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TDA7273N/a10avaiSINGLE CHIP STEREO CASSETTE PLAYBACK SYSTEM


TDA7273 ,SINGLE CHIP STEREO CASSETTE PLAYBACK SYSTEMTDA7273SINGLE CHIP STEREO CASSETTE PLAYBACK SYSTEMWIDE OPERATING SUPPLY VOLTAGE(1.8V to 7V)INPUT CO ..
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TDA7273
SINGLE CHIP STEREO CASSETTE PLAYBACK SYSTEM
TDA7273
SINGLE CHIP STEREO CASSETTE PLAYBACK SYSTEM
WIDE OPERATING SUPPLY VOLTAGE
(1.8V to 7V)
INPUT COUPLING WITHOUT CAPACITORS
BUILT-IN DC STEREO VOLUME CONTROL
BUILT-IN RIPPLE FILTERS
LOW QUIESCENT CURRENT
NO EXTERNAL BOUCHEROT CELL
MAX OUTPUT CURRENT 70mA PEAK
DESCRIPTION

The TDA7273 is a monolithic integrated circuit
designed for portable cassette players market.
It comprises preamplifiers, DC volume control,
and headphone drivers.
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
DC CHARACTERISTICS: Tamb = 25°C; VS = 3V; RL = 10KΩ (Preamplifier), RL = 32Ω (Headphone);

VIN = 0; VOL control = Vref
TEST CIRCUIT
TDA7273

2/9
ELECTRICAL CHARACTERISTICS (Tamb = 25°C, VS = 3V, f = 1KHz, RL = 32Ω Vol. control = 2/3Vref
unless otherwise specified)
PREAMPLIFIER SECTION
HEADPHONE DRIVER
PIN CONNECTION (Top view)
TDA7273
Figure 1: Application Circuit
Figure 2: P.C. Board and Component Layout of the Circuit of Figure 1 (1:1 scale)
TDA7273

4/9
Figure 7: SVR vs. Frequency (PREAMPLIFIER)
Figure 6: THD vs. Frequency (VS = 3V,

Vo =330mVrms, RL = 10KΩ)
(PREAMPLIFIER)
Figure 5: Closed Loop Gain vs. Frequency

(VS = 3V) (PREAMPLIFIER)
Figure 3: Supply Current vs. Supply Voltage

(Preamplifier + Driver) Figure 4: Vref, vs. Supply Voltage (pin 16)
Figure 8: Quiescent Output Voltage vs. Supply

Voltage (DRIVER)
TDA7273
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