MAX2741 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Integrated L1-Band GPS Receiver

19-3559; Rev 0; 1/05
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Integrated L1-Band GPS Receiver
General Description
The MAX2741 L1-band GPS receiver IC offers a high-
performance, compact solution for mobile handsets,
PDAs, and automotive applications. Total voltage gain
of 80dB and a 4.7dB cascaded noise figure can pro-
vide receiver sensitivity for applications requiring
-185dBW for indoor tracking solutions.
This dual-conversion receiver downconverts the
1575.42MHz GPS signal to a 37.38MHz first IF, and then
a 3.78MHz second IF. An integrated 2- or 3-bit ADC (1-
bit SIGN, 1- or 2-bit MAG selectable) samples the sec-
ond IF and outputs the digitized signals to the baseband
processor.
The integrated synthesizer offers the flexibility in fre-
quency planning to allow a single board design to be
employed for reference frequencies from 2MHz to
26MHz. The integrated reference oscillator allows either
TCXO or crystal operation.
The receiver runs from a 2.7V to 3.0V supply, and draws
only 30mA when active. It is offered in a 28-pin thin QFN
package, and is specified for -40°C to +85°C at 3V.
PIN ^{THIN Q}
0mm _{x 5.0m}
Applications
In-Vehicle Navigation Systems (IVNS)
Telematics (Vehicle and Asset Tracking,
Inventory Management)
Automotive Security
Emergency Response Systems
Emergency Road-Side Assistance
Location-Based Services/Internet (PDAs)
Digital Cameras/Camcorders
Recreational Handhelds/Walkie-Talkies
Geographical Information Systems (GIS)
Consumer Electronics (Location-Based Games)
Precision Timing
Features
♦ Supports All Popular Handset Reference
Frequencies Up to 26MHz
♦ 4.7dB Cascaded Noise Figure
♦ 80dB Cascaded Gain
♦ Tolerates -90dBm In-Band Jammer
♦ Tolerates +13dBm CDMA Out-of-Band Jammer at
Device Input
♦ Integrated Synthesizer and VCO
♦ Integrated 2- or 3-Bit ADC
♦ 50dB IF AGC Range
♦ Small 28-Pin Thin QFN Package
♦ SPI™ Control Interface
♦ Clock Output for Baseband Processor
SPI is a trademark of Motorola, Inc.
PART
MAX2741ETI
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
28 Thin QFN
Pin Configuration/
Functional Diagram
VCC1 1
28
27
26
25
24
23
22
Σ
MAX2741
21 SDO
N.C. 2
LNA
RFIN 3
1612.8MHz ⁹⁰ /2
VCC2 4
VCC3 5
VCC4 6
VCO
3225.6MHz
33.6MHz
0
/96
/16128
ADC
P.D.
200kHz
/R
/192
MUX
16.8MHz
20 N.C.
19 VCC5
18 GPSIF0
17 GPSIF1
16 GPSIF2
GND 7
SPI INTERFACE REF
OSC
15 GPSCLK
8
9
10
11
12
13
14
________________________________________________________________ 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.