19-0527; Rev 0; 5/06
10-Bit, 11Msps, Full-Duplex
Analog Front-End
General Description
Features
♦ Dual 10-Bit, 11Msps Rx ADC and Dual 10-Bit,
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 con-
trol; 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.
11Msps Tx DAC
♦ Ultra-Low Power
37.5mW/42.7mW at fCLK = 4.915MHz/11MHz,
FD Mode
24.3mW at fCLK = 11MHz, Slow Rx Mode
34.5mW at fCLK = 11MHz, Slow Tx Mode
Low-Current Standby and Shutdown Modes
♦ Integrated CDMA Filters with > 64dBc Stopband
Rejection
♦ Programmable Tx DAC Common-Mode DC Level
and I/Q Offset Trim
♦ Excellent Dynamic Performance
The Rx ADCs feature 54.8dB SNR and 74.2dBc SFDR at
1.875MHz input frequency with an 11MHz clock frequen-
cy. The analog I/Q input amplifiers are fully differential
SNR = 54.8dB at fIN = 1.875MHz (Rx ADC)
SFDR = 75dBc at fOUT = 620kHz (Tx DAC)
and accept 1.024V
full-scale signals. Typical I/Q
P-P
channel matching is 0.01° phase and 0.01dB gain.
♦ Three 12-Bit, 1µs Aux-DACs
♦ 10-Bit, 333ksps Aux-ADC with 4:1 Input Mux and
The Tx DACs with CDMA lowpass filters feature -3dB
cutoff frequency of 1.3MHz and > 64dBc stopband
Data Averaging
rejection at f
= 4.285MHz at f
= 4.915MHz. The
♦ Excellent Gain/Phase Match
0.01ꢀ Phase, 0.01dB Gain (Rx ADC) at
fIN = 1.87MHz
♦ Multiplexed Parallel Digital I/O
♦ Serial-Interface Control
IMAGE
CLK
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 side-
band/carrier suppression. Typical I-Q channel matching
is 0.03dB gain and 0.07° phase.
♦ Versatile Power-Control Circuits
Shutdown, Standby, Idle, Tx/Rx Disable
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.
♦ Miniature 56-Pin Thin QFN Package
(7mm x 7mm x 0.8mm)
Pin Configuration
TOP VIEW
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.
42 41 40 39 38 37 36 35 34 33 32 31 30 29
28
27
26
25
24
23
22
21
ADC1
DAC3
DA3
DA2
DA1
DA0
43
44
DAC2 45
DAC1 46
V
47
OV
DD
DD
IDN 48
IDP 49
GND 50
OGND
AD9
MAX19711
AD8
V
51
20 AD7
19 AD6
18 AD5
17 AD4
16 AD3
15 AD2
DD
Applications
Portable Communication
Equipment
QDN 52
QDP 53
CDMA Handsets
REFIN 54
COM 55
REFN 56
CDMA Data Cards
EXPOSED PADDLE (GND)
Ordering Information
1
2
3
4
5
6
7
8
9
10 11 12 13 14
PART*
PIN-PACKAGE
56 Thin QFN-EP**
56 Thin QFN-EP**
PKG CODE
T5677-1
THIN QFN
NOTE: THE PIN 1 INDICATOR IS “+” FOR LEAD-FREE DEVICES.
MAX19711ETN
MAX19711ETN+
T5677-1
Functional Diagram and Selector Guide appear at end of
data sheet.
*All devices are specified over the -40°C to +85°C operating range.
**EP = Exposed paddle. +Denotes lead-free package.
________________________________________________________________ Maxim Integrated Products
1
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.
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