ATR0635 Datasheet, PDF (26/33 Pages) ATMEL Corporation – ANTARIS4 Single-chip GPS Receiver SuperSense

Table 5-1.
Specification of GPS TCXOs Appropriate for the Application Example Shown in
Figure 5-1 on page 25
Parameter
Comment
Min
Typ Max Units
Frequency Characteristics
Nominal Frequency
Nominal frequency referenced to
25°C
23.104
MHz
Frequency deviation
Over operating temperature range
Including calibration, temperature,
soldering and ageing effects
0.5 ±ppm
8
±ppm
Temperature range
Operating temperature range
–40.0
+85.0 °C
Electrical
Output waveform
DC coupled clipped sine wave
Output voltage
(peak-to-peak)
Operating range
0.8
1.5
V
Output load capacitance
Tolerable load capacitance
10
pF
Table 5-2.
Specification of an External Reference Signal for the Application Example Shown
in Figure 5-2 on page 25
Parameter
Comment
Min
Typ Max Units
Signal Characteristics
Nominal Frequency
23.104
MHz
Waveform
Sine wave or clipped sine wave
Amplitude
Voltage peak-to-peak
0.6
0.9
1.2
V
5.2 RTC Oscillator
Figure 5-3. Crystal Connection
32.768 kHz
50 ppm
XT_IN
XT_OUT
ATR0635 internal
32 kHz
Crystal
Oscillator
32.768 kHz clock
RTC
C
C
C = 2 × C_load, C_load can be derived from the crystal datasheet. Maximum value for C is 25 pF.
26 ATR0635
4928C–GPS–06/06