MAX2742 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Single-Chip Global Positioning System Receiver Front-End

19-3469; Rev 0; 11/04
Single-Chip ^{EVAALVUAAILTAIOBNLEKIT} Global Positioning System
Receiver Front-End
General Description
The MAX2742 complete single-chip global positioning
system (GPS) RF front-end utilizes many innovative and
leading-edge RF CMOS design techniques. This high-
performance, state-of-the-art device consumes extreme-
ly low power and eliminates the need for costly SAW
and bulky discrete IF filters. The MAX2742 incorporates
a fully integrated low-noise amplifier (LNA) and mixer, IF
section, digital sampler, and local oscillator synthesizer.
The intended input signal for the MAX2742 is the L1
GPS signal 1.57542GHz. This device supports high-
accuracy output quantization, which delivers the best
performance obtainable for the GPS receiver. The
power consumption of the MAX2742 is as low as 32mW
at a +2.4V supply.
The MAX2742 is available in a space-saving 48-pin
TQFP package and is specified for the extended (-40°C
to +85°C) temperature range.
Applications
In-Vehicle Navigation Systems (IVNS)
Location-Based Services (PDAs and
Accessories)
Recreational Handheld/Walkie Talkies
Geographical Information Systems (GISs)
Telematics (Vehicle, Asset Tracking, and
Inventory Management)
Emergency Roadside Assistance
Emergency Response Systems
Digital Cameras/Camcorders
Consumer Electronics
Features
♦ Complete Single-Chip GPS Front-End Receiver
♦ Single-Ended or Differential Outputs at 1.023MHz
♦ Low 4.5dB Typical Noise Figure
♦ No External IF SAW or Discrete Filters Required
♦ Very Low 32mW Power Consumption at +2.4V
♦ Wide +2.4V to +3.6V Operational Supply Voltage
Range
♦ Extended -40°C to +85°C Temperature Range
Ordering Information
PART
TEMP RANGE
MAX2742ECM
-40°C to +85°C
*EP = Exposed paddle.
PIN-PACKAGE
48 TQFP-EP*
Block Diagram/
Pin Configuration
48 47 46 45 44 43 42 41 40 39 38 37
RBIAS 1
BIAS
CP
CBIAS 2
VDD 3
VDD 4
TCXO
BUFFER
PFD
DIV
GND 5
MAX2742
GND 6
CONTROL
BLOCK
36 I.C.
35 I.C.
34 I.C.
33 I.C.
32 VDD
31 DIN
RFIN 7
LNA
30 GND
GND 8
29 CLKOUT2
GND 9
28 DOUT
IFSEL 10
I.C. 11
VGA
COMP
AGC
27 I.C.
26 CLKOUT1
VDD 12
25 VDD
13 14 15 16 17 18 19 20 21 22 23 24
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