12-Bit 400 MSPS
A/D Converter

AD12400


Rev. 0
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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 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
03735-0-001
ADC
A
DATA
READY
A
DATA
READY
B
DA0–DA11
DB0–DB11
CLK DISTRIBUTION
AD12400
POST-
PROCESSING
ADC
B
A
IN
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.