LM49350RL/NOPB National Semiconductor, LM49350RL/NOPB Datasheet - Page 63
LM49350RL/NOPB
Manufacturer Part Number
LM49350RL/NOPB
Description
IC AUDIO SUBSYSTM 2W D 36USMDXT
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class Dr
Datasheet
1.LM49350RLNOPB.pdf
(104 pages)
Specifications of LM49350RL/NOPB
Output Type
1-Channel (Mono) with Mono and Stereo Headphones
Max Output Power X Channels @ Load
2W x 1 @ 4 Ohm; 69mW x 2 @ 32 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Features
3D, DAC, Depop, I²C, I²S, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control
Mounting Type
Surface Mount
Package / Case
36-MicroSMDxt
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM49350RLTR
- Current page: 63 of 104
- Download datasheet (4Mb)
Bits
Bits
3:0
3
4
5
6
4
NOISE_FLOOR
SOURCE_OVR
SOURCE_SEL
STEREO LINK
NG_ENB
LIMITER
Field
Field
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 I
will apply. Care should be taken when choosing the optimum I
the Limiter.
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.
If SOURCE_OVR is set then this manually overrides the selection of the input amplifier that is used
to alter the gain for ALC operation.
0 = Both ALCs control AUX gain
1 = Both ALCs control MIC gain
If set, the output of the ALC is not set automatically but is controlled by the SOURCE_SEL bit. If
cleared each ALC controls the input gain of the amplifier (AUX or MIC) that is set to that ADC
channel (or MIC if both are selected).
This sets the anticipated noise floor. Signals lower than the noise floor specified will be gated from
the ALC to avoid noise pumping.
This enables the Noise Gate.
2
C gain setting (at the time the LIMITER is enabled) is the maximum gain that the ALC
TABLE 49. ADC_ALC_2 (0x82h)
NOISE_FLOOR
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
63
Description
Description
2
C gain setting whenever enabling
Noise Floor (dB)
–39
–42
–45
–48
–51
–54
–57
–60
–63
–66
–69
–72
–75
–78
–81
–84
www.national.com
Related parts for LM49350RL/NOPB
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
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
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
National Semiconductor [8-Bit D/A Converter]
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
National Semiconductor [Media Coprocessor]
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
AC97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound
Manufacturer:
National Semiconductor
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
General Purpose, Low Voltage, Low Power, Rail-to-Rail Output Operational Amplifiers
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
8-bit 20 MSPS flash A/D converter.
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Low Noise Quad Operational Amplifier
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Quad Differential Line Receivers
Manufacturer:
National Semiconductor
Datasheet:
Part Number:
Description:
Quad High Speed Trapezoidal? Bus Transceiver
Manufacturer:
National Semiconductor
Datasheet: