1 Features

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• Dual RF sampling 12 GSPS transmit DACs

• Dual RF sampling 3 GSPS receive ADCs

• Maximum signal bandwidth per TX or RX: 400

MHz

• RF frequency range: 5 MHz - 7.4 GHz

• Digital step attenuators (DSA):

– TX: 40 dB range, 0.125 dB steps

– RX: 25 dB range, 0.5 dB steps

• Single or dual-band DUC/DDCs for TX and RX

• 16x NCOs per TX/RX

• Optional Internal PLL/VCO for DAC/ADC clocks or

external clock at DAC or ADC sample rate

• Sysref Alignment Detector

• SerDes data interface:

– JESD204B and JESD204C compatible

– 8 SerDes transceivers up to 29.5 Gbps

– Subclass 1 multi-device synchronization

• Package: 17 mm × 17 mm FCBGA, 0.8-mm pitch

2 Applications

• Radar

• Seeker Front End

• Defense Radio

• Tactical Communications Infrastructure

• Wireless Communications Test

3 Description

The AFE7903 is a high performance, wide bandwidth

multi-channel transceiver, integrating two RF sampling

transmitter chains and two RF sampling receiver

chains. With operation up to 7.4 GHz, this device

enables direct RF sampling in the HF, VHF, UHF,

L, S and C-band frequency ranges without the need

for additional frequency conversions stages. This

improvement in density and flexibility enables highchannel-

count, multi-mission systems.

The TX signal paths support interpolation and digital

up conversion options that deliver up to 400 MHz of

signal bandwidth. The output of the DUCs drives a

12 GSPS DAC (digital to analog converter) with a

mixed mode output option to enhance 2nd Nyquist

operation. The DAC output includes a variable gain

amplifier (TX DSA) with 40 dB range and 1 dB analog

and 0.125 dB digital steps.