GPS LSI. CXD2951GA-4 Datasheet

CXD2951GA-4 LSI. Datasheet pdf. Equivalent


Sony Corporation CXD2951GA-4
www.DataSheet4U.com
Single Chip GPS LSI
CXD2951GA-4
Description
The CXD2951GA-4 is a dedicated single chip LSI
for the GPS (Global Positioning System), satellite-
based location measurement system. This LSI
enables the configuration of a single chip system
providing a cost-effective, low-power solution.
Compared with conventional methods, position
detection time and sensitivity are substantially
improved with the use of an advanced signal
processing scheme. With the integration of both the
Radio and baseband blocks into a single CMOS IC,
the CXD2951GA-4 is ideal for use in automotive,
cellular handset, handheld navigation, mobile
computing and other location-based applications.
Features
WAAS support
12-channel GPS receiver capable of simultaneously
receiving 12 satellites
Reception frequency: 1575.42MHz
(L1 band, CA code)
Reference clock (TCXO) frequency:
18.414MHz (GPS, Sony standard),
The unique frequency of major applications is available,
such as GSM and W-CDMA. (optional)
13.000MHz (GSM),
14.400MHz (CDMA),
16.368MHz (GPS),
19.800MHz (PDC/CDMA),
26.000MHz (GSM)
32 bits RISC CPU (ARM7TDMI)
288K-bytes Program ROM
72K-bytes Data RAM
Power is supplied only to 8K-byte Data RAM while
in backup mode.
System power management
1-channel UART
Internal RTC (Real Time Clock)
10-bit successive approximation system A/D
converter
All-in-view positioning
Communication format: Supports NMEA-0183 (Ver
3.01)
1 PPS output
176 pin LFLGA (Plastic)
Radio
Image Rejection Mixer
VCO Tank
IF Filters
Structure
Silicon gate CMOS IC
Absolute Maximum Ratings
Supply voltage I/O IOVDD
Supply voltage core CVDD
Supply voltage radio VDD
Input voltage
VI
Output voltage
VO
Operating temperature Topr
Storage temperature Tstg
–0.5 to +4.6
–0.5 to +2.5
–0.5 to +2.5
–0.5 to +6
–0.5 to +6
–40 to +85
–50 to +150
V
V
V
V
V
°C
°C
Recommended Operating Conditions
Supply voltage I/O IOVDD 3.0 to 3.6
V
Under operation with internal ROM, using no
external expansion bus:
IOVDD 2.6 to 3.6
Under operation in backup mode:
V
BKUPIOVDD 2.5 (Min.) V
Supply voltage core CVDD 1.62 to 1.98 V
Supply voltage radio VDD 1.62 to 1.98 V
Operating temperature Topr –40 to +85 °C
Input/Output Pin Capacitance (Baseband)
Input capacitance
CIN
9 (Max.)
Output capacitance COUT 11 (Max.)
I/O capacitance
CI/O 11 (Max.)
pF
pF
pF
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E04Z13


CXD2951GA-4 Datasheet
Recommendation CXD2951GA-4 Datasheet
Part CXD2951GA-4
Description Single Chip GPS LSI
Feature CXD2951GA-4; www.DataSheet4U.com CXD2951GA-4 Single Chip GPS LSI Description The CXD2951GA-4 is a dedicated sing.
Manufacture Sony Corporation
Datasheet
Download CXD2951GA-4 Datasheet




Sony Corporation CXD2951GA-4
CXD2951GA-4
Performance
Baseband
Tracking sensitivity: –152dBm (average) or less
Acquisition sensitivity: –139dBm (average) or less in Normal mode
Reference data using the Sony's reference board when using both an antenna of 0dBi and a RF amplifier
with NF 2dB, 25dB gain.
TTFF (Time to First Fix):
Time until initial position measurement after power-on with the following conditions:
Cold Start (without both ephemeris and almanac time): 50s (average) / 60s (95% possibility)
Warm Start (without ephemeris but with almanac time): 35s (average) / 40s (95% possibility)
Hot Start (with both ephemeris and almanac time): 2s (minimum) / 6s (95% possibility)
Reference data with elevation angle of 5° or more and no interception environment with satellite powers
–130dBm.
Note) "95% possibility" means "position time with 95% possibility".
Positioning accuracy:
2DRMS: approx. 2m
Reference data with elevation angle of 5° or more and no interception environment with satellite powers
–130dBm.
Measurement data update time: 1s
Power consumption:
50mW (average) while position calculating with tracking satellites in low power mode
120mW (average) while position calculating with acquiring and tracking satellites
Reference data using the Sony's reference board when the reference clock input is 18.414MHz, and its
amplitude is 3.3V swing.
1PPS output
1µs or less precision, 1PPS outputs from ECLKOUT (Pin 97).
Note) These values are not guaranteed, depending on the conditions.
Radio
Total Gain (typ.):
100dB
Noise figure (typ.):
8dB
Synthesizer phase noise (typ.):
–70dBc/Hz (10kHz)
–80dBc/Hz (100kHz)
PLL spurious (typ.):
–45dBc (inside fosc ±1.023MHz)
–55dBc (outside fosc ±1.023MHz)
Note) These values are not guaranteed.
–2–



Sony Corporation CXD2951GA-4
System Block Diagram
CXD2951GA-4
1575.42MHz
LNA
TCXO
CPU
Freq.
Synthesizer
RF/IF
1575.42MHz 1.023MHz
BPF
SAW
TCXO
Reference clock
18.414MHz
(GPS, Sony standard)
LNA
Down
Converter
1.023MHz
LPF
1 bit
Acquisition Block
Acquire GPS signals
Tracking Block
Locking to GPS signals
12ch correlations
Costas Loop & DLL
Computation
& Control
Control Acquisition
& Tracking block
Position calculating
ARM7TDMI
RTC
Timer
3ch
RAM
72KB
ROM
288KB
I/O
UART
A/D
X'tal
32.768kHz
–3–







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