Rainbow Electronics MAX2769B User Manual

Max2769b universal gps receiver, Block diagram, General description

Advertising
background image

MAX2769B

Universal GPS Receiver

����������������������������������������������������������������� Maxim Integrated Products 1

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.

Advertising
Table of contents