NJM2775A
PRELIMINARY
PRE&HI-POWER AMPLIFIER with ALC for PORTABLE TAPE RECORDER
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GENERAL DESCRIPTION
The NJM2775A is a pre&power amplifier with ALC
designed for micro and compact cassette recorders.
It contains pre-amplifier, ALC circuit, power amplifiers,
and ripple filter. The pre-amplifier amplifies the signal
come from magnetic head. The ALC circuit limits the
input signal to optimize level in recording. The power
amplifiers drive a speaker in play back and the magnetic
head in recording. The ripple filter stabilizing the supply
voltage to the internal pre-amplifier and an external
condenser microphone.
The NJM2775A improves high output power compared
with the NJM2128.
It is suitable for portable tape recorder, and other
portable playing back and recording recorder items.
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PACKAGE OUTLINE
NJM2775AM
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FEATURES
qOperating
Voltage
qOperating
Current
qOutput
Power
qAutomatic
Level Control
(ALC) Limit Level
qRipple
Filter R.R.
(Ripple Rejection)
qBipolar
Technology
qPackage
Outline
V =1.8 to 6.0V
9mA typ.
+
350mW typ. at V =3V,R
L
=4鈩?THD=10%
200mVrms typ., at f=1kHz
47dB typ., at f=200Hz,C=47碌F
+
DMP16
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PIN CONFIGURATION
1
2
3
4
5
6
7
8
PRE+IN
PRE-IN
16
15
14
13
12
11
10
9
SGND
PRE
AMP
PREOUT
POW+INA
POWOUTA
POWER
AMPA
POW-INA
V
+
POW-INB
PGND
POWER
AMPB
POW+INB
POWOUTB
RFOUT
TC
RIPPLE
FILTER
RFIN
ALC
ALCIN
PIN FUNCTION
1.PRE +IN
2.SGND
3.POW +1NA
4.POW -INA
5.POW -INB
6.POW +INB
7.REFOUT
8.REFIN
9.ALCIN
10.TC
11.POW OUTB
12.PGND
+
13. V
14.POW OUTA
15.PREOUT
16.PRE -IN
-1-
1
2
3
