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TDA7318D013TR
DIGITAL CONTROLLED STEREO AUDIO PROCESSOR
TDA7318DIGITAL CONTROLLED STEREO AUDIO PROCESSOR
INPUT MULTIPLEXER:
- 4 STEREO INPUTS
- SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTION TO DIFFERENT SOURCES
INPUT AND OUTPUT FOR EXTERNAL
EQUALIZER OR NOISE REDUCTION SYS-
TEM
VOLUME CONTROL IN 1.25dB STEPS
TREBLE AND BASS CONTROL
FOUR SPEAKER ATTENUATORS:
- 4 INDEPENDENT SPEAKERS CONTROL
IN 1.25dB STEPS FOR BALANCE AND
FADER FACILITIES
- INDEPENDENT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL I2 C BUS
DESCRIPTIONThe TDA7318 is a volume, tone (bass and treble)
balance (Left/Right) and fader (front/rear) processor
for quality audio applications in car radio and Hi-Fi
systems.
Selectable input gain is provided. Control is accom-
plished by serial I2 C bus microprocessor interface.
The AC signal setting is obtained by resistor networks
and switches combined with operational amplifiers.
Thanks to the used BIPOLAR/CMOS Tecnology,
Low Distortion, Low Noise and Low DC stepping are
obtained.
PIN CONNECTION (Top view)
THERMAL DATA
QUICK REFERENCE DATA
ABSOLUTE MAXIMUM RATINGS
TEST CIRCUIT
TDA7318
BLOCK DIAGRAM
TDA7318
ELECTRICAL CHARACTERISTICS (refer to the test circuit Tamb = 25°C, VS = 9V, RL = 10KΩ,RG = 600Ω, all controls flat (G = 0), f = 1KHz unless otherwise specified)
SUPPLY
INPUT SELECTORS
VOLUME CONTROL
SPEAKER ATTENUATORS
BASS CONTROL (1)
TREBLE CONTROL (1)
TDA7318
ELECTRICAL CHARACTERISTICS (continued)AUDIO OUTPUTS
GENERAL
BUS INPUTS
Notes:(1) Bass and Treble response see attached diagram (fig.19). The center frequency and quality of the resonance behaviour can be choosen by
the external circuitry. A standard first order bass response can be realized by a standard feedback network
(2) The selected input is grounded thru the 2.2μF capacitor.
Figure 1: Noise vs. Volume/Gain Settings Figure 2: Signal to Noise Ratio vs. VolumeSetting
TDA73185/14
