NXP Semiconductors TFA9812 Fig 19. Gain as a function of frequency Fig 20. Gain as a function of AVOL

TFA9812_2 © NXP B.V. 2009. All rights reserved.
Preliminary data sheet Rev. 02 — 22 January 2009 57 of 66
NXP Semiconductors TFA9812
BTL stereo Class-D audio amplifier with I2S input
a. VP = 12 V; RL = 2 × 6 Ω; Po = 1 W b. VP = 12 V; RL = 2 × 8 Ω; Po = 1 W
Fig 18. Total harmonic distortion-plus-noise as a function of frequency
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1
10−1
10
THD+N
(%)
10−2
f (Hz)
10 105
104 102103
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1
10−1
10
THD+N
(%)
10−2
f (Hz)
10 105
104 102103
VP = 12 V; PO = 1 W
(1) RL = 6 Ω 15 µH / 680 µF
(2) RL = 8 Ω 15 µH / 680 µF
VP = 12 V; RL = 8 Ω; fi = 1 kHz
(1) 0 dB
(2) 24 dB gain boost
Fig 19. Gain as a function of frequency Fig 20. Gain as a function of AVOL
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−1
1
3
G
(dB)
−3
f (Hz)
10 105
104 102103
(1)
(2)
AVOL (V)
03210.5 1.5 2.5
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−80
−100
−60
−20
−40
0
G
(dB)
−120
(1)(2)