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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 fIN = 5.5MHz and fCLK = 45MHz. The analog I/Q
input amplifiers are fully differential and accept
1.024VP-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 fOUT = 2.2MHz
and fCLK = 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
Features
Dual, 10-Bit, 45Msps Rx ADC and Dual, 10-Bit,
45Msps Tx DAC
Ultra-Low Power
84.6mW at fCLK = 45MHz, Fast Mode
77.1mW at fCLK = 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 fIN = 5.5MHz (Rx ADC)
SFDR = 73.2dBc at fOUT = 2.2MHz (Tx DAC)
Three 12-Bit, 1s 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
fIN = 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)
MAX19707
10-Bit, 45Msps, Ultra-Low-Power
Analog Front-End
________________________________________________________________ Maxim Integrated Products
1
19-3826; Rev 1; 6/07
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.
EVALUATION
KIT
AVAILABLE
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.
Functional Diagram and Selector Guide appear at end of
data sheet.
D9
D8
D6
OVDD
D4
D3
D2
D0
D1
OGND
D5
D7
VDD
IDN
IDP
GND
VDD
QDN
QDP
REFN
EXPOSED PADDLE (GND)
REFIN
DAC1
COM
DAC2
37
38
39
40
41
42
43
44
45
46
47
48
12
34
5
67
89
10
24
23
22
21
20
19
18
17
16
15
14
13
ADC1
ADC2
V
DD
GND
V
DD
CS
SCLK
DIN
T/R
SHDN
DOUT
DAC3
THIN QFN
MAX19707
TOP VIEW
REFP
V
DD
IAP
IAN
GND
CLK
GND
V
DD
QAN
QAP
V
DD
GND
11 12
36 35 34 33 32 31 30 29 28 27 26 25
Pin Configuration
WiMAX CPEs
802.11a/b/g WLAN
VoIP Terminals
Portable Communication
Equipment