HA12220F Datasheet, PDF (14/20 Pages) Hitachi Semiconductor – CD-ROM Drive Head Amplifier IC

HA12220F
Bias, Reference Voltage
Pin 26 is for a bypass capacitor to eliminate noise from the IC’s internal bias circuits.
Connect a capacitor to pin 25 to remove the ripple component from the reference voltage.
The IC’s internal reference voltage is connected internally.
0.1µ
10µ
27 26
25
GND
V_CC BYPS
VCF
40k 40k
BIAS
+
–
VCB
12
Figure 13 Bias, Reference Voltage
Rev.1, Apr. 1997, page 14 of 20