UBX-G7020 - Hardware Integration Manual
Component Selection
GPS.G7-HW-10003 Objective Specification Page 48 of 74
3 Component Selection
This section provides some information on components that are critical for the performance of the UBX-G7020
chip. Of course, temperature range specifications need only be as wide as required by a particular application.
3.1 TCXO (Y1)
Nominal frequency at 25ºC
26 MHz (other frequencies possible, see datasheet
1
)
Frequency calibration tolerance at 25ºC
Operating temperature range I
Operating temperature range II
Frequency stability over operating temperature range I
referenced to the midpoint between min. and max. frequency
value over this temperature range
Frequency stability over operating temperature range II
referenced to the midpoint between min. and max. frequency
over this temperature range
Frequency slope
2
over -30ºC to 85ºC
Frequency slope
3
over -40ºC to -30ºC
Static temperature hysteresis
4
Supply Voltage Stability, ±5% supply voltage change at 25°C
Load Sensitivity, ±10% load change at 25°C
Long term stability, frequency drift over 1 year
Long term stability, frequency drift over 2 years
Long term stability, frequency drift over 10 years
G Sensitivity, all 3 axes, random vibration, 30 Hz to 1.5 kHz
Shock, frequency shift after 1000G 250 µs sine
Electrical Specifications
1.75 – 2.0 V or 2.5 – 3.6 V
Supply Current at maximum supply voltage
DC coupled clipped sine wave
Output voltage level peak to peak at minimum supply voltage
Typical SSB Phase Noise Density, 1 Hz offset
Typical SSB Phase Noise Density, 10 Hz offset
Typical SSB Phase Noise Density, 100 Hz offset
Typical SSB Phase Noise Density, 1 kHz offset
Typical SSB Phase Noise Density, 10 kHz offset
Environmental specifications
Half sine wave acceleration of 100 G peak amplitude for 11 ms
1
UBX-G7020-Kx Data Sheet [1] and UBX-G7020-CT Data Sheet [2].
2
Minimum of 1 frequency reading every 2ºC.
3
Minimum of 1 frequency reading every 2ºC.
4
Frequency change after reciprocal temperature ramped over the operating temperature range I. Frequency measured before and after at
25°C.
5
Depends on system supply voltage, see section 2.4.5.