12-Bit 400 MSPS

A/D Converter

AD12400

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.326.8703

© 2003 Analog Devices, Inc. All rights reserved.

FEATURES

400 MSPS sample rate

SNR of 63 dBFS @128 MHz

SFDR of 70 dBFS @128 MHz

VSWR of 1:1.5

Wideband ac-coupled input signal conditioning

Enhanced spurious-free dynamic range

Single-ended or differential encode signal

LVDS output levels

Twos complement output data

APPLICATIONS

Communications test equipment

Radar and satellite subsystems

Phased array antennas—digital beam forming

Multichannel, multimode receivers

Secure communications

Wireless and wired broadband communications

Wideband carrier frequency systems

GENERAL DESCRIPTION

The AD12400 is a 12-bit analog-to-digital converter with a

transformer-coupled analog input and digital post processing

for enhanced SFDR. The product operates at a 400 MSPS

conversion rate with outstanding dynamic performance in

wideband carrier systems.

The AD12400 requires 3.8 V analog, 3.3 V digital, and 1.5 V

digital supplies and provides a flexible encode signal that can be

differential or single-ended. No external reference is required.

The AD12400 package style is an enclosed 2.9" × 2.6" × 0.6"

module. Performance is rated over a 0°C to 60°C case

temperature range.

FUNCTIONAL BLOCK DIAGRAM

ADC

A

DATA

READY

A

DATA

READY

B

DA0–DA11

DB0–DB11

CLK DISTRIBUTION

AD12400

POST-

PROCESSING

ADC

B

CLOCK DISTRIBUTION

DIVIDE BY 2

ENC

ENC

Figure 1.

PRODUCT HIGHLIGHTS

1.

Guaranteed sample rate of 400 MSPS.

2.

Input signal conditioning with optimized dynamic

performance to 180 MHz.

3.

Additional performance options available—contact factory.

4.

Proprietary Advanced Filter Bank™ digital post processing

from VCorp® Technologies, Inc.