General Description

The MAX19707 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, 45Msps receive (Rx) ADC; dual, 10-bit, 45Msps 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 84.6mW at a 45MHz clock frequency.

The Rx ADCs feature 54.2dB SNR and 71.2dBc SFDR at fIN = 5.5MHz and fCLK = 45MHz. The analog I/Q input amplifiers are fully differential and accept 1.024VP-P full-scale signals. Typical I/Q channel matching is ±0.03° phase and ±0.01dB gain.

Features

♦ Dual, 10-Bit, 45Msps Rx ADC and Dual, 10-Bit,

   45Msps Tx DAC

♦ Ultra-Low Power

   84.6mW at fCLK = 45MHz, Fast Mode

   77.1mW at fCLK = 45MHz, Slow Mode

   Low-Current Standby and Shutdown Modes

♦ Programmable Tx DAC Common-Mode DC Level

   and I/Q Offset Trim

♦ Excellent Dynamic Performance

   SNR = 54.2dB at fIN = 5.5MHz (Rx ADC)

   SFDR = 73.2dBc 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

   ±0.03° 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 CPEs

   802.11a/b/g WLAN

   VoIP Terminals

   Portable Communication Equipment