MAX2838 19-1049 Rev 1 8/08 3.3GHz to 3.9GHz Wireless Broadband RF Transceiver General Description Features 3.3GHz to 3.9GHz Wide-Band Operation The MAX2838 direct-conversion, zero-IF, RF transceiv- er is designed specifically for 3.3GHz to 3.9GHz wire- Master-Slave Modes with Coherent LO for MIMO less broadband systems. The MAX2838 completely Complete RF Transceiver, and PA Driver integrates all circuitry required to implement the RF 0dBm Linear OFDM Transmit Power transceiver function, providing RF-to-baseband receive -70dBr Tx Spectral Emission Mask path, baseband-to-RF transmit path, VCO, frequency 2.8dB Rx Noise Figure synthesizer, and baseband/control interface. The Tx/Rx I/Q Error and LO Leakage Detection and device includes a fast-settling sigma-delta RF synthe- Adjustment sizer with smaller than 29Hz frequency steps. The Automatic Rx DC Offset Correction MAX2838 supports 2Tx, 2Rx MIMO applications with a Monolithic Low-Noise VCO with -39dBc Integrated master device providing coherent LO to the slave Phase Noise Programmable Rx I/Q Lowpass Channel Filters device. The transceiver IC also integrates circuits for on-chip DC-offset cancellation, I/Q error, and carrier- Programmable Tx I/Q Lowpass Anti-Aliasing Filter Sigma-Delta Fractional-N PLL with 29Hz Step Size leakage detection circuits. Only an RF bandpass filter 60dB Tx Gain Control Range with 1dB Step Size, (BPF), TCXO, RF switch, PA, and a small number of Digitally Controlled passive components are needed to form a complete 94dB Rx Gain Control Range with 2dB Step Size, wireless broadband RF radio solution. Digitally Controlled The MAX2838 completely eliminates the need for an 60dB Analog RSSI Instantaneous Dynamic Range external SAW filter by implementing on-chip monolithic 4-Wire SPI Digital Interface filters for both the receiver and transmitter. The base- I/Q Analog Baseband Interface band filters along with the Rx and Tx signal paths are Digital Tx/Rx/Shutdown Mode Control optimized to meet the stringent noise figure and lineari- Low-Power CLOCKOUT Mode ty specifications. The device supports up to 2048-FFT On-Chip Digital Temperature Sensor Readout OFDM and implements programmable channel filters +2.7V to +3.6V Transceiver Supply for 1.5MHz to 28MHz RF channel bandwidths. The Low-Power Shutdown Mode transceiver requires only 2s Tx-Rx switching time. The Small 48-Pin Thin QFN Package (6mm x 6mm x 0.8mm) IC is available in a small 48-pin thin QFN package mea- suring only 6mm x 6mm x 0.8mm. Applications Pin Configuration 802.16-2004/802.16d Fixed WiMAX 802.16e MIMO Mobile WiMAX 48 47 46 45 44 43 42 41 40 39 38 37 WiMAX Pico and Femto Basestations + NLOS Wireless Broadband Systems VCCRXLNA 1 36 RXBBQ+ GNDRXLNA 2 35 RXBBQ- B5 3 34 B6 RXRF+ 4 33 B7 WiMAX is a trademark of the WiMAX Forum. RXRF- 5 32 RSSI SPI is a trademark of Motorola, Inc. MAX2838 B4 6 31 DIN VCCTXPAD 7 30 DOUT B3 8 29 EXTVCO+ Ordering Information B2 9 28 EXTVCO- PART TEMP RANGE PIN-PACKAGE TXRF+ 10 27 VCCLO M AX2838E TM + T-40 C to + 85 C 48 TQ FN - E P * TXRF- 11 26 VCCVCO B1 12 25 VCOBYP *EP = Exposed paddle. +Denotes a lead-free package. 13 14 15 16 17 18 19 20 21 22 23 24 T = Tape and reel. 48 THIN QFN Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. PABIAS ENABLE VCCTMX RXTX CS VCCRXMX SCLK TXBBQ- TXBBQ+ CLKOUT TXBBI+ VCCDIG TXBBI- REFCLK VCCCP VCCRXFL RXHP GNDCP CPOUT+ VCCRXVGA CPOUT- RXBBI+ GNDVCO RXBBI-3.3GHz to 3.9GHz Wireless Broadband RF Transceiver ABSOLUTE MAXIMUM RATINGS V Pins to GND..................................................-0.3V to +3.6V Short-Circuit Duration CC RF Inputs: RXRF+, RXRF-, EXTVCO+, Analog Outputs: RXBBI+, RXBBI-, RXBBQ+, EXTVCO- to GND ................................................-0.3V to +3.6V RSSI, VCOBYP,RXBBQ-, CPOUT+, CPOUT-, RF Outputs: TXRF+, TXRF-, EXTVCO+, PABIAS, TXRF-, TXRF+ ......................................................10s EXTVCO- to GND ................................................-0.3V to +3.6V Digital Outputs: DOUT, CLKOUT .........................................10s Analog Inputs: TXBBI+, TXBBI-, TXBBQ+, RF Input Power: RXRF+, RXRF- .....................................+15dBm TXBBQ-, REFCLK to GND...................................-0.3V to +3.6V RF Output Differential Load VSWR: TXRF+, TXRF-.................6:1 Analog Outputs: RXBBI+, RXBBI-, RXBBQ+, Continuous Power Dissipation (T = +70C) A RXBBQ-, RSSI, VCOBYP, CPOUT+, CPOUT-, 48-Pin Thin QFN (derate 37mW/C above +70C) ...... > 2.96W PABIAS to GND...................................................-0.3V to +3.6V Operating Temperature Range ...........................-40C to +85C Digital Inputs: ENABLE, RXTX, CS, SCLK, Junction Temperature......................................................+150C DIN, RXHP B1B7 to GND ..................................-0.3V to +3.6V Storage Temperature Range .............................-65C to +160C Digital Outputs: DOUT, CLKOUT to GND .............-0.3V to +3.6V Lead Temperature (soldering, 10s) .................................+300C 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 (MAX2838 Evaluation Kit, V = 2.7V to 3.6V, T = -40C to +85C, ENABLE and RXTX set according to operating mode, CS = CC A high, SCLK = DIN = low, transmitter and receiver in maximum gain, no input signal at RF inputs, all RF inputs and outputs terminated into 50, receiver baseband outputs are open. 90mV differential I and Q signals (1MHz) applied to I and Q baseband inputs of RMS transmitter in transmit mode, all registers set to recommended settings and corresponding test mode, unless otherwise noted. Typical values are at V = 2.8V, f = 3.6GHz, and T = +25C, unless otherwise noted.) (Note 1) CC LO A PARAMETERS CONDITIONS MIN TYP MAX UNITS Supply Voltage V 2.7 2.8 3.6 V CC S hutdow n m od e T = +25C 12 A A Single configuration 35 52 Standby mode, see Tables MIMO master configuration 44 1 and 2 MIMO slave configuration 11 Single configuration 103 133 Rx mode, see MIMO master configuration 112 Tables 1 and 2 MIMO slave configuration 80 Single configuration 152 186 Supply Current Tx mode, see mA MIMO master configuration 160 Tables 1 and 2 MIMO slave configuration 128 Single configuration 142 182 Rx calibration mode, see MIMO master configuration 151 Tables 1 and 2 MIMO slave configuration 119 Single configuration 111 145 Tx calibration mode, see MIMO master configuration 120 Tables 1 and 2 MIMO slave configuration 88 D9:D8 = 00 in A4:A0 = 00100 0.8 1.0 1.2 D9:D8 = 01 in A4:A0 = 00100 1.1 Rx I/Q Output Common-Mode V Voltage D9:D8 = 10 in A4:A0 = 00100 1.2 D9:D8 = 11 in A4:A0 = 00100 1.35 2 MAX2838