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TS4974_07 Datasheet, PDF (7/25 Pages) STMicroelectronics – 1W differential audio power amplifier with up/down digital volume control pins
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TS4974
Electrical characteristics
Table 6. VCC = +2.6V, GND = 0V, Tamb = 25°C (unless otherwise specified)
Symbol
Parameter
Min. Typ. Max. Unit
ICC
Supply current
No input signal, no load
2.8 3.4
mA
ISTBY
Standby current
No input signal, VSTBY = GND, RL = 8 Ω
230 2000 nA
Volume control UP/DOWN current
IU/D
0 ≤ VU/D ≤ 0.3 VCC
10
μA
Voo
Output offset voltage
No input signal, RL = 8 Ω, G = 0 dB, floating inputs
5
20
mV
Po
Output power
THD = 1% max, f = 1 kHz, RL = 8 Ω
200 250
mW
Total harmonic distortion + noise
THD + N Po = 500 mW rms,
0.5
%
20 Hz < F < 20 kHz, RL = 8 Ω, G = 0 dB, Cb= 1 µF, Cin= 330 nF
Power supply rejection ratio(1)
PSRR F = 217 Hz, RL = 8 Ω
85
dB
Vripple = 200 mVpp, input grounded, Cb= 1 µF, Cin= 330 nF, G= 0 dB
CMRR
Common mode rejection ratio(2)
F = 217 Hz, RL = 8 Ω,
Vincm = 200 mVpp, Cb = 1 µF, Cin= 330 nF, G= 0 dB
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
3
dB
Gain
accuracy
Tolerance between theoretical gain set and real gain
-1
+1
dB
Wake-up time
twu
Cb=1 µF
Output voltage noise F = 20 Hz to 20 kHz, RL = 8 Ω, G = 0 dB
VN
Unweighted
A-weighted
Zin Differential input impedance
tdebounce Debouncing time
tautorepeat Time between volume changes
trange
During autorepeat mode, necessary time to cover the whole gain
range
10
ms
21
µVRMS
14
48
60
75
kΩ
10
ms
220
ms
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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