Communication ICs
FApplication example
BA8201 / BA8201F
FAttached components
C1:
This is a capacitor for phase compensation, and is nor-
mally connected at 68pF.
C2:
This is a coupling capacitor. The inductance from the
telephone line changes based on this value. Normally, a
value of 2.2µF to 10µF is appropriate.
C3:
This is a capacitor for phase compensation, and is nor-
mally connected at 47pF.
C4:
This is the capacitor for balancing the output. It sup-
presses rippling in the output and also carries out de-
coupling for the bias voltage supply of the IF pin. It should
be adjusted based on the output current, load, and other
factors.
R1:
Bias is applied from this pin to the IF pin. The inductance
from the telephone line changes based on this value.
Normally, a value of 100kΩ is appropriate.
R2:
This can be connected between Pins 6 and 7 to clamp the
output voltage. The output voltage is expressed using the
equation below.
Vo (V) = 2 22 (µA) R2 (Ω) (reference value)
∗22µA is the reference internal current source for
the IC.
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