TFA9882 datasheet(21/31 Pages) NXP

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TFA9882

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Product data sheet

Rev. 2 — 20 April 2011

21 of 31

NXP Semiconductors

TFA9882

3.4 W I2S input mono class-D audio amplifier

(1) Vripple = 0 V (fripple = 0 Hz)

(2) fripple = 217 Hz

(3) fripple = 1 kHz

(4) fripple = 6 kHz

(1) Vripple = 0 V (fripple = 0 Hz)

(2) fripple = 217 Hz

(3) fripple = 1 kHz

(4) fripple = 6 kHz

a. VDDP =3.6 V, RL =4 Ω, LL = 20 μH, Po = 100 mW

Vripple = 200 mV (RMS)

b. VDDP =5V, RL =4 Ω, LL = 20 μH, Po =100 mW

Vripple = 200 mV (RMS)

Fig 14. THD+N + power supply intermodulation distortion as a function of frequency

001aam641

fi (Hz)

105

104

102

103

(4)

(3)

(2)

(1)

10−2

10−1

THD+N+IMD

(%)

10−3

001aam642

fi (Hz)

105

104

102

103

(4)

(3)

(2)

(1)

10−2

10−1

10−3

THD+N+IMD

(%)

(1)

gain = +3 dB

(2)

gain = 0 dB

(3)

gain = −3 dB

VDDP = 3.6 V, RL =4 Ω, LL = 20 μH, Po = 500 mW

(1) VDDP = 3.6 V

(2) VDDP = 5 V

RL =4 Ω, LL = 20 μH, Vripple = 200 mV (RMS)

Fig 15. Normalized gain as a function of frequency

Fig 16. PSRR as a function of ripple frequency

001aan660

fi (Hz)

105

104

102

103

-2

(dB)

-4

(1)

(3)

(2)

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−70

−50

−90

−30

−10

PSRR

(dB)

−110

fripple (Hz)

105

104

102

103

(2)

(1)

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