AK8136A Datasheet, PDF (15/18 Pages) Asahi Kasei Microsystems – Low Power Multiclock Generator with XO

AK8136A
Voltage Controlled Crystal Oscillator (VCXO)
The AK8136A has a voltage controlled crystal oscillator (VCXO), featuring fine frequency tuning for 27MHz
of primary clock frequency by external DC voltage control. This tuning enables output clock frequency to
synchronize the external clock system. VIN (Pin3) accepts DC voltage control from a processor or a
system controller, and pulls the primary frequency of crystal to higher or lower. This pulling range is
determined by crystal characteristic, on-chip load capacitor, and stray capacitance of PCB. The AK8136A
is designed to range ±150ppm of primary frequency in AKM’s authorized condition, and the typical pulling
profile is shown in Figure 8. For details about the condition and other specific crystal application case,
refer the AK8136A application note.
27MHz VCXO Characteristics
KDS DSX530GA
200
150
100
50
0
0
0.5
1
1.5
2
2.5
3
3.5
-50
-100
-150
-200
Figure 8: Typical VCXO Pulling Profile
MS1108-E-04
- 15 -
Dec-2013