Rainbow-electronics ATR0630 Manual de usuario descargar pdf (Pagina 27)

4920A–GPS–01/06

ATR0630 [Preliminary]

Note: All other parameters as specified in Table 5-1.

Table 5-1. Specification of GPS Crystals Appropriate for the Application Example Shown in

Figure 5-1 on page 25

Parameter Comment Min Typ Max Units

Frequency Characteristics

Fundamental frequency

Nominal frequency referenced to

25°C

23.104 MHz

Calibration tolerance Frequency at 23°C ±2°C 7.0 ±ppm

Frequency deviation Over operating temperature range 15.0 ±ppm

Temperature range Operating temperature range –40.0 +85.0 °C

Electrical

Load capacitance (CL) 18.5 19.5 pF

Equivalent Series Resistance (ESR)

Fundamental Specification 7 12 23 Ω

Table 5-2. Specification of GPS Crystals Appropriate for the Application Example Shown in

Figure 5-2 on page 25

Parameter Comment Min Typ Max Units

Equivalent Series Resistance (ESR)

Fundamental Specification 7 40 Ω

Table 5-3. Specification of GPS TCXOs Appropriate for the Application Example Shown in

Figure 5-3 on page 26

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 2.0 ±ppm

Temperature range Operating temperature range –40.0 +85.0 °C

Electrical

Output waveform DC coupled clipped sine wave

Output voltage

(peak-to-peak)

At minimum supply voltage 0.8 V

Output load capacitance Tolerable load capacitance 10 pF

Table 5-4. Specification of an External Reference Signal for the Application Example Shown

in Figure 5-4 on page 26

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 0.8 1.0 V

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 33 34 35

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