MAX19708 Datasheet | Maxim Integrated

19-3764; Rev 0; 8/05 KIT ATION EVALU LE B A IL A AV 10-Bit, 11Msps, Ultra-Low-Power Analog Front-End Features - Dual 10-Bit, 11Msps Rx ADC and Dual 10-Bit, 11Msps Tx DAC - Ultra-Low Power 36.9m W at f CLK = 5.12MHz, Fast Mode 19.8m W at f CLK = 5.12MHz, Slow Mode Low-Current Standby and Shutdown Modes - Integrated TD-SCDMA Filters with > 55d B Stopband Rejection - Programmable Tx DAC mon-Mode DC Level and I/Q Offset Trim - Excellent Dynamic Performance SNR = 55d B at f IN = 1.87MHz (Rx ADC) SFDR = 73d Bc at f OUT = 620k Hz (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 ±0.08° Phase, ±0.02d B Gain (Rx ADC) at f IN = 1.87MHz - 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) General Description The MAX19708 is an ultra-low-power, mixed-signal analog front-end (AFE) designed for TD-SCDMA handsets and data cards. Optimized for high dynamic performance at ultra-low power, the device integrates a dual 10-bit, 11Msps receive (Rx) ADC; dual 10-bit, 11Msps transmit (Tx) DAC with TD-SCDMA baseband filters; 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 36.9m W at a 5.12MHz clock frequency. The Rx ADCs feature 55d B SNR and 77.4d Bc SFDR at a 1.87MHz input frequency with an 11MHz clock frequency. The analog I/Q input amplifiers are fully differential and accept 1.024V P-P full-scale signals. Typical I/Q channel matching is ±0.08° phase and ±0.02d B gain. The Tx DACs with TD-SCDMA lowpass filters feature -3d B cutoff frequency of 1.32MHz and > 55d B stopband rejection at f IMAGE = 4.32MHz. The analog I-Q full-scale output voltage range is selectable at ±410m V or ±500m V differential. The output DC mon-mode voltage is selectable from 0.9V to...