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LM4931 Datasheet(PDF) 16 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM4931
Description  Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers
PDF  47 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4931 Datasheet(HTML) 16 Page - National Semiconductor (TI)

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Microphone Gain Registers
This register is used to control the gain of the microphone preamplifier.
DEFAULT CHART FOR MIC_GAIN (02h)
DATA BIT
7654321
0
DEFAULT
0000000
0
MIC_GAIN (02h) (SET = LOGIC 1, CLEAR = LOGIC 0)
Address
Register
Description
3:0
MIC_GAIN
Programs the gain of the microphone pre-amplifier. Gain is
set as follows:
3:0
Mic Gain
0000
6dB
0001
8dB
0010
10dB
0011
12dB
0100
14dB
0101
16dB
0110
18dB
0111
20dB
1000
22dB
1001
24dB
1010
26dB
1011
28dB
1100
30dB
1101
32dB
1110
34dB
1111
36dB
4
MIC_MUTE
If set the microphone pre-amplifier and the ADC output are
muted.
5
RSVD
RESERVED (Note 14)
6
RSVD
RESERVED (Note 14)
7
HPF_DISABLE
If set the HPF is disabled, this is useful for wider bandwidth
use of the ADC.
www.national.com
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