SPT7721 datasheet(1/11 Pages) CADEKA

No de pièce	SPT7721

Description	8-BIT, 250 MSPS ADC WITH DEMUXED OUTPUTS

PDF	11 Pages

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Fabricant	CADEKA [Cadeka Microcircuits LLC.]

Site Internet	http://www.cadeka.com

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SPT7721

8-BIT, 250 MSPS ADC WITH DEMUXED OUTPUTS

TECHNICAL DATA

NOVEMBER 8, 2001

GENERAL DESCRIPTION

The SPT7721 is a high-speed, 8-bit analog-to-digital con-

verter implemented in an advanced BiCMOS process. An

advanced folding and interpolating architecture provides

both a high conversion rate and very low power dissipation

of only 310 mW. The analog inputs can be operated in

either single-ended or differential input mode. A 2.5 V com-

mon mode reference is provided on chip for the single-

ended input mode to minimize external components.

The SPT7721 digital outputs are demuxed (double-wide)

with both dual-channel and single-channel selectable out-

put modes. Demuxed mode supports either parallel

aligned or interleaved data output. The output logic is both

+3.0 V and +5.0 V compatible. The SPT7721 is available in

a 44-lead TQFP surface mount package over the industrial

temperature range of –40 to +85 °C.

APPLICATIONS

• RGB video processing

• Digital communications

• High-speed instrumentation

• Projection display systems

FEATURES

• TTL/CMOS/PECL compatible

• High conversion rate: 250 MSPS

• Single +5 V power supply

• Very low power dissipation: 310 mW

• Power-down mode

• +3.0 V/+5.0 V (LVCMOS) digital output logic

compatibility

• Demuxed output ports

8-Bit

250 MSPS

ADC

CLK CLK

DB0DB7

Common Mode

Voltage

Reference

+2.5 V

VCM

AVCC

OVDD

AGND

DGND

DA0DA7

PD

CLK CLK Reset

&

VIN+

VIN

DCLKOUT

Data Output

Mode Control

DMODE1,2

2

Reset

BLOCK DIAGRAM

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