MAX2769ETI+ Maxim Integrated Products, MAX2769ETI+ Datasheet

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MAX2769ETI+

Manufacturer Part Number
MAX2769ETI+
Description
RF Receiver Low-Power GPS and GL ONASS Receiver with
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX2769ETI+

Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX2769 is the industry’s first global navigation
satellite system (GNSS) receiver covering GPS,
GLONASS, and Galileo navigation satellite systems on a
single chip. This single-conversion, low-IF GNSS receiver
is designed to provide high performance for a wide range
of consumer applications, including mobile handsets.
Designed on Maxim’s advanced, low-power SiGe
BiCMOS process technology, the MAX2769 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 MAX2769 completely eliminates the need for external
IF filters by implementing on-chip monolithic filters and
requires only a few external components to form a com-
plete low-cost GPS receiver solution.
The MAX2769 is the most flexible receiver on the
market. The integrated delta-sigma fractional-N frequency
synthesizer allows programming of the IF frequency
within a ±40Hz accuracy while operating with any refer-
ence or crystal frequencies that are available in the
host system. The integrated ADC outputs 1 or 2 quan-
tized bits for both I and Q channels, or up to 3 quan-
tized bits for the I channel. Output data is available
either at the CMOS logic or at the limited differential
logic levels.
The MAX2769 is packaged in a compact 5mm x 5mm,
28-pin thin QFN package with an exposed paddle. The
part is also available in die form. Contact the factory for
further information.
19-0791; Rev 2; 6/10
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.
Location-Enabled Mobile Handsets
PNDs (Personal Navigation Devices)
PMPs (Personal Media Players)
PDAs (Personal Digital Assistants)
In-Vehicle Navigation Systems
Telematics (Asset Tracking, Inventory
Management)
Recreational/Marine Navigation/Avionics
Software GPS
Laptops and Ultra-Mobile PCs
Digital Still Cameras and Camcorders
________________________________________________________________ Maxim Integrated Products
General Description
Applications
Universal GPS Receiver
o GPS/GLONASS/Galileo Receivers
o No External IF SAW or Discrete Filters Required
o Programmable IF Frequency
o Fractional-N Synthesizer with Integrated VCO
o Dual-Input Uncommitted LNA for Separate
o 1.4dB Cascade Noise Figure
o Integrated Crystal Oscillator
o Integrated Active Antenna Sensor
o 10mA Supply Current in Low-Power Mode
o 2.7V to 3.3V Supply Voltage
o Small, 28-Pin, RoHS-Compliant, Thin QFN Lead-
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed paddle.
MAX2769ETI+
MAX2769E/W
TSENS
VCCIF
Supports Wide Range of Reference Frequencies
Passive and Active Antenna Inputs
Free Package (5mm x 5mm)
LNA2
LNA1
PGM
IDLE
N.C.
Pin Configuration/Block Diagram
PART
22
23
24
25
26
27
28
+
1
21
LNA2
LNA1
20
2
MAX2769
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
FILTER
19
3
Ordering Information
18
4
17
5
PIN-PACKAGE
28 Thin QFN-EP*
Dice (In Wafer Form)
16
6
VCO
Features
15
7
14
13
12
11
10
9
8
VCCD
VCCCP
CPOUT
VCCVCO
CS
SCLK
SDATA
1

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MAX2769ETI+ Summary of contents

Page 1

... Cascade Noise Figure o Integrated Crystal Oscillator o Integrated Active Antenna Sensor o 10mA Supply Current in Low-Power Mode o 2.7V to 3.3V Supply Voltage o Small, 28-Pin, RoHS-Compliant, Thin QFN Lead- Free Package (5mm x 5mm) PART MAX2769ETI+ MAX2769E/W + Denotes a lead(Pb)-free/RoHS-compliant package Exposed paddle. Pin Configuration/Block Diagram N.C. 22 Applications ...

Page 2

... Acti ve Antenna D etecti ent To asser TFLAG DIGITAL INPUT AND OUTPUT Measure at the SHDN pin Digital Input Logic-High Measure at the SHDN pin Digital Input Logic-Low Idle Mode is a trademark of Maxim Integrated Products, Inc. 2 _______________________________________________________________________________________ Operating Temperature Range ...........................-40°C to +85°C + 0.3V) Junction Temperature ......................................................+150°C CC Storage Temperature Range .............................-65° ...

Page 3

AC ELECTRICAL CHARACTERISTICS (MAX2769 EV kit 2.7V to 3.3V driven from a 50Ω source. All RF measurements are done in the analog output mode with ADC bypassed. PGA gain is set to 51dB gain by ...

Page 4

Universal GPS Receiver AC ELECTRICAL CHARACTERISTICS (continued) (MAX2769 EV kit 2.7V to 3.3V driven from a 50Ω source. All RF measurements are done in the analog output mode with ADC bypassed. PGA gain is set ...

Page 5

EV kit 2.7V to 3.3V driven from a 50Ω source. All RF measurements are done in the analog output mode with ADC bypassed. PGA gain is set to 51dB gain by serial-interface word GAININ ...

Page 6

Universal GPS Receiver (MAX2769 EV kit 2.7V to 3.3V driven from a 50Ω source. All RF measurements are done in the analog output mode with ADC bypassed. PGA gain is set to 51dB gain by ...

Page 7

EV kit 2.7V to 3.3V driven from a 50Ω source. All RF measurements are done in the analog output mode with ADC bypassed. PGA gain is set to 51dB gain by serial-interface word GAININ ...

Page 8

Universal GPS Receiver (MAX2769 EV kit 2.7V to 3.3V driven from a 50Ω source. All RF measurements are done in the analog output mode with ADC bypassed. PGA gain is set to 51dB gain by ...

Page 9

TOP VIEW 21 N. VCCIF 23 IDLE 24 LNA2 25 PGM 26 C0 LNA1 27 N. Table 1. Component List DESIGNATION QUANTITY C0 1 0.47nF AC-coupling capacitor C1 1 27pF PLL loop filter capacitor C2 ...

Page 10

Universal GPS Receiver PIN NAME Active Antenna Flag Logic Output. A logic-high indicates that an active antenna is connected to the 1 ANTFLAG ANTBIAS pin. 2 LNAOUT LNA Output. The LNA output is internally matched to 50Ω. 3 ANTBIAS Buffered ...

Page 11

Detailed Description Integrated Active Antenna Sensor The MAX2769 includes a low-dropout switch to bias an external active antenna. To activate the antenna switch output, set ANTEN in the Configuration 1 register to logic 1. This closes the switch that connects ...

Page 12

Universal GPS Receiver Table 2. Output Data Format SIGN/MAGNITUDE INTEGER VALUE 1b 1. 011 001 001 000 - 000 ...

Page 13

Figure 2. ADC Quantization Levels for 2- and 3-Bit Cases MSB is output at I1, the second bit is at I0, and the LSB is at Q1. Figure 2 illustrates the ADC quantization levels for ...

Page 14

Universal GPS Receiver ADCCLK_SEL REF/XTAL THROUGH PIN SERCLK_SEL REFDIV<1:0> Figure 3. DSP Interface Top-Level Connectivity and Control Signals ter. This selects between bit ; bit and bit 0 0 and bit , bit , bit , ...

Page 15

Preconfigured Device States When a serial interface is not available, the device can be used in preconfigured states that don’t require pro- gramming through the serial interface. Connecting the PGM pin to logic-high and SCLK, SDATA, and CS pins to ...

Page 16

Universal GPS Receiver Table 4. Serial-Interface Timing Requirements SYMBOL Falling edge rising edge of the first SCLK time. t CSS t Data to serial-clock setup time Data to clock hold time Serial clock ...

Page 17

Table 6. Configuration 1 (Address: 0000) DEFAULT DATA BIT LOCATION VALUE CHIPEN 27 1 IDLE 26 0 ILNA1 25:22 1000 ILNA2 21:20 10 ILO 19:18 10 IMIX 17:16 01 MIXPOLE 15 0 LNAMODE 14:13 00 MIXEN 12 1 ANTEN 11 ...

Page 18

Universal GPS Receiver Table 7. Configuration 2 (Address: 0001) DEFAULT DATA BIT LOCATION VALUE IQEN 27 0 GAINREF 26:15 170d — 14:13 00 AGCMODE 12:11 00 FORMAT 10:9 01 BITS 8:6 010 DRVCFG 5:4 00 LOEN 3 1 RESERVED 2 ...

Page 19

Table 8. Configuration 3 (Address: 0010) DEFAULT DATA BIT LOCATION VALUE GAININ 27:22 111010 FSLOWEN 21 1 HILOADEN 20 0 ADCEN 19 1 DRVEN 18 1 FOFSTEN 17 1 FILTEN 16 1 FHIPEN 15 1 — PGAIEN 13 ...

Page 20

Universal GPS Receiver Table 9. PLL Configuration (Address: 0011) DEFAULT DATA BIT LOCATION VALUE VCOEN 27 IVCO 26 — 25 REFOUTEN 24 — 23 REFDIV 22:21 11 IXTAL 20:19 01 XTALCAP 18:14 10000 LDMUX 13:10 0000 ICP 9 PFDEN 8 ...

Page 21

Table 10. PLL Integer Division Ratio (Address 0100) DEFAULT DATA BIT LOCATION VALUE NDIV 27:13 1536d RDIV 12:3 16d — 2:0 000 Table 11. PLL Division Ratio (Address 0101) DEFAULT DATA BIT LOCATION VALUE FDIV 27:8 80000h — 7:0 01110000 ...

Page 22

Universal GPS Receiver Applications Information The LNA and mixer inputs require careful consideration in matching to 50Ω lines. Proper supply bypassing, grounding, and layout are required for reliable perfor- mance from any RF circuit. Low-Power Operation The MAX2769 can be ...

Page 23

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 23 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products ...

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