MAX19705 Datasheet | Maxim Integrated

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 28.2m W at f CLK = 7.5MHz, Fast Mode 21m W at f CLK = 7.5MHz, Slow Mode Low-Current Standby and Shutdown Modes - Programmable Tx DAC mon-Mode DC Level and I/Q Offset Trim - Excellent Dynamic Performance SNR = 55.1d B at f IN = 1.875MHz (Rx ADC) SFDR = 77.2d 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 ±0.01° Phase, ±0.02d B Gain (Rx ADC) at f IN = 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) The MAX19705 is an ultra-low-power, mixed-signal analog front-end (AFE) designed for power-sensitive munication 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 28.2m W at a 7.5MHz clock frequency. The Rx ADCs feature 55.1d B SNR and 73.4d Bc SFDR at a 1.875MHz input frequency with a 7.5MHz 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 ±0.02d B gain. The Tx DACs feature 77.2d Bc SFDR at f OUT = 620k Hz and f CLK = 7.5MHz. The analog I/Q full-scale output voltage is ±400m V differential. The Tx DAC monmode DC level is programmable from 0.9V to 1.35V. The I/Q channel offset is adjustable. The typical I/Q channel matching is ±0.03d B gain and ±0.08° phase. The Rx ADC and Tx DAC share a single, 10-bit...