MAX19705

19-3763; Rev 0; 8/05 KIT ATION EVALU E L B AVAILA 10-Bit, 7.5Msps, Ultra-Low-Power Analog Front-End General Description Features ♦ Dual 10-Bit, 7.5Msps Rx ADC and Dual 10-Bit, 7.5Msps Tx DAC ♦ Ultra-Low Power 28.2mW at fCLK = 7.5MHz, Fast Mode 21mW at fCLK = 7.5MHz, Slow Mode Low-Current Standby and Shutdown Modes ♦ Programmable Tx DAC Common-Mode DC Level and I/Q Offset Trim ♦ Excellent Dynamic Performance SNR = 55.1dB at fIN = 1.875MHz (Rx ADC) SFDR = 77.2dBc at fOUT = 620kHz (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, ±0.02dB Gain (Rx ADC) at fIN = 1.875MHz ♦ 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) MAX19705 The MAX19705 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, 7.5Msps receive (Rx) ADC; dual 10-bit, 7.5Msps 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 28.2mW at a 7.5MHz clock frequency. The Rx ADCs feature 55.1dB SNR and 73.4dBc SFDR at a 1.875MHz input frequency with a 7.5MHz clock frequency. The analog I/Q input...