MAX2831/MAX2832 19-0363 Rev 2 3/11 2.4GHz to 2.5GHz 802.11g/b RF Transceivers with Integrated PA General Description Features The MAX2831/MAX2832 direct conversion, zero-IF, RF 2.4GHz to 2.5GHz ISM Band Operation transceivers are designed specifically for 2.4GHz to IEEE 802.11g/b Compatible (54Mbps OFDM and 2.5GHz 802.11g/b WLAN applications. The MAX2831 11Mbps CCK) completely integrates all circuitry required to implement Complete RF Transceiver, PA, and Crystal the RF transceiver function, providing an RF power Oscillator (MAX2831) amplifier (PA), RF-to-baseband receive path, baseband- to-RF transmit path, VCO, frequency synthesizer, crystal Best-in-Class Transceiver Performance oscillator, and baseband/control interface. The MAX2832 62mA Receiver Current integrates the same functional blocks except for the PA. 2.6dB Rx Noise Figure Both devices include a fast-settling sigma-delta RF syn- -76dBm Rx Sensitivity (54Mbps OFDM) thesizer with smaller than 20Hz frequency steps and a No I/Q Calibration Required digitally tuned crystal oscillator allowing use of a low-cost 0.1dB/0.35 Rx I/Q Gain/Phase Imbalance crystal. The devices also integrate on-chip DC-offset 33dB RF and 62dB Baseband Gain Control cancellation and I/Q errors and carrier leakage-detection Range circuits. Only an RF bandpass filter (BPF), crystal, RF 60dB Range Analog RSSI per RF Gain Setting switch, and a small number of passive components are Fast Rx I/Q DC-Offset Settling needed to form a complete 802.11g/b WLAN RF front- Programmable Baseband Lowpass Filter end solution. 20-Bit Sigma-Delta Fractional-N PLL with The MAX2831/MAX2832 completely eliminate the need < 20Hz Step Size for an external SAW filter by implementing on-chip mono- Digitally Tuned Crystal Oscillator lithic filters for both the receiver and transmitter. The +18.5dBm Transmit Power (5.6% EVM with baseband filters are optimized to meet the IEEE 802.11g 54Mbps OFDM) standard and proprietary turbo modes up to 40MHz 31dB Tx Gain Control Range channel bandwidth. These devices are suitable for the full Integrated Power Detector (MAX2831) range of 802.11g OFDM data rates (6Mbps to 54Mbps) Serial or Parallel Gain-Control Interface and 802.11b QPSK and CCK data rates (1Mbps to > 40dB Tx Sideband Suppression without 11Mbps). The ICs are available in a small, 48-pin TQFN Calibration package measuring only 7mm x 7mm x 0.8mm. Tx/Rx I/Q Error Detection Applications Transceiver Operates from +2.7V to +3.6V Wi-Fi, PDA, VOIP, and Cellular Handsets PA Operates from +2.7V to +4.2V (MAX2831) Wireless Speakers and Headphones Low-Power Shutdown Mode General 2.4GHz ISM Radios Small 48-Pin TQFN Package (7mm x 7mm x 0.8mm) Ordering Information PART TEMP RANGE PIN-PACKAGE M A X28 3 1 E TM + T-40 C to +85 C 48 TQFN-EP* M A X28 3 2 E TM+ T-40 C to +85 C 48 TQFN-EP* *EP = Exposed pad. +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Pin Configuration appears at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE2.4GHz to 2.5GHz 802.11g/b RF Transceivers with Integrated PA ABSOLUTE MAXIMUM RATINGS V , V and TXRF to GND ....................-0.3V to +4.5V RF Input Power...............................................................+10dBm CCTXPA CCPA V , V , V , V , V , V , Continuous Power Dissipation (T = +70C) CCLNA CCTXMX CCPLL CCCP CCXTAL CCVCO A V , V , and V to GND....-0.3V to +3.9V 48-Pin TQFN (derates 27.8mW/C above +70C) ..........2.22W CCRXVGA CCRXFL CCRXMX B6, B7, B3, B2, SHDN, B5, CS, SCLK, DIN, B1, TUNE, B4, Operating Temperature Range ...........................-40C to +85C TXBBI , TXBBQ , RXHP, RXTX, RXBBI , RXBBQ , RSSI, Junction Temperature......................................................+150C BYPASS, CPOUT, LD, CLOCKOUT, XTAL, CTUNE, RXRF to Storage Temperature Range .............................-65C to +160C GND .......................................-0.3V to (Operating V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C CC RXBBI , RXBBQ , RSSI, BYPASS, CPOUT, LD, CLOCKOUT Soldering Temperature (reflow) .......................................+260C Short-Circuit Duration ..........................................................10s 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 (MAX2831 EV kit: V = 2.7V to 3.6V, V = V = 2.7V to 4.2V, T = -40C to +85C, Rx set to the maximum gain. CS = CC CCPA CCTXPA A high, RXHP = SCLK = DIN = low, RSSI and clock output buffer are off, no signal at RF inputs, all RF inputs and outputs terminated into 50, receiver baseband outputs are open. 100mV differential I and Q signals (54Mbps IEEE 802.11g OFDM) applied to I/Q RMS baseband inputs of transmitter in transmit mode, f = 40MHz, and registers set to recommended settings and corresponding test REF mode, unless otherwise noted. Typical values are at V = 2.8V, V = 3.3V, and T = +25C, LO frequency = 2.437GHz, unless CC CCPA A otherwise noted. RF inputs/outputs specifications are referenced to device pins and do not include 1dB loss from EV kit PCB, balun, and SMA connectors.) (Note 1) PARAMETERS CONDITIONS MIN TYP MAX UNITS V 2.7 3.6 CC Supply Voltage V V , V 2.7 4.2 CCPA CCTXPA S hutdow n mod e, B7: B1 = 00 00000, T = +25C 20 A A r eferen ce oscill ato r no t appl i ed T = +25C 28 35 A Standby mode T = -40C to +85C 35 A T = +25C 62 78 Supply Current A Rx mode T = -40C to +85C 82 A MAX2831, transmit section 82 104 mA Tx mode, T = +25C, A V = 2.8V, V = M AX 2831, PA, P = + 18.2dB m 209258 CC CCPA OUT 3.3V, (Note 2) MAX2832 86 Rx calibration mode T = +25C 101 A Tx calibration mode T = +25C 78 A Rx I/Q Output Common-Mode T = +25C at default common-mode setting 0.98 1.2 1.33 V A Voltage T = -40C (relative to T = +25C) -17 Rx I/Q Output Common-Mode A A mV Voltage Variation T = +85C (relative to T = +25C) 15 A A Tx Baseband Input Common- DC-coupled 0.9 1.3 V Mode Voltage Operating Range Tx Baseband Input Bias Current Source current 22 A 2 MAX2831/MAX2832