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LM49350RLEVAL Datasheet(PDF) 78 Page - Texas Instruments

Part # LM49350RLEVAL
Description  LM49350 Boomer짰 Audio Power Amplifier Series High Performance Audio Codec Sub-System with a Ground-Referenced Stereo Headphone Amplifier & an Ultra Low EMI Class D Loudspeaker Amplifier with Dual I2S/PCM Digital Audio Interfaces
PDF  108 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM49350RLEVAL Datasheet(HTML) 78 Page - Texas Instruments

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LM49350, LM49350RLEVAL
SNAS359D – SEPTEMBER 2008 – REVISED JUNE 2012
www.ti.com
DAC Effects Registers
Table 67. DAC_ALC_1 (0xA0h)
Bits
Field
Description
2:0
SAMPLE_ RATE
This programs the timers on the ALC with the closest DAC sample rate.
SAMPLE_ RATE
DAC Fs
000
8kHz
001
12kHz
010
16kHz
011
24kHz
100
32kHz
101
48kHz
110
96kHz
111
192kHz
3
LIMITER
If set, the circuit will never apply gain to the signal, no matter how small, but it will attenuate
the signal as soon as it reaches target and release it at the decay rate, once signal level
reduces below target. The I2C gain setting (at the time the LIMITER is enabled) is the
maximum gain that the ALC will apply. Care should be taken when choosing the optimum
I2C gain setting whenever enabling the Limiter.
4
STEREO LINK
If set, the ALC circuit uses the stereo average of the input signals to control the gain of the
stereo output. This maintains stereo imaging. If this bit is cleared, then both channels
operate as dual mono.
Table 68. DAC_ALC_2 (0xA1h)
Bits
Field
Description
3:0
NOISE_FLOOR
This sets the anticipated noise floor. Signals lower than the specified noise floor will be
gated from the ALC to avoid noise pumping.
NOISE_FLOOR
Noise Floor (dB)
0000
-39
0001
-42
0010
-45
0011
-48
0100
-51
0101
-54
0110
-57
0111
-60
1000
-63
1001
-66
1010
-69
1011
-72
1100
-75
1101
-78
1110
-81
1111
-84
4
NG_ENB
This enables the Noise Gate
78
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Copyright © 2008–2012, Texas Instruments Incorporated
Product Folder Links: LM49350 LM49350RLEVAL



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