MAX2769C Datasheet, PDF (1/29 Pages) Maxim Integrated Products – Universal GNSS Receiver

EVALUATION KIT AVAILABLE
MAX2769C
Universal GNSS Receiver
General Description
The MAX2769C is a next-generation Global Navigation
Satellite System (GNSS) receiver covering L1/E1, B1,
G1 bands for GPS, Galileo, BeiDou, and GLONASS
satellite systems on a single chip. This single-conversion
GNSS receiver is designed to provide high performance
for industrial and wide range of consumer applications,
including mobile handsets.
Designed on Maxim’s advanced, low-power SiGe BiCMOS
process technology, the MAX2769C 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-rejection
filter, Programmable Gain Amplifier (PGA) and a multibit
ADC. The total cascaded noise figure of this receiver is
as low as 1.4dB. In addition, the device includes an
integrated VCO, a crystal oscillator, a fractional-N
frequency synthesizer to program the LO frequency using
different reference frequencies.
The MAX2769C has the option to select one of the two
LNAs for seperate Active and Passive Antenna inputs.
LNA1 can be used with Passive Antenna input and LNA2
can be used for Active antenna input. Also, the MAX2769C
completely eliminates the need for external IF filters by
implementing on-chip monolithic filters and requires only
a few external components to form a complete low-cost
GPS RF receiver solution. Moreover, the device has the
flexibility to configure the IF filter for various center
frequencies and bandwidths using the SPI Interface.
The device is the most flexible receiver on the market.
The integrated delta-sigma fractional-N frequency
synthesizer allows programming of the IF frequency
within a ±30Hz (When f_XTAL ≤ 32MHz) accuracy while
operating 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
which will bypass the on-chip ADCs.
The MAX2769C is packaged in a 5mm x 5mm, 28-pin thin
QFN package with an exposed paddle.
Ordering Information appears at end of data sheet.
Benefits and Features
●● GPS/GLONASS/Galileo/BeiDou Systems
●● Dual-Input Selectable LNA for Separate Passive and
Active Antenna Inputs
●● 1.4dB Cascaded Noise Figure and 110dB of Cascaded
Gain with Gain Control Range of 59dB From PGA
●● Integrated Active Antenna Sensor
●● Fractional-N Synthesizer with Integrated VCO
●● No External IF SAW or Discrete Filters Required
●● Programmable IF Frequency
●● Programmable 2.5MHz, 4.2MHz, 9.66MHz IF
Bandwidth and 9MHz ZIF LPF BW
●● 8 Preconfigured Device States When No SPI Available
●● 40pF Output Clock Drive Capability
●● 28-Pin Thin QFN Package (5mm x 5mm)
●● Available in AEC-Q100 Automotive-Qualified Version
(MAX2769B)
Applications
●● Navigation Systems, Marine/Avionics Navigation
●● Location-Enabled Mobile Handsets
●● PNDs (Personal Navigation Devices)
●● Telematics (Asset Tracking, Inventory Management)
●● Software GPS
●● Laptops and Netbooks
●● In-Vehicle Navigation Systems
●● Digital Still Cameras and Camcorders
Block Diagram
N.C. 22
VCC_IF 23
IDLE 24
LNA2 25
PGM 26
LNA1 27
21
20
19
18
17
MAX2769C
PGA
PGA
FILTER
LNA2
16
15
/4, /2,
/1, x 2
BUFFER
VCO
14 VCCD
13 VCC_CP
12 CPOUT
11 VCC_VCO
10 CS
LNA1
3-WIRE
INTERFACE
9 SCLK
N.C. 28 ₊
1
2
3
4
5
6
8 SDATA
7
19-8634; Rev 1; 10/16