Receiver downconverter targets energy efficient radar systems
The highly integrated device achieves a 10-dB noise figure that is claimed to be 3 dB better than competing devices, while using 50% less power. The ADF5904 is assembled in a small 5 x 5-mm LFCSP plastic package.
Each of the device’s four on-chip receive channels uses a simple, single-ended connection to four individual antennas, which simplifies RF-transmission line design and PCB layout, and reduces board size. The receiver downconverter then simultaneously handles four receive signals directly to produce a high-quality, high-amplitude baseband signal that connects to one of ADI’s four-channel analogue-to-digital converters.
The ADF5904 also incorporates an integrated temperature sensor that eliminates the need for discrete sensing components that otherwise can require additional time and resources to calibrate during system assembly and test. The device is designed for multi-channel receiver, high-frequency applications that use digital beam forming, such as automotive ADAS, microwave radar sensors, and industrial radar systems – environments where energy efficiency is becoming a more important system-level design consideration.
Features include:
- Four receive channels;
- Rx channel gain: 22 dB;
- Noise figure: 10 dB;
- P1db: -10 dBm;
- Power consumption: 0.5mW – all four channels powered on;
- LO input range: -8 dBm to +5 dBm;
- Rx to IF isolation: 30 dB;
- RF signal bandwidth: 250 MHz;
- On-chip temperature sensor with analogue output: ±5°.
The ADF5904 will be priced at $22.50 (1000), and an evaluation board, the EV-ADF5904SD2Z, is $400.
ADF5904 4-channel, 24-GHz receiver downconverter datasheet (PDF)
ADF5904 Evaluation Board information page
Analog Devices; www.analog.com/adf5904
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