MAX19707 Datasheet, PDF (1/37 Pages) Maxim Integrated Products – 10-Bit, 45Msps, Ultra-Low-Power Analog Front-End

19-3826; Rev 1; 6/07
EVAALVUAAILTAIOBNLEKIT
10-Bit, 45Msps, Ultra-Low-Power
Analog Front-End
General Description
The MAX19707 is an ultra-low-power, mixed-signal ana-
log front-end (AFE) designed for power-sensitive com-
munication 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 typ-
ical 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 match-
ing 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 volt-
age 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 ana-
log 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.
Applications
WiMAX CPEs
VoIP Terminals
802.11a/b/g WLAN
Portable Communication
Equipment
Ordering Information
PART*
PIN-PACKAGE
PKG CODE
MAX19707ETM
48 Thin QFN-EP**
T4877-4
MAX19707ETM+ 48 Thin QFN-EP**
T4877-4
*All devices are specified over the -40°C to +85°C operating
range.
**EP = Exposed paddle.
+Denotes lead-free package.
Features
♦ 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)
Pin Configuration
TOP VIEW
36 35 34 33 32 31 30 29 28 27 26 25
DAC2 37
DAC1 38
V_DD 39
IDN 40
IDP 41
GND 42
V_DD 43
QDN 44
QDP 45
REFIN 46
COM 47
REFN 48
MAX19707
EXPOSED PADDLE (GND)
24 D9
23 D8
22 D7
21 D6
20 OV_DD
19 OGND
18 D5
17 D4
16 D3
15 D2
14 D1
13 D0
1 2 3 4 5 6 7 8 9 10 11 12
THIN QFN
Functional Diagram and Selector Guide appear at end of
data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.