Continued from preceding page.
Pin No.
Function
Notes
LA1225M
No-signal voltage (V)
The detector coil is inserted
7
DET
between pin 7 and pin 5 (VCC).
3.0
Equivalent circuit
7
8
Limiter amplifier output
Pin 8 and pin 7 (DET) are
connected through a capacitor.
2.8
The IF buffer output is turned on
9
IF buffer
when the voltage applied to the
(Also used for control SW) pin is the recommended 1.5 V or
0
higher.
This is an active-low output.
10
SD
This is an open-collector output
1.6
and can directly drive an LED.
(ICmax = 20 mA)
A11510
8
A11511
9
IF buffer output
Control SW
A11512
10
A11513
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