LM4985_14 Datasheet, PDF (14/33 Pages) Texas Instruments – LAudio Power Amplifier Series Stereo 135mW Low Noise Headphone Amplifier with Selectable Capacitively Coupled

LM4985, LM4985TMEVAL
SNAS346B – MAY 2006 – REVISED MAY 2006
www.ti.com
Typical Performance Characteristics (continued)
T_A = 25°C, A_V = 0dB, f_IN = 1kHz unless otherwise stated.
PSRR vs Frequency
V_DD = 2.5V, R_L = 16Ω
V_RIPPLE = 200mVpp, OCL
+0
PSRR vs Frequency
V_DD = 3.6V, R_L = 16Ω
V_RIPPLE = 200mVpp, OCL
+0
-10
-10
-20
-20
-30
-30
-40
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20
50 100 200 500 1k 2k 5k 10k 20k
FREQUENCY (Hz)
Figure 29.
-100
20
50 100 200 500 1k 2k 5k 10k 20k
FREQUENCY (Hz)
Figure 30.
+0
-10
-20
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-40
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-70
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-100
20
PSRR vs Frequency
V_DD = 5.0V, R_L = 16Ω
V_RIPPLE = 200mVpp, OCL
50 100 200 500 1k 2k 5k 10k 20k
FREQUENCY (Hz)
Figure 31.
+0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
20
PSRR vs Frequency
V_DD = 2.5V, R_L = 32Ω
V_RIPPLE = 200mVpp, OCL
50 100 200 500 1k 2k 5k 10k 20k
FREQUENCY (Hz)
Figure 32.
+0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
20
PSRR vs Frequency
V_DD = 3.6V, R_L = 32Ω
V_RIPPLE = 200mVpp, OCL
50 100 200 500 1k 2k 5k 10k 20k
FREQUENCY (Hz)
Figure 33.
+0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
20
PSRR vs Frequency
V_DD = 5.0V, R_L = 32Ω
V_RIPPLE = 200mVpp, OCL
50 100 200 500 1k 2k 5k 10k 20k
FREQUENCY (Hz)
Figure 34.
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