MAX2821A

V_CC Pins to GND ...............................................-0.3V to +4.2V
RF Inputs: RX_RFP, RX_RFN to GND.........-0.3V to (V_CC + 0.3V)
RF Outputs: TX_RFP, TX_RFN to GND..................-0.3V to +4.2V
Baseband Inputs: TX_BBIP, TX_BBIN, TX_BBQP,
TX_BBQN to GND ......................................-0.3V to (V_CC + 0.3V)
Baseband Outputs: RX_BBIP, RX_BBIN, RX_BBQP,
RX_BBQN to GND.......................................-0.3V to (V_CC + 0.3V)
Analog Inputs: RX_AGC, TX_GC, TUNE, ROSCN,
ROSCP to GND ..........................................-0.3V to (V_CC + 0.3V)
Analog Outputs: PA_BIAS, CP_OUT, VREF
to GND.......................................................-0.3V to (V_CC + 0.3V)
Digital Inputs: RX_ON, TX_ON, SHDNB, CSB, SCLK,
DIN, RF_GAIN, RX_1K to GND.....................-0.3V to (V_CC + 0.3V)
Bias Voltages: RBIAS, BYP ..................................+0.9V to +1.5V
Short-Circuit Duration Digital Outputs: DOUT, RX_DET .........10s
RF Input Power: RX_RFN, RX_RFP...................................+10dBm
Continuous Power Dissipation (T_A = +70°C)
48-Lead QFN (derate 27.0mW/°C above +70°C)........2162mW
48-Lead Thin QFN (derate 38.5mW/°C
above +70°C)................................................................3077mW
Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature.......................................................+150°C
Storage Temperature Range ............................-65°C to +160°C
Lead Temperature (soldering, 10s) ..................................+300°C
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.

The MAX2820/MAX2820A and MAX2821/MAX2821A single-chip zero-IF transceivers are designed for the 802.11b (11Mbps) applications operating in the 2.4GHz to 2.5GHz ISM band. The transceivers are nearly identical, except the MAX2821 and MAX2821A also provide a low-power shutdown mode and an analog voltage reference output. The MAX2820A/ MAX2821A are cost-reduced versions, virtually identical in pinout and performance to the MAX2820/ MAX2821. The transceivers include all the circuitry required to implement an 802.11b RF-to-baseband transceiver solution, providing a fully integrated receive path, transmit path, VCO, frequency synthesis, and baseband/control interface. Only a PA, RF switch, RF BPF, and a small number of passive components are needed to form the complete radio front-end solution.

The MAX2820/MAX2820A and MAX2821/MAX2821A  ICs eliminate the need for external IF and baseband filters by utilizing a direct-conversion radio architecture and monolithic baseband filters for both receiver and transmitter. They are specifically optimized for 802.11b (11Mbps CCK) applications. The baseband filtering and Rx and Tx signal paths support the CCK modulation scheme for BER = 10-5 at the required sensitivity levels.

The MAX2820/MAX2820A and MAX2821/MAX2821A  devices are suitable for the full range of 802.11b data rates (1Mbps, 2Mbps, 5.5Mbps, and 11Mbps) and also the higher-rate 22Mbps PBCCTM standard. The MAX2820 and MAX2821 are available in a 7mm × 7mm 48-lead QFN package. The MAX2820, MAX2821, MAX2820A, and MAX2821A are available in a 48-lead thin QFN package.