Rainbow-electronics ATR0635P1 Manuale Utente Scaricare il pdf (Pagina 26)

4979D–GPS–06/08

ATR0635P1

5.2 RTC Oscillator

Figure 5-3. Crystal Connection

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 0.5 ±ppm

Including calibration, temperature,

soldering and ageing effects

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

XT_IN

XT_OUT

RTC

ATR0635 internal

32 kHz

Crystal

Oscillator

32.768 kHz clock

32.768 kHz

50 ppm

C = 2 × C

load

, C

load

can be derived from the crystal datasheet. Maximum value for C is 25 pF.

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 34 35

Commenti su questo manuale

Nessun commento

Rainbow-electronics ATR0635P1 Manuale Utente Pagina 26

Commenti su questo manuale

Prodotti e manuali riguardandi Sensori Rainbow-electronics ATR0635P1