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TS4974 Datasheet(PDF) 6 Page - STMicroelectronics

Part No. TS4974
Description  1W differential audio power amplifier with up/down digital volume control pins
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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TS4974 Datasheet(HTML) 6 Page - STMicroelectronics

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Electrical characteristics
TS4974
6/25
Table 5.
VCC = +3.3 V, GND = 0 V, Tamb = 25° C (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
ICC
Supply current
No input signal, no load
3.0
3.6
mA
ISTBY
Standby current
No input signal, VSTBY = GND, RL = 8 Ω
260
2000
nA
IU/D
Volume control UP/DOWN current
0
≤VU/D ≤ 0.3 VCC
10
μA
Voo
Output offset voltage
No input signal, RL = 8 Ω, G= 0 dB, floating inputs
520
mV
Po
Output power
THD = 1% max, f = 1 kHz, RL = 8 Ω
300
380
mW
THD + N
Total harmonic distortion + noise
Po = 500 mW rms,
20 Hz < F < 20 kHz, RL = 8 Ω, G = 0 dB, Cb= 1 µF, Cin = 330 nF
0.5
%
PSRR
Power supply rejection ratio(1)
F = 217 Hz, RL = 8 Ω
Vripple = 200 mVpp, input grounded, Cb = 1 µF, Cin= 330 nF, G = 0 dB
85
dB
CMRR
Common mode rejection ratio(2)
F = 217 Hz, RL = 8 Ω,
Vincm = 200 mVpp, Cb = 1 µF, Cin = 330nF, G = 0dB
61
dB
SNR
Signal-to-noise ratio (weighted A, G= 0 dB)
(RL = 8 Ω, THD + N ≤ 0.5%, 20 Hz < F < 20 kHz)
100
dB
Gs
Start up gain (
when powered up from VCC - See Section 4.9:
Volume setting on page 20)
-12
dB
G
Gain range
-33
+12
dB
Gain step
size
3dB
Gain
accuracy
Tolerance between theoretical gain set and real gain
-1
+1
dB
twu
Wake-up time
Cb= 1 µF
10
ms
VN
Output voltage noise F = 20 Hz to 20 kHz, RL = 8 Ω, G = 0 dB
Unweighted
A-weighted
21
14
µVRMS
Zin
Differential input impedance
48
60
75
k
Ω
tdebounce Debouncing time
10
ms
tautorepeat Time between volume changes
220
ms
trange
During autorepeat mode, necessary time to cover the whole gain
range
3200
ms
1.
Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is an added sinus signal to VCC @ F = 217 Hz.
2.
Dynamic measurements - 20*log(rms(Vout)/rms(Vincm)).


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