MAX2741 Просмотр технического описания (PDF) - Maxim Integrated
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MAX2741 Datasheet PDF : 13 Pages
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MAX2741
EVALUATION KIT AVAILABLE
Integrated L1-Band GPS Receiver
General Description
The MAX2741 L1-band GPS receiver IC offers a
high-performance, compact solution for mobile hand-
sets and PDA 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 second 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 TQ
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
Ordering Information
PART
MAX2741ETI
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
28 Thin QFN-EP*
Pin Configuration/Functional Diagram
mm x 5m
Applications
●● In-Vehicle Navigation Systems (IVNS)
●● Telematics (Vehicle and Asset Tracking, Inventory
Management)
●● 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
VCC1 1
28
27
26
25
24
23
22
∑
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
19-3559; Rev 1; 5/14
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