AFE7954 Quad RF Sampling 12 GSPS Digital-to-Analog Converter (DAC)

1 Features

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• Quad RF sampling 12-GSPS DACs

• Maximum RF signal bandwidth:

– 4TX: 1200 MHz or

– 2TX: 2400 MHz

• RF frequency range: 600 MHz - 12 GHz

• Digital step attenuators (DSA):

– TX: 40 dB range, 0.125-dB steps

• Single or dual-band DUCs

• 16x NCOs per TX

• Optional Internal PLL/VCO for DAC or external

clock at DAC sample rate

• SerDes data interface:

– JESD204B and JESD204C compatible

– 8 SerDes receivers 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 AFE7954 is a high performance, wide bandwidth

quad channel RF sampling DAC. With operation up

to 12 GHz, this device enables direct RF sampling

in the L, S, C and X-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 signal paths support interpolation and digital up

conversion options that deliver up to 1200 MHz of

signal bandwidth for four DACs (TX) or 2400 MHz for

two DACs. 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.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

AFE7954

FC-BGA

17 mm × 17 mm

(1)

For more information, see Mechanical, Packaging, and

Orderable Information.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

1TX+/-

CLKIN+/-

SYSREF+/-

PLL

DAC

DUC

DUC

DUC

DUC

2TX+/-

3TX+/-

4TX+/-

DAC

DAC

DSA

DSA

DSA

DSA

DAC

1SRX+/-

8SRX+/-

2SRX+/-

3SRX+/-

4SRX+/-

5SRX+/-

6SRX+/-

7SRX+/-

Functional Block Diagram

AFE7954

SBASAO7 – JULY 2023

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.