TDA7449L Datasheet | STMicroelectronics

DESCRIPTION The TDA7449L is a volume control and balance (Left/Right) processor for quality audio applications in TV systems. Selectable input gain is provided. Control of all the functions is acplished by serial bus. The AC signal setting is obtained by resistor net BLOCK DIAGRAM MUXOUTL 8 100K 9 100K G VOLUME 10 DIP20 ORDERING NUMBER: TDA7449L works and switches bined with operational amplifiers. Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and DC stepping are obtained. L-IN1 L-IN2 SPKR ATT LEFT 5 LOUT 19 R-IN1 7 100K 6 G 100K VOLUME SPKR ATT RIGHT VREF 2 INPUT MULTIPLEXER + GAIN 11 MUXOUTR SUPPLY 3 0/30d B 2d B STEP I CBUS DECODER + LATCHES 20 18 SCL SDA DIG_GND R-IN2 ROUT VS AGND 1 CREF D98AU868 April 1999 1/13 ABSOLUTE MAXIMUM RATINGS Symbol VS Tamb Tstg Operating Supply Voltage Operating Ambient Temperature Storage Temperature Range Parameter Value 10.5 -10 to 85 -55 to 150 Unit V °C °C PIN CONNECTION CREF VS PGND ROUT LOUT R_IN2 R_IN1 L_IN1 L_IN2 MUXOUT(L) 1 2 3 4 5 6 7 8 9 10 D98AU869 20 19 18 17 16 15 14 13 12 11 SDA SCL DIG_GND N.C. N.C. N.C. N.C. N.C. N.C. MUXOUT(R) THERMAL DATA Symbol R th j-pin Parameter Thermal Resistance Junction-pins Value 150 Unit °C/W QUICK REFERENCE DATA Symbol VS VCL THD S/N SC Supply Voltage Max. input signal handling Total Harmonic Distortion V = 1Vrms f = 1KHz Signal to Noise Ratio V out = 1Vrms (mode = OFF) Channel Separation f = 1KHz Input Gain in (2d B step) Volume Control Balance Control Mute Attenuation (1d B step) 1d B step 0 -47 -79 100 Parameter Min. 6 2 0.01 106 90 30 0 0 0.1 Typ. 9 Max. 10.2 Unit V Vrms % d B d B d B d B d B d B 2/13 ELECTRICAL CHARACTERISTICS (refer to the test circuit Tamb = 25°C, VS = 9V, RL= 10KΩ, RG = 600Ω, all controls flat (G = 0d B), unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit SUPPLY VS IS SVR Supply Voltage Supply Current Ripple Rejection 6 60 9 7 90 10.2 V m A d B KΩ Vrms d B 1 d B d B d B INPUT...