled allowing low drive, internal

references to be used for improved tracking in multichannel

systems.

The ADS807 provides an over-range indicator flag to indicate

an input signal that exceeds the full-scale input range of the

converter. This flag can be used to reduce the gain of front

end gain control circuitry. There is also an output enable pin

to allow for multiplexing and testability on a PC board.

The ADS807 employs digital error correction techniques to

provide excellent differential linearity for demanding imaging

applications.

APPLICATIONS

q COMMUNICATIONS IF PROCESSING

q COMMUNICATIONS BASESTATIONS

q TEST EQUIPMENT

q MEDICAL IMAGING

q VIDEO DIGITIZING

q CCD DIGITIZING

ADS8

07E

Pipelined

A/D

Converter

Internal

Reference

Optional External

Reference

Timing

Circuitry

Error

Correction

Logic

3-State

Outputs

T/H

D0

•

•

•

D11

CLK

ADS807

OE

IN

INT/EXT

IN

CM

+2.5V

+2.5V

+3V

+2V

+2V

+3V

FS

SEL

(Opt.)

ADS807

SBAS072A – JANUARY 1999 – REVISED JULY 2002

www.ti.com

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright © 1999, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.