5041 series

SEIKO NPC CORPORATION—9

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.

Figure 3. Center frequency adjustment

−50

−40

−30

−20

−10

0

10

20

30

40

50

020

Ta [

°C]

40

60

80

100

−20

−40

Before adjustment

After adjustment

Figure 4. Temperature rotation compensation

−50

−40

−30

−20

−10

0

10

20

30

40

50

020

Ta [

°C]

40

60

80

100

−20

−40

Before compensation

After compensation

Figure 5. Low-temperature characteristics

compensation

−50

−40

−30

−20

−10

0

10

20

30

40

50

020

Ta [

°C]

40

60

80

100

−20

−40

Before compensation

After compensation

Figure 6. High-temperature characteristics

compensation

−50

−40

−30

−20

−10

0

10

20

30

40

50

020

Ta [

°C]

40

60

80

100

−20

−40

Before compensation

After compensation