Continued from preceding page.
Pin No.
Pin name
23 METAL1
26 METAL2
Pin voltage
[V]
0
LA4587M
Unit (resistance: Ω, capacitance: F)
Internal equivalent circuit
Remarks
c Connected to GND through
3.9 kΩ in metal on mode (pin
40: floating)
24 AMSS IN1
0.75
25 AMSS IN2
29 PRE REV IN1
0.75
30 PRE REV IN2
31 PRE FWD IN2
32 PRE FWD IN1
33 VREF
0.75
34 REF
0.75
c AMSS inverting input
connection.
c An external input resistor is
required.
b Pins 29 and 30 turn on in
REV mode (pin 39: GND).
c Pins 31 and 32 turn on in
FWD mode (pin 39: floating)
c When not using the head, a
bias resistor (2.2 kΩ) is
required between these pins
and VREF (pin 33).
c An anti-buzz capacitor is built
in.
c VREF amplifier output. Low
impedance is achieved due
to the output resistor (ro =
10 Ω).
c Inflow/outflow current:
200 µA max.
c The VREF amplifier is
referenced hereto.
36 AMSS OUT
c Outputs a pulse waveform in
accordance with the AMSS
IN (pins 24 and 25) input
level.
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No.5204-7/18