TPA2012D2 datasheet(28/43 Pages) TI2

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TPA2026D2

SLOS649B – MARCH 2010 – REVISED MAY 2016

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9.6.5 AGC Fixed Gain Control (Address: 5)

Table 10. AGC Fixed Gain Control (Address: 5)

ADDRESS

I2C BIT

LABEL

DEFAULT

DESCRIPTION

05 (05H) –

AGC Fixed

Gain Control

7:6

Unused

5:0

Fixed Gain

000110 (6 dB)

Sets the fixed gain of the amplifier: two's complement

Gain

100100

–28 dB

100101

–27 dB

100110

–26 dB

(gain increases by 1 dB with every step)

111101

–3 dB

111110

–2 dB

111111

–1 dB

000000

0 dB

000001

1 dB

000010

2 dB

000011

3 dB

(gain increases by 1dB with every step)

011100

28 dB

011101

29 dB

011110

30 dB

Fixed Gain

These bits are used to select the fixed gain of the amplifier. If compression is enabled, fixed

gain is adjustable from –28 dB to 30 dB. If compression is disabled, fixed gain is adjustable

from 0 dB to 30 dB.

9.6.6 AGC Control (Address: 6)

Table 11. AGC Control (Address: 6)

ADDRESS

I2C BIT

LABEL

DEFAULT

DESCRIPTION

06 (06H) –

AGC Control

Output Limiter

Disable

0 (enable)

Disables the output limiter function. Can only be disabled when the AGC compression

ratio is 1:1 (off)

6:5

NoiseGate

Threshold

01 (4 mVrms)

Select the threshold of the noise gate

Threshold

1 mVrms

4 mVrms

10 mVrms

20 mVrms

4:0

Output Limiter

Level

11010 (6.5 dBV)

Selects the output limiter level

Output Power (Wrms)

Peak Output Voltage

(Vp)

dBV

00000

0.03

0.67

–6.5

00001

0.03

0.71

–6

00010

0.04

0.75

–5.5

(Limiter level increases by 0.5dB with every step)

11101

0.79

3.55

11110

0.88

3.76

8.5

11111

0.99

3.99

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