MAX2851 5GHz, 5-Channel MIMO Receiver

The MAX2851 is a single-chip, 5-channel RF receiver IC designed for 5GHz wireless HDMI™ applications. The IC includes all circuitry required to implement the complete 5-channel MIMO RF receiver function and crystal oscillator, providing a fully integrated receive path, VCO, frequency synthesis, and baseband/control interface. It includes a fast-settling sigma-delta RF fractional synthesizer with 76Hz frequency programming step size. The IC also integrates on-chip I/Q amplitude and phase-error calibration circuits. The receiver includes both an in-channel RSSI and also an RF RSSI.

On-chip monolithic filters are included for receiver I/Q baseband signal channel selection, for supporting both 20MHz and 40MHz RF channels. The baseband filtering and Rx signal paths are optimized to meet stringent WHDI requirements. The downconverter local oscillator is coherent among all the receiver channels.

The reverse-link control channel uses an on-chip 5GHz OFDM transmitter. It shares the RF synthesizer and LO generation circuit with the MIMO receivers. Dynamic on/off control of the external PA is implemented with programmable precision voltage. An analog mux routes external PA power-detect voltage to the RSSI pin.

The MIMO receiver chip is housed in a small 68-pin TQFN leadless plastic package with exposed paddle.

关键特性

5GHz, 5x MIMO Downlink Receivers, Single-Uplink IEEE 802.11a Transmitter

4900MHz to 5900MHz Frequency Range

Coherent LO Among Receivers

4.5dB Rx Noise Figure

70dB Rx Gain Control Range with 2dB Step Size, Digitally Controlled

60dB Dynamic Range Receiver RSSI

RF Wideband Receiver RSSI

Programmable 20MHz/40MHz Rx I/Q Lowpass Channel Filters

-5dBm Transmit Power (54Mbps OFDM)

31dB Tx Gain Control Range with 0.5dB Step Size, Digitally Controlled

Tx/Rx I/Q Error and LO Leakage Detection and Adjustment

Programmable 20MHz/40MHz Tx I/Q Lowpass Anti-Aliasing Filter

Analog Mux for PA Power Detect

PA On/Off Control

Sigma-Delta Fractional-N PLL with 76Hz Resolution

Monolithic Low-Noise VCO with -35dBc Integrated Phase Noise

4-Wire SPI™ Digital Interface

I/Q Analog Baseband Interface

Digital Tx/Rx Mode Control

On-Chip Digital Temperature Sensor Readout

Complete Baseband Interface

Digital Tx/Rx Mode Control

+2.7V to +3.6V Supply Voltage

Small 68-Pin TQFN Package (10mm x 10mm)

应用/使用

5GHz波束监控接收器

5GHz FDD回程与WiMax™

5GHz MIMO Receiver Up to Five Spatial Streams

5GHz Wireless HDMI (WHDI™)