5041 series
FUNCTIONAL DESCRIPTION
Frequency Adjustment Function
The 5041 series ICs have a built-in oscillator frequency adjustment function. The frequency adjustment set-
tings are written to and stored in internal EEPROM, making the devices easy to setup. A typical compensation
sequence is shown below.
50
40
30
20
Before adjustment
50
40
30
Before compensation
20
10
0
−10
−20
−30
After compensation
−40
−50
−40 −20
0
20
40
Ta [°C]
∆f/f
[ppm]
10
0
−10
−20
−30
After adjustment
−40
−50
−40 −20
0
20
40
Ta [°C]
60
80 100
∆f/f
[ppm]
60
80 100
Figure 3. Center frequency adjustment
Figure 4. Temperature rotation compensation
50
40
30
50
40
30
After compensation
Before compensation
∆f/f
[ppm]
0
−10
−20
−30
−40
−50
−40 −20
Before compensation
0
20
40
60
80 100
∆f/f
[ppm]
20
10
20
10
0
−10
−20
−30
−40
−50
−40 −20
After compensation
0
20
40
60
80 100
Ta [°C]
Ta [°C]
Figure 5. Low-temperature characteristics
compensation
Figure 6. High-temperature characteristics
compensation
SEIKO NPC CORPORATION—9
NPC [ NIPPON PRECISION CIRCUITS INC ]
