12-Bit, 400 MSPS A/D Converter

AD12400

Rev. A

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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

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 (ADC)

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 (AFB™) digital

postprocessing from V Corp Technologies, Inc.