1 Features

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• Dual RF sampling 12-GSPS transmit DACs

• Dual RF sampling 3-GSPS receive ADCs

• Maximum RF signal bandwidth: 400 MHz

• RF frequency range: 600 MHz - 12 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 or DDCs

• 16x NCOs per TX or RX

• Optional Internal PLL or VCO for DAC or ADC

clocks or external clock at DAC or ADC sample

rate

• 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 AFE7953 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 12 GHz, this device

enables direct RF sampling in the L, S, C and Xband

frequency ranges without the need for additional

frequency conversions stages. This improvement in

density and flexibility enables high-channel-count,

multi-mission systems.

The TX signal paths support interpolation and digital

up conversion options that deliver up to 400 MHz

of signal bandwidth per TX channel. 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.