u-blox UBX-G7020 User Manual

UBX-G7020 - Hardware Integration Manual
Component Selection
GPS.G7-HW-10003 Objective Specification Page 51 of 74
Other crystals can be used provided they meet the specifications listed in Table 15. For reliable GPS
performance particular attention must be paid to the temperature range and frequency slope
specifications.
3.3 RTC crystal (Y3)
ID
Parameter
Value
1
Frequency Specifications
1.1
Oscillation mode
Fundamental Mode
1.2
Nominal frequency at 25 ºC
32.768 kHz
1.3
Frequency calibration tolerance at 25 ºC
< ±100 ppm
2
Electrical specifications
2.1
Load capacitance C
L
7 pF
2.2
Equivalent series resistance R
S
< 100 k
Table 17: RTC crystal specifications
Manufacturer
Order No.
Micro Crystal
CC7V-T1A 32.768 kHz 7.0 pF +/- 100 ppm
Table 18: Recommend parts list for RTC crystal
3.4 SQI flash (U3)
Manufacturer
Order No.
Comments
SST
SST26VF016
3V, 16Mb, several package/temperature options
SST
SST26VF032
3V, 32Mb, several package/temperature options
Spansion
S25FL004K
3V, 4Mb, several package/temperature options
Spansion
S25FL008K
3V, 8Mb, several package/temperature options
Spansion
S25FL016K
3V, 16Mb, several package/temperature options
GigaDevice
GD25Q40
3V, 4Mb, several package/temperature options
Macronix
MX25L8035E
3V, 8Mb, cannot be used for data logging
Table 19: Recommend parts list for SQI flash
3.5 RF band-pass filter (F1)
Depending on the application circuit, consult manufacturer datasheet for DC, ESD and RF power ratings!
Manufacturer
Order No.
System supported
Comments
TDK/ EPCOS
B8401: B39162-B8401-P810
GPS+GLONASS
High attenuation
TDK/ EPCOS
B3913: B39162B3913U410
GPS+GLONASS
For automotive application
muRata
SAFEA1G58KA0F00
GPS+GLONASS
Only for mobile application
muRata
SAFFB1G58KA0F0A
GPS+GLONASS
Only for mobile application
Triquint
856561
GPS
Compliant to the AEC-Q200 standard
Table 20: Recommend parts list for RF band-pass filter
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u-blox UBX-G7020 Specifications

General

Brand	u-blox
Model	UBX-G7020
Category	GPS
Language	English