The MAX19711 is an ultra-low-power, highly integrated
mixed-signal analog front-end (AFE) ideal for CDMA
communication applications operating in full-duplex
(FD) mode. Optimized for high dynamic performance
and ultra-low power, the device integrates a dual 10-bit,
11Msps receive (Rx) ADC; dual 10-bit, 11Msps transmit
(Tx) DAC with CDMA 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 FD mode is 37.5mW/42.7mW
at a 4.915MHz/11MHz clock frequency.
The Rx ADCs feature 54.8dB SNR and 74.2dBc SFDR at
1.875MHz input frequency with an 11MHz 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 ±0.01dB gain.
The Tx DACs with CDMA lowpass filters feature -3dB
cutoff frequency of 1.3MHz and > 64dBc stopband
rejection at fIMAGE = 4.285MHz at fCLK = 4.915MHz. The
analog I-Q full-scale output voltage range is selectable at
±410mV or ±500mV differential. The output DC common-mode
voltage is selectable from 0.86V to 1.36V. The I/Q
channel offset is adjustable to optimize radio lineup sideband/carrier suppression. Typical I-Q channel matching
is ±0.03dB gain and ±0.07° phase.
Two independent 10-bit parallel, high-speed digital
buses used by the Rx ADC and Tx DAC allow full-duplex
operation for frequency-division duplex applications.
The Rx ADC and Tx DAC can be disabled
independently to optimize power management. A 3-wire
serial interface controls power-management modes, the
aux-DAC channels, and the aux-ADC channels.
The MAX19711 operates on a single 2.7V to 3.3V
analog supply and 1.8V to 3.3V digital I/O supply.
The MAX19711 is specified for the extended (-40°C to
+85°C) temperature range and is available in a 56-pin,
thin QFN package. The Selector Guide at the end of the
data sheet lists other pin-compatible versions in this AFE
family. For time-division duplex (TDD) applications, refer
to the MAX19705–MAX19708 AFE family of products.
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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