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TDA7334-TDA7334D
LOW NOISE STEREO AMPLIFIER
TDA7334LOW NOISE STEREO PREAMPLIFIER
DUAL CHANNEL PROCESSOR FOR PLAY-
BACK APPLICATIONS.
LOW NOISE HEAD PREAMPLIFIER
GROUND COMPATIBLE
MUTE, AUTOREVERSE METAL/NORMAL
FUNCTIONS
INTERNAL SWITCHES FOR EQUALIZATION
LOW SUPPLY CURRENT
MIXED BIPOLAR/CMOS TECHNOLOGY
DESCRIPTIONThe TDA7334 is a monolithic BICmos IC de-
signed 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 per-
formance.
Each channel consists of two cascaded opera-
tional amplifiers.
The first one, AMP1, has a fixed gain of 32dB,
low noise forward/reverse switchable input, and
allows magnetic heads connection directly to
ground. The second one, AMP2, is a standard op-
erational amplifier whose equalizing external
components fix the frequency response.
TEST CIRCUIT
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
PIN CONNECTION (Top view)
TDA7334
Application Circuit
P.C. Board and component layout of the Application Circuit (1:1 scale)
TDA73343/11
ELECTRICAL CHARACTERISTICS (VS = 8V;RIN = 600Ω; f = 1KHz; Tamb = 25°C; unless other-wise specified (see figure 2)
TDA7334
Figure 1: Quiescent Current vs. Supply Figure 2: D.C. Output vs. Supply Voltage
Figure 3: Forward/Reverse Threshold Figure 4: Metal/Normal Threshold
Figure 5: Mute Threshold Figure 6: Mute Attenuation vs. Frequency
TDA73345/11
Figure 7: Mute Attenuation vs. Output Level Figure 8: THD vs. Frequency
Figure 9: THD + N vs. Frequency Figure 10: THD vs. Supply Voltage
Figure 11: Load Characteristic Figure 12: Signal Handling vs. Supply Voltage
TDA7334
