®
TDA7334
LOW NOISE STEREO PREAMPLIFIER
DUAL CHANNEL PROCESSOR FOR PLAYBACK APPLICATIONS. LOW NOISE HEAD PREAMPLIFIER ...
®
TDA7334
LOW NOISE STEREO PREAMPLIFIER
DUAL CHANNEL PROCESSOR FOR PLAYBACK APPLICATIONS. LOW NOISE HEAD PREAMPLIFIER GROUND COMPATIBLE MUTE, AUTOREVERSE METAL/NORMAL FUNCTIONS INTERNAL SWITCHES FOR EQUALIZATION LOW SUPPLY CURRENT MIXED BIPOLAR/
CMOS TECHNOLOGY DESCRIPTION The TDA7334 is a monolithic BI
Cmos IC designed for use in stereo cassette player systems. The dual preamplifier contains mute, autoreverse, metal/normal facilities for amplification of low level signal in applications requiring very low noise performance. Each channel consists of two cascaded operational
amplifiers. The first one, AMP1, has a fixed gain of 32dB, TEST CIRCUIT
R15 6.2K C4 10nF
DIP16
SO16
ORDERING NUMBER: TDA7334 (DIP16) TDA7334D (SO16)
low noise forward/reverse switchable input, and allows magnetic heads connection directly to ground. The second one, AMP2, is a standard operational amplifier whose equalizing external components fix the frequency response.
EQRO R12 300K EQRI
12 RN 13
9
VS C12 100nF
+VS
R11 1.2K C11 1µF INPUT R C6 300pF
R13 6.8K
1 32dB
GND
INR2 R10 600 Ω C5 300pF INR1 R9 600 Ω
14 15 AMP1 AMP2
11
OUTR
C13 0.22µF
20K
8
F/RSW
R7 10K
+VS
INPUT L C3 300pF R1 600 Ω C2 300pF
INL1 INL2 R2 600Ω
2 3
7 AMP1 AMP2
MUTE C9 100nF
32dB 4 6 RN 5 16 EQSW OUTL
C14 0.22µF
R3 1.2K C1 1µF
R4 6.8K
R5 300K C8 10nF
EQLI
20K
EQLO
GND
D94AU079
R8 10K
+VS
R14 6.2K
November 1999
1/11
TDA7334
ABSOLUTE MAXIMUM RATINGS
Symbol VS Ptot Top Tstg Supply
Voltage Total Po...