Click here for production status of specific part numbers. MAX2850 5GHz, 4-Channel MIMO Transmitter General Description Features The MAX2850 is a single-chip, 4-channel RF transmitter 5GHz 4x MIMO Downlink Transmitters, Single IC designed for 5GHz wireless HDMI applications. The Uplink IEEE 802.11a Receiver IC includes all circuitry required to implement the com- 4900MHz to 5900MHz Frequency Range plete 4-channel MIMO RF transmitter function and crystal -5dBm Transmit Power (54Mbps OFDM) oscillator, providing a fully integrated transmit path, VCO, Coherent LO Among Transmitters 31dB Tx Gain-Control Range with 0.5dB Step Size, frequency synthesis, and baseband/control interface. It includes a fast-settling, sigma-delta RF fractional Digitally Controlled Tx/Rx I/Q Error and LO Leakage Detection and synthesizer with 76Hz frequency programming step size. The IC also integrates on-chip I/Q amplitude and Adjustment Programmable 20MHz/40MHz Tx I/Q Lowpass phase-error calibration circuits. Dynamic on/off control Anti-Aliasing Filter of four external PAs is implemented with programmable 4-to-1 Analog Mux for PA Power Detect precision voltages. A 4-to-1 analog mux routes external 4-Channel PA On/Off Control PA power-detect voltages to the RSSI pin. 4.5dB Rx Noise Figure On-chip monolithic filters are included for transmitter I/Q 70dB Rx Gain-Control Range with 2dB Step Size, baseband signal reconstruction to support both 20MHz Digitally Controlled and 40MHz RF channels. The baseband filtering and 60dB Dynamic Range Receiver RSSI Tx signal paths are optimized to meet stringent WHDI RF Wideband Receiver RSSI requirements. The upconverter local oscillator is coherent Programmable 20MHz/40MHz Rx I/Q Lowpass among all the transmitter channels. Channel Filters The reverse-link control channel uses an on-chip 5GHz Sigma-Delta Fractional-N PLL with 76Hz OFDM receiver. It shares the RF synthesizer and LO gen- Resolution eration circuit with the MIMO transmitters. The receiver Monolithic Low-Noise VCO with -35dBc Integrated includes both an in-channel RSSI and an RF RSSI. Phase Noise 4-Wire SPI Digital Interface The MIMO transmitter chip is housed in a small, 68-pin I/Q Analog Baseband Interface thin QFN leadless plastic package with exposed pad. Digital Tx/Rx Mode Control On-Chip Digital Temperature Sensor Readout Applications Complete Baseband Interface 5GHz Wireless HDMI (WHDI) Digital Tx/Rx Mode Control 5GHz FDD Backhaul and WiMax 5GHz MIMO Transmitter Up to Four Spatial Streams +2.7V to +3.6V Supply Voltage 5GHz Beam Steering Transmitter Small, 68-Pin Thin QFN Package (10mm x 10mm) Ordering Information PART TEMP RANGE PIN-PACKAGE MAX2850ITK+ -25C to +85C 68 Thin QFN-EP* *EP = Exposed pad. +Denotes a lead(Pb)-free/RoHS-compliant package. Typical Operating Circuit appears at end of data sheet. WiMax is a trademark of WiMax Forum. SPI is a trademark of Motorola, Inc. 19-5009 Rev 2 1/19MAX2850 5GHz, 4-Channel MIMO Transmitter Absolute Maximum Ratings V Pins to GND ...............................................-0.3V to +3.9V Digital Inputs: ENABLE, CS, CC RF Inputs Maximum Current: RXRF+, RXRF SCLK, DIN to GND ................................-0.3V to V + 0.3V CC to GND .............................................................. -1mA to +1mA Digital Outputs: DOUT, CLKOUT to GND .-0.3V to V + 0.3V CC RF Outputs: TXRF1+, TXRF1-, TXRF2+, TXRF2-, TXRF3+, Short-Circuit Duration TXRF3-, TXRF4+, TXRF4- to GND .......-0.3V to V + 0.6V Analog Outputs .................................................................. 10s CC Analog Inputs: TXBB1I+, TXBB1I-, TXBB1Q+, Digital Outputs ................................................................... 10s TXBB1Q-, TXBB2I+, TXBB2I-, TXBB2Q+,TXBB2Q-, RF Input Power ..............................................................+10dBm TXBB3I+, TXBB3I-, TXBB3Q+, TXBB3Q-, RF Output Differential Load VSWR ........................................6:1 TXBB4I+, TXBB4I-, TXBB4Q+, TXBB4Q-, PA DET1, Continuous Power Dissipation (T = +85C) A PA DET2, PA DET3, PA DET4, XTAL, 68-Pin Thin QFN (derate 29.4mW/C above +70C) ..2352mW XTAL CAP to GND ...............................-0.3V to V + 0.3V Operating Temperature Range ........................... -25C to +85C CC Analog Outputs: RXBBI+, RXBBI-, RXBBQ+, Junction Temperature ......................................................+150C RXBBQ-, RSSI, CLKOUT2, VCOBYP, CPOUT+, Storage Temperature Range ............................ -65C to +160C CPOUT-, PA BIAS1, PA BIAS2, Lead Temperature (soldering, 10s) .................................+300C PA BIAS3, PA BIAS4 to GND ..............-0.3V to V + 0.3V Soldering Temperature (reflow) .......................................+260C CC Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. CAUTION ESD SENSITIVE DEVICE DC Electrical Characteristics (Operating conditions, unless otherwise specified: V = 2.7V~3.6V, ENABLE set according to operating mode, CS = high, SCLK = CC DIN = low, transmitter in maximum gain, T = -25C to +85C. Power matching and termination for the differential RF output pins using A the Typical Operating Circuit. 100mV differential I and Q signals applied to I/Q baseband inputs of transmitters in transmit mode. RMS Typical values measured at V = 2.85V, T = +25C, LO frequency = 5.35GHz, T = +25C. Channel bandwidth is set to 40MHz. CC A A PA control pins open circuit, V is disconnected.) (Note 1) CC PA BIAS PARAMETERS CONDITIONS MIN TYP MAX UNITS Supply Voltage, V 2.7 3.6 V CC Shutdown mode T = +25C 10 A A XTAL oscillator, load = 10pF 3 Clock-out only mode TCXO input, load = 10k 10pF 7.4 11 Standby mode 60 89 One transmitter is on 188 235 Supply Current Transmit mode Four transmitters are on 505 661 mA Receive mode 135 174 One transmitter is on 214 261 Transmit calibration mode Four transmitters are on 532 686 Receive calibration mode 268 327 Rx I/Q Output Common-Mode 0.9 1.1 1.3 V Voltage Tx Baseband Input Common- 0.5 1.1 V Mode Voltage Operating Range Tx Baseband Input Bias Current Source current 10 20 A Maxim Integrated 2 www.maximintegrated.com