MAX19707 10-Bit, 45Msps, Ultra-Low-Power Analog Front-End

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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 SFDR at f_IN = 5.5MHz and f_CLK = 45MHz. The analog I/Q input amplifiers are fully differential and accept 1.024V_P-P full-scale signals. Typical I/Q channel matching is ±0.03° phase and ±0.01dB gain.

The Tx DACs feature 73.2dBc SFDR at f_OUT = 2.2MHz and f_CLK = 45MHz. The analog I/Q full-scale output voltage is ±400mV differential. The Tx DAC common-mode DC level is programmable from 0.71V to 1.05V. The I/Q channel offset is programmable to optimize radio lineup sideband/carrier suppresion. The typical I/Q channel matching is ±0.01dB gain and ±0.07° phase.

The Rx ADC and Tx DAC share a single, 10-bit parallel, high-speed digital bus allowing half-duplex operation for time-division duplex (TDD) applications. A 3-wire serial interface controls power-management modes, the aux-DAC channels, and the aux-ADC channels.

The MAX19707 operates on a single 2.7V to 3.3V analog supply and 1.8V to 3.3V digital I/O supply. The MAX19707 is specified for the extended (-40°C to +85°C) temperature range and is available in a 48-pin, thin QFN package. The Selector Guide at the end of the data sheet lists other pin-compatible versions in this AFE family.

Key Features

Applications/Uses

Dual, 10-Bit, 45Msps Rx ADC and Dual, 10-Bit, 45Msps Tx DAC
Ultra-Low Power
- 84.6mW at f_CLK = 45MHz, Fast Mode
- 77.1mW at f_CLK = 45MHz, Slow Mode
- Low-Current Standby and Shutdown Modes
Programmable Tx DAC Common-Mode DC Level and I/Q Offset Trim
Excellent Dynamic Performance
- SNR = 54.2dB at f_IN = 5.5MHz (Rx ADC)
- SFDR = 73.2dBc at f_OUT = 2.2MHz (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
- ±0.03° Phase, ±0.01dB Gain (Rx ADC) at f_IN = 5.5MHz
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)

	802.11a/b/g WLAN
	Portable Communication Equipment
	VoIP Terminals
	WiMAX CPEs

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

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX19707

54.2 @ 5.5MHz

73.2 @ 2.2MHz

-71 @ 2.2MHz

-130.6 @ 2.2MHz

Multiplexed
Parallel

Int/Ext

Yes

1.8
2.7 to 3.3

Yes

THIN QFN/48

-40 to +85

$9.35 @ 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.