參數(shù)資料
型號： TS4974IQT
廠商： 意法半導(dǎo)體
英文描述： 1W Differential Audio Power Amplifier with Up/Down Digital Volume Control Pins
中文描述： 1W的差分音頻功率放大器向上/向下數(shù)字音量控制引腳
文件頁數(shù)： 5/8頁
文件大小： 150K
代理商： TS4974IQT
Electrical Characteristics
TS4974
5/8
Table 4: V
CC
= +3.3V, GND = 0V, T
amb
= 25
°
C (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
I
CC
Supply Current
No input signal, no load
3.0
mA
I
STANDBY
Standby Current
No input signal, Vstdby = Gnd, RL = 8
230
2000
nA
Voo
Output Offset Voltage
No input signal, RL = 8
,
Floating inputs
5
20
mV
Po
Output Power
THD = 1% Max, f = 1kHz, RL = 8
300
380
mW
THD + N
Total Harmonic Distortion + Noise
Po = 250mW rms,
20Hz < F < 20kHz, RL = 8
,
0dB gain, Cb=1μF, Cin=330nF
0.5
%
PSRR
Power Supply Rejection Ratio
1
F = 217Hz, RL = 8
,
)
Vripple = 200mVpp, Input Grounded, Cb=1μF, Cin=330nF
75
85
dB
CMRR
Common Mode Rejection Ratio
2
F = 217Hz, RL = 8
,
Vincm = 200mVpp, Cb = 1μF, Cin=330nF
45
61
dB
SNR
Signal-to-Noise Ratio ( Weighted A, 6dB gain )
( RL = 8
,
THD + N
≤
0.5%, 20Hz < F < 20kHz)
100
dB
Gs
Start up Gain
-12
dB
G
Digital Gain Range
-33
+12
dB
Gain Step
size
3
dB
Gain accu-
racy
-1
+1
dB
Twu
Wake-up Time
15
ms
V
N
Output Voltage Noise F = 20Hz to 20kHz, RL = 8
Unweighted
Weighted A
21
17
μ
V
RMS
Zin
Differential input impedance
48
60
75
k
T
debounce
Debouncing time
10
ms
T
autorepeat
time between volume change
160
ms
T
range
During autorepeat mode, necessary time to cover the whole gain
range
2500
ms
1)
Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is an added sinus signal to Vcc @ F = 217Hz.
2)
Dynamic measurements - 20*log(rms(Vout)/rms(Vincm)).
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