General Description
The MAX19712 is an ultra-low-power, highly integrated mixed-signal analog front-end (AFE) ideal for wideband communication applications operating in full-duplex (FD) mode. Optimized for high dynamic performance and 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 FD mode is 50.4mW at a 22MHz clock frequency.
The Rx ADCs feature 54.7dB SINAD and 75.6dBc SFDR at 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 ±0.01° phase and ±0.01dB gain.

Features
♦ Dual 10-Bit, 22Msps Rx ADC and Dual 10-Bit,
   22Msps Tx DAC
♦ Ultra-Low Power
   50.4mW at fCLK = 22MHz, FD Mode
   39.9mW at fCLK = 22MHz, Slow Rx Mode
   33.9mW at fCLK = 22MHz, Slow Tx Mode
   Low-Current Standby and Shutdown Modes
♦ Programmable Tx DAC Common-Mode DC Level
   and I/Q Offset Trim
♦ Excellent Dynamic Performance
   SNR = 54.8dB at fIN = 5.5MHz (Rx ADC)
   SFDR = 72.9dBc 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
♦ Excellent Gain/Phase Match
   ±0.01° 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 56-Pin Thin QFN Package
   (7mm x 7mm x 0.8mm)

Applications
   WCDMA Handsets
   801.11a/b/g WLAN
   RFID Readers
   VoIP Terminals
   Portable Communication Equipment