TPA2000D4

STEREO 2W CLASSD AUDIO POWER AMPLIFIER

WITH STEREO HP AMPLIFIER

SLOS337B − DECEMBER 2000 − REVISED NOVEMBER 2005

18

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APPLICATION INFORMATION

Table 2. Gain Settings

GAIN1

GAIN0

AMPLIFIER GAIN

(dB)

INPUT IMPEDANC

(k

Ω)

GAIN1

GAIN0

TYP

TYP

0

0

6

104

0

1

12

74

1

0

18

44

1

1

23.5

24

input resistance

Each gain setting is achieved by varying the input resistance of the amplifier, which can range from its smallest

value to over 6 times that value.

CI

IN

ZI

ZF

Input

Signal

The −3 dB frequency can be calculated using equation 4:

(4)

1

2

p C