TS4855_04 Datasheet, PDF (14/27 Pages) STMicroelectronics – LOUDSPEAKER & HEADSET DRIVER WITH VOLUME CONTROL

TS4855
Figure 25: Headphone output power vs. load
resistance (Output modes 2, 3, 4, 5, 6, 7)
350
300
250
200
150
100
50
0
16
THD+N=10%
THD+N=1%
Vcc = 5V
F = 1kHz
BW < 125kHz
Tamb = 25°C
20 24 28 32 36 40 44 48
Load Resistance (Ohm)
Figure 26: Headphone output power vs. load
resistance (Output modes 2, 3, 4, 5, 6, 7)
100
THD+N=10%
80
60
40
20
0
16
THD+N=1%
Vcc = 3V
F = 1kHz
BW < 125kHz
Tamb = 25°C
20 24 28 32 36 40 44 48
Load Resistance (Ohm)
Figure 27: Spkout PSRR vs. frequency
(Output modes 1, 3, 5, 7 input grounded)
0
-10
-20
-30
-40
-50
-60
-70
-80
Vcc=3V
-90
100
Ouput mode 1, 3, 5, 7
RL = 8Ω
Vripple=0.2Vpp
Tamb = 25°C
Vcc=5V
1000
10000
Frequency (Hz)
100000
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Electrical Characteristics
Figure 28: Spkout PSRR vs. frequency
(Output modes 2, 4, 6 input grounded)
0
Ouput mode 2, 4, 6
-10 _{RL = 8Ω}
Vripple=0.2Vpp
-20 _{Tamb = 25°C}
-30
-40
-50
Vcc=5V
-60
-70
-80
100
Vcc=3V
1000
10000
Frequency (Hz)
100000
Figure 29: HDout PSRR vs. frequency
(Output modes 2, 3 input grounded)
0
Output mode 2, 3
-10 Vcc=+5V
RL = 32Ω
-20 Vripple=0.2Vpp
Tamb = 25°C
-30
-40
G=+6dB
-50
G=+3dB
G=-40.5dB
G=-6dB
G=-18dB
G=0dB
-60
-70
100
1000
10000
Frequency (Hz)
100000
Figure 30: HDout PSRR vs. frequency
(Output modes 2, 3 input grounded)
0
Output mode 2, 3
-10 Vcc=+3V
RL = 32Ω
Vripple=0.2Vpp
-20 _{Tamb = 25°C}
G=-40.5dB
-30
G=-18dB
G=-6dB
-40
G=+6dB G=0dB
G=+3dB
-50
-60
100
1000
10000
Frequency (Hz)
100000