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NJM2775A
PRELIMINARY
PRE&HI-POWER AMPLIFIER with ALC for PORTABLE TAPE RECORDER
s 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. s PACKAGE OUTLINE
NJM2775AM
s 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,RL=4,THD=10% 200mVrms typ., at f=1kHz 47dB typ., at f=200Hz,C=47F
+
DMP16
s 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
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NJM2775A
PRELIMINARY
s ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage PA Output Peak Current PA Input Voltage Range Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL V
+
(Ta=25C) RATINGS +7.0 1 0.4 (DMP16)300 -20 to +75 -40 to +125 UNIT V A V mW C C
IOP VIN PD Topr Tstg
s RECOMMENDED OPERATING VOLTAGE RANGE (Ta=25C) PARAMETER MIN. TYP MAX. UNIT Operating Voltage Range 1.8 3.0 6.0 V
s ELECTORICAL CHARACTERISTICS PARAMETER Operating Voltage Power Amp Input Bias Current Out Put Offset Output Power (Note 1) T.H.D. Close Loop V-Gain Equivalent Input Noise Voltage Ripple Rejection Cut off Frequency Pre Amp Output Voltage Voltage Gain Output Noise Voltage ALC Limit Level Ripple Filter Output Voltage Ripple Rejection (Note 1) at on PC Board VO2 RR2 RL=2k f=200Hz,C=47F ALC f=1kHz 100
+
(V =3.0V,Ta=25C) RATINGS RL= MIN. RL=8 THD=10%,f=1kHz,V =4V,RL=8 THD=10%,f=1kHz,V =3V,RL=4 V =4V,RL=8,Po=200mW,f=1kHz f=1kHz RS=10k,RL=4,A-Weighted RS=10k,RL=4,BW=22Hz to 22kHz f=100Hz RL=4,Po=0.1W, Av=-3dB from f=1kHz f=1kHz,THD=1% f=1kHz Rs=3.3k
+ + +
+
SYMBOL ICC IB Vo PO1 PO2 THD Av1 VNI1 VNI2 RR1 FH Vo1 Av VNO
TYP 9 140 0 500 300 0.2 44 2.0 2.5 47 80 0.2 38 0.1 200
+
MAX. 14 50 47 41 0.4 300
+
UNIT mA nA mV mW % dB Vrms Vrms dB kHz Vrms dB mVrms mVrms V dB
400 250 41 0.1 35 -
V -0.24 V -0.2 V -0.16 40 47 54
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NJM2775A
PRELIMINARY
s TYPICAL APPLICATIONS
HEAD MIC
PB
1
REC
PRE+IN PRE-IN
16
EQ.
2 3
POW-INA
SGND
PRE AMP
PREOUT
15
ON/OFF
POW+INA
POWOUTA
14
2.2 0.01F
POWER AMPA
V+
4
0.01F 10F
POW-INB
13 12 11
2.2
4.7 4/8 0.1F
5
0.01F
POW+INB
PGND
SPEAKER
PB REC
POWER AMPB
POWOUTB
6
MIC. Current 47F
0.01F
7 8
47F
RFOUT
TC
10 9
HEAD
RIPPLE FILTER
RFIN
ALC
ALCIN
REC
PB
[CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
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