General Description
The MAX19706 is an ultra-low-power, mixed-signal analog front-end (AFE) designed for power-sensitive communication equipment. Optimized for high dynamic performance at ultra-low power, the device integrates a dual, 10-bit, 22Msps receive (Rx) ADC; dual, 10-bit, 22Msps transmit (Tx) DAC; three fast-settling 12-bit aux DAC channels for ancillary RF front-end control; and a 10-bit, 333ksps housekeeping aux-ADC. The typical operating power in Tx-Rx FAST mode is 49.5mW at a 22MHz clock frequency.
The Rx ADCs feature 54.6dB SNR and 75.6dBc SFDR at a 5.5MHz input frequency with a 22MHz clock frequency. The analog I/Q input amplifiers are fully differential and accept 1.024VP-P full-scale signals. Typical I/Q channel matching is ±0.12° phase and ±0.01dB gain.

FEATUREs
♦ Dual, 10-Bit, 22Msps Rx ADC and Dual, 10-Bit,
   22Msps Tx DAC
♦ Ultra-Low Power
   49.5mW at fCLK = 22MHz, Fast Mode
   39.3mW at fCLK = 22MHz, Slow Mode
   Low-Current Standby and Shutdown Modes
♦ Programmable Tx DAC Common-Mode DC Level
   and I/Q Offset Trim
♦ Excellent Dynamic Performance
   SNR = 54.6dB at fIN = 5.5MHz (Rx ADC)
   SFDR = 72.6dBc at fOUT = 2.2MHz (Tx DAC)
♦ Three 12-Bit, 1µs Aux-DACs
♦ 10-Bit, 333ksps Aux-ADC with 4:1 Input Mux and
   Data Averaging Mode
♦ Excellent Gain/Phase Match
   ±0.12° Phase, ±0.01dB Gain (Rx ADC) at
   fIN = 5.5MHz
♦ Multiplexed Parallel Digital I/O
♦ Serial-Interface Control
♦ Versatile Power-Control Circuits
   Shutdown, Standby, Idle, Tx/Rx Disable
♦ Miniature 48-Pin Thin QFN Package
   (7mm x 7mm x 0.8mm)

APPLICATIONs
   WiMAX(SM) and Wi-Bro CPEs
   802.11a/b/g WLAN
   VoIP Terminals
   Portable Communication Equipment