1 Features

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• Quad RF sampling 12-GSPS transmit DACs

• Quad RF sampling 3-GSPS receive ADCs

• Dual RF sampling 3-GSPS feedback (auxilliary

RX) ADCs

• Maximum RF signal bandwidth:

– 4TX or 2FB: 1200 MHz or 2TX: 2400 MHz

– RX): 1200 MHz (no FB), 600 MHz (with FB)

• RF frequency range:

– TX: 5MHz - 7.4GHz

– RX/FB: 5MHz -7.4GHz

• Digital step attenuators (DSA):

– TX: 40 dB range, 0.125-dB steps

– RX or FB: 25 dB range, 0.5-dB steps

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

• 16x NCOs per TX or RX and FB

• Optional Internal PLL or VCO for DAC or 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 AFE7900 is a high performance, wide

bandwidth multi-channel transceiver, integrating four

RF sampling transmitter chains, four RF sampling

receiver chains and two RF sampling feedback chains

(six RF sampling ADCs total). With operation up to

7.4 GHz, this device enables direct RF sampling in

the L, S and C-band 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 1200 MHz

of signal bandwidth for four TX or 2400 MHz for two

TX. 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.