Texas Instruments ADS2807 Handleiding

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ADS2807

Dual, 12-Bit, 50MHz Sampling

ANALOG-TO-DIGITAL CONVERTER

FEATURES

●HIGH SNR: 66dB (2Vp-p), 68dB (3Vp-p)

●LOW POWER: 720mW

●INTERNAL OR EXTERNAL REFERENCE

●LOW DLE: 0.6LSB

●FLEXIBLE INPUT RANGE: 2Vp-p to 3Vp-p

●TQFP-64 POWER PACKAGE

APPLICATIONS

●COMMUNICATIONS IF PROCESSING

●COMMUNICATIONS BASESTATIONS

● TEST EQUIPMENT

●MEDICAL IMAGING

●VIDEO DIGITIZING

●CCD DIGITIZING

Optional External

Reference

12-Bit

Pipelined

ADC

Error

Correction

Logic

Timing

Circuitry

Internal

Reference

3-State

Outputs

T&H

D12A

•

•

•

D1A

12-Bit

Pipelined

ADC

Error

Correction

Logic

3-State

Outputs

T&H

D12B

•

•

•

D1B

IN

A

CM

A

+V

S

OE

A

OVR

A

OVR

B

IN

A

INT/EXT

CLK

FS

SEL

(Opt.)

IN

B

V

IN

CM

B

OE

B

IN

B

(Opt.)

ADS2807

V

IN

DESCRIPTION

The ADS2807 is a dual, high-speed, high dynamic range,

12-bit pipelined Analog-to-Digital Converter (ADC). This

converter 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 ADC circuitry minimizes even-order harmonics and

gives excellent common-mode noise immunity. The track-

and-hold can also be operated single-ended.

The ADS2807 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, external

references to be used for improved tracking in multichannel

systems.

The ADS2807 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 ADS2807 employs digital error correction techniques to

provide excellent differential linearity for demanding imag-

ing applications. The ADS2807 is available in a TQFP-64

power package.

ADS2807

SBAS169B – NOVEMBER 2000 – REVISED MAY 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 © 2000, 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.

Product specificaties