AFE7958IALK中文资料德州仪器数据手册PDF规格书

1 Features

• Request full data sheet

• Four RF sampling 12GSPS DACs

• Six RF sampling 3GSPS ADCs

• Maximum RF signal bandwidth:

– 4TX: 1200 MHz; 2TX: 2400MHz

– 4RX: 1200 MHz; 6RX: 600MHz

• RF frequency range:

– TX: 600MHz to 12GHz

– RX: 5MHz to 12GHz

• Digital step attenuators (DSA):

– TX: 39dB range, 0.125dB steps

– RX: 25dB range, 0.5dB steps

• Digital Up-Converters (DUC) and Digital Down-

Converters (DDC): Fast frequency hopping

using 16 pre-configurable Numerically Controlled

Oscillators (NCOs) in DDC and DUC

• Flexible clocking options:

– External RF clock

– Internal PLL mode with low speed input clock

• SerDes data interface:

– JESD204B and JESD204C compatible

– TX: 8 lanes, RX/FB: 8 lanes, up to 24.75Gbps

– Subclass 1 multi-device synchronization

– SYSREF alignment detector

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

2 Applications

• Radar

• Seeker front end

• Defense radio

• Tactical communications infrastructure

• Wireless communications test

• Satellite constellation ground-stations

3 Description

The AFE7958 is a high performance, wide bandwidth

multi-channel transceiver, integrating four (4T) RF

sampling transmitter (TX) chains and a total of six

(6R) RF sampling receivers. With operation up to

12GHz, the AFE enables direct RF sampling in the L,

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

for additional frequency conversions stages. This

high density and configurability enables high-channelcount,

multi-mission systems.

The TX and RX interface data rates can be chosen

based on signal bandwidths, and is limited by the

JESD204B/C interface speed. The data streams are

matched to the DAC update rate or to the ADC

conversion rate using interpolation in the DUC or

decimation in the DDC.

The DAC runs at a maximum rate of 12GSPS, and

has a mode to operate in the 2nd Nyquist, enabling

the generation of RF signals up to 12GHz. A variable

gain amplifier (termed as TDSA) enables changing

the power output from the transmitter.

Each receive chain has a Digital Step Attenuator

(RDSA) followed by a 3GSPS ADC which can convert

higher Nyquist zones to digitize RF signals up to a

maximum of 12GHz. Digital peak detectors at the

ADC output can be configured to assist an external

Automatic Gain control (AGC) loop to control LNA

(external) gain and DSA (internal) attenuation.

The AFE7958 can be programmed using the SPI

interface. The device also has several GPIOs that can

be configured to provide interrupts and to achieve a

fast control of functions like NCO switching.