Rainbow Electronics MAX2769B - Manual

MAX2769B
Universal GPS Receiver
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Block Diagram
19-5875; Rev 1; 8/11
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to
www.maxim-ic.com/MAX2769B.related .
E V A L U A T I O N K I T A V A I L A B L E
General Description
The MAX2769B is a next-generation Global Navigation
Satellite System (GNSS) receiver covering GPS, GLONASS,
Galileo, and Compass navigation satellite systems on
a single chip. This single-conversion GNSS receiver is
designed to provide high performance for industrial and
automotive applications.
Designed on Maxim’s advanced, low-power SiGe BiCMOS
process technology, the MAX2769B offers the highest
performance and integration at a low cost. Incorporated
on the chip is the complete receiver chain, including a
dual-input LNA and mixer, followed by the image-rejected
filter, PGA, VCO, fractional-N frequency synthesizer,
crystal oscillator, and a multibit ADC. The total cascaded
noise figure of this receiver is as low as 1.4dB.
The MAX2769B completely eliminates the need for exter-
nal IF filters by implementing on-chip monolithic filters
and requires only a few external components to form a
com plete low-cost GPS RF receiver solution.
The MAX2769B is the most flexible receiver on the mar-
ket. The integrated delta-sigma fractional-N frequency
synthesizer allows programming of the IF frequency
within a ±30Hz (f
XTAL
= 32MHz) accuracy while operat-
ing with any reference or crystal frequencies that are
available in the host system. The ADC outputs CMOS
logic levels with 1 or 2 quantized bits for both I and Q
channels, or up to 3 quantized bits for the I channel. I and
Q analog outputs are also available.
The MAX2769B is packaged in a 5mm x 5mm, 28-pin thin
QFN package with an exposed paddle.
Applications
Automotive Navigation Systems
Location-Enabled Mobile Handsets
PNDs (Personal Navigation Devices)
Telematics (Asset Tracking, Inventory
Management)
Marine/Avionics Navigation
Software GPS
Laptops and Netbooks
Features
S AEC-Q100 Automotive Qualified
S GPS/GLONASS/Galileo/Compass Systems
S
40pF Output Clock Drive Capability
S No External IF SAW or Discrete Filters Required
S
Programmable IF Frequency
S Fractional-N Synthesizer with Integrated VCO
Supports Wide Range of Reference Frequencies
S
Dual-Input Uncommitted LNA for Separate Passive
and Active Antenna Inputs
S 1.4dB Cascade Noise Figure
S
Integrated Crystal Oscillator
S Integrated Active Antenna Sensor
S
2.7V to 3.3V Supply Voltage
S Small, 28-Pin, RoHS-Compliant, Thin QFN Lead-
Free Package (5mm x 5mm)
LNAOUT
V CC_RF MIXIN
LD
ANTFLAG
I0 Q0 Q1 I1 CLKOUT XTAL
LNA2
PGM
LNA1
CPOUT
V CC_VCO
SCLK
ANTBIAS
V
CC_ADC
12
10
9
24
26
11 25
27
N.C. SDATA 8 28
+
V CC_CP 13 23 V CC_IF
14 V CCD 22
19 17 16
3 5
18
4 6
15
7
20
2
21
1
N.C.
SHDN
CS
ADC ADC
FILTER
PLL
LNA2
LNA1
VCO
90
0
3-WIRE
INTERFACE
IDLE
MAX2769B
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.