MAX19710 10-Bit, 7.5Msps, Full-Duplex, Analog Front-End

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The MAX19710 is an ultra-low-power, highly integrated mixed-signal analog front-end (AFE) ideal for wideband communication applications operating in full-duplex (FD) mode. Optimized for high dynamic performance and 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 FD mode is 30mW at a 7.5MHz clock frequency.

The Rx ADCs feature 54.8dB SINAD and 79.8dBc SFDR at 3.3MHz input frequency with a 7.5MHz 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 ±0.01° phase and ±0.01dB gain.

The Tx DACs feature 73.8dBc SFDR at f_OUT = 620kHz and f_CLK = 7.5MHz. The analog I-Q full-scale output voltage range is ±400mV differential. The output DC common- mode voltage is from 0.89V to 1.36V. The I/Q channel offset is adjustable to optimize radio lineup sideband/ carrier suppression. Typical I-Q channel matching is ±0.01dB gain and ±0.15° 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 MAX19710 operates on a single 2.7V to 3.3V analog supply and 1.8V to 3.3V digital I/O supply. The MAX19710 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.

Key Features

Applications/Uses

	Dual 10-Bit, 7.5Msps Rx ADC and Dual 10-Bit, 7.5Msps Tx DAC
	Ultra-Low Power 30mW at f_CLK = 7.5MHz, FD Mode 21.3mW at f_CLK = 7.5MHz, Slow Rx Mode 21.9mW at f_CLK = 7.5MHz, Slow Tx Mode Low-Current Standby and Shutdown Modes
	Programmable Tx DAC Common-Mode DC Level and I/Q Offset Trim
	Excellent Dynamic Performance SNR = 54.9dB at f_IN = 3.3MHz (Rx ADC) SFDR = 73.8dBc at f_OUT = 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, ±0.01dB Gain (Rx ADC) at f_IN = 1.8MHz
	Multiplexed Parallel Digital I/O
	Serial-Interface Control
	Versatile Power-Control Circuits Shutdown, Standby, Idle, Tx/Rx Disable
	Miniature 56-Pin Thin QFN Package (7mm x 7mm x 0.8mm)

	Broadband Access Radio
	Portable Communication Equipment
	Private Mobile Radio

Key Specifications: Fast CODECs / Analog Front-End (AFE)

Part Number

ADC Input Channels

ADC Conv. Speed (Msps)

SNR@f_in (dB)

DAC Resolution (Bits)

DAC Output Channels

DAC Speed (Msps)

SFDR @ f_OUT (dBc)

THD@f_OUT (dBc)

Noise Spectral Density @ f_out (dBFS/Hz)

Data Bus Interface

Reference Voltage (V)

EV-Kit

Supply Voltage (V)

RoHS Available

Package

Operating Temp. Range (°C)

Price^**

MAX19710

7.5

54.8 @ 1.875MHz

7.5

73.8 @ 620kHz

-72.2 @ 620kHz

-120 @ 620kHz

Multiplexed
Parallel

Int/Ext

Yes

1.8
2.7 to 3.3

Yes

THIN QFN/56

-40 to +85

$8.35 @ 1k

See All Fast CODECs / Analog Front-End (AFE) (15)

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.