76GHz to 81GHz FMCW Radar Receiver

Overview

The WEA7681RX22G is a complete Zero-IF receiver for radar applications covering the 76 GHz to 81 GHz automotive band. The receiver integrates a Low Noise Amplifier, a down conversion mixer, a 1st order active highpass filter, a 1st order passive high pass filter and a 3rd order lowpass filter and a variable gain amplifier with digital gain control. The local oscillator chain is also integrated on the same IP. The LO accepts an input at 38 GHz to 40.5 GHz. The receiver has a dual saturation detector scheme for strong blocker detection at the mixer and the filter output. The receiver has a build-in Analog Test Bus (ATB) for complete monitoring of the bias conditions of all blocks, for FuSa. It is implemented in 22FDX FD-SOI process. The WEA7681RX22G occupies a silicon area of 1450 um x 450 um.

Key Features

RF Input Frequency Range: 76 GHz to 81 GHz
LO Input Frequency Range: 38 GHz to 40.5GHz
Output Frequency Range: DC-120 MHz
Power Supply Voltages: 1.8V Analog, 0.8V RF, 0.8V Logic.
RX noise figure: 8.7 dB typ. (Includes 1dB loss from package to silicon transition)
Programmable RX Gain: 22.5 – 62.5 dB
RX In-band OIP3: 29 dBm
Input 1dBCP: -19 dBm (front end compression)
RX Channel Flatness @ 1GHz BW: 0.19 dB
Programmable IF Bandwidth:
Low Pass Filter Cut-off: 60 MHz - 120 MHz
High Pass Filter Cut-off: 2 MHz - 30 MHz
Automotive Grade 1 (-40 oC to 125 oC).
Power Consumption: 203 mW
Area:1450 um x 450 um

Block Diagram

Applications

Automotive Radar applications

Deliverables

GDSII, Database, SystemVerilog Models

Technical Specifications

Foundry, Node

GLOBALFOUNDRIES 22nm 22FDX

Maturity

GDS Ready

Availability

22FDX FD-SOI

GLOBALFOUNDRIES

Pre-Silicon: 22nm FDX

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