MAX2851

 

Part Number	Replacement	Explanation

Description

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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.

Key Features

• 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)

Applications/Uses

• 5GHz Beam Steering Receiver
• 5GHz FDD Backhaul and WiMax™
• 5GHz MIMO Receiver Up to Five Spatial Streams
• 5GHz Wireless HDMI (WHDI™)