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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 SFDRat fIN = 5.5MHz and fCLK= 45MHz. The analog I/Q input amplifiers are fully differential and accept 1.024VP-Pfull-scale signals. Typical I/Q channel matching is ±0.03° phase and ±0.01dB gain.

Features

1. Dual, 10-Bit, 45Msps Rx ADC and Dual, 10-Bit, 45Msps Tx DAC
2. Ultra-Low Power
(1) 84.6mW at fCLK= 45MHz, Fast Mode
(2) 77.1mW at fCLK= 45MHz, Slow Mode
(3) Low-Current Standby and Shutdown Modes
3. Programmable Tx DAC Common-Mode DC Level and I/Q Offset Trim
4. Excellent Dynamic Performance
(1) SNR = 54.2dB at fIN = 5.5MHz (Rx ADC)
(2) SFDR = 73.2dBc at fOUT= 2.2MHz (Tx DAC)
5. Three 12-Bit, 1µs Aux-DACs
6. 10-Bit, 333ksps Aux-ADC with 4:1 Input Mux and Data Averaging
7. Excellent Gain/Phase Match ±0.03° Phase, ±0.01dB Gain (Rx ADC) at fIN = 5.5MHz
8. Multiplexed Parallel Digital I/O
9. Serial-Interface Control
10. Versatile Power-Control Circuits, Shutdown, Standby, Idle, Tx/Rx Disable
11. Miniature 48-Pin Thin QFN Package (7mm x 7mm x 0.8mm)