MAX19712ETN datasheet(1/36 Pages) MAXIM

Part #	MAX19712ETN

Description	10-Bit, 22Msps, Full-Duplex Analog Front-End

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Manufacturer	MAXIM [Maxim Integrated Products]

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General Description

The MAX19712 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,

22Msps receive (Rx) ADC; dual 10-bit, 22Msps 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 50.4mW at a 22MHz clock frequency.

The Rx ADCs feature 54.7dB SINAD and 75.6dBc SFDR

at 5.5MHz input frequency with a 22MHz clock frequen-

cy. 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 feature 72.9dBc SFDR at fOUT = 2.2MHz

and fCLK = 22MHz. The analog I-Q full-scale output volt-

age range is ±400mV differential. The output DC com-

mon-mode voltage is from 0.89V to 1.36V. The I/Q

channel offset is adjustable to optimize radio lineup side-

band/carrier suppression. Typical I-Q channel matching

is ±0.01dB gain and ±0.1° 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 applica-

tions. 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 MAX19712 operates on a single 2.7V to 3.3V analog

supply and 1.8V to 3.3V digital I/O supply. The

MAX19712 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.

Applications

Features

♦ Dual 10-Bit, 22Msps Rx ADC and Dual 10-Bit,

22Msps Tx DAC

♦ Ultra-Low Power

50.4mW at fCLK = 22MHz, FD Mode

39.9mW at fCLK = 22MHz, Slow Rx Mode

33.9mW at fCLK = 22MHz, 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 = 54.8dB at fIN = 5.5MHz (Rx ADC)

SFDR = 72.9dBc at fOUT = 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

±0.01° Phase, ±0.01dB Gain (Rx ADC) at

fIN = 5.5MHz

♦ 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)

10-Bit, 22Msps, Full-Duplex

Analog Front-End

________________________________________________________________

Maxim Integrated Products

1

19-0528; Rev 0; 5/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

EVALUATION

KIT

AVAILABLE

Ordering Information

PART*

PIN-PACKAGE

PKG CODE

MAX19712ETN

56 Thin QFN-EP**

T5677-1

MAX19712ETN+

56 Thin QFN-EP**

T5677-1

*

All devices are specified over the -40°C to +85°C operating range.

**

EP = Exposed paddle.

+

Denotes lead-free package.

Functional Diagram and Selector Guide appear at end of

data sheet.

TOP VIEW

MAX19712

THIN QFN

15

17

16

18

19

20

21

22

23

24

25

26

27

28

AD2

AD3

AD4

AD5

AD6

AD7

AD8

AD9

OGND

OVDD

DA0

DA1

DA2

DA3

REFN

NOTE: THE PIN 1 INDICATOR IS “+” FOR LEAD-FREE DEVICES.

COM

REFIN

QDP

QDN

VDD

GND

IDP

IDN

VDD

DAC1

DAC2

DAC3

ADC1

48

47

46

45

44

43

54

53

56

55

52

51

50

49

1

2

3

4

5

6

7

8

9

10

11 121314

42 41 40 39 38 37 36 35 34 33 32 31 30 29

EXPOSED PADDLE (GND)

Pin Configuration

WCDMA Handsets

801.11a/b/g WLAN

RFID Readers

VoIP Terminals

Portable Communication

Equipment

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