LM49101TM/NOPB National Semiconductor, LM49101TM/NOPB Datasheet - Page 20

• Manufacturer Part Number: LM49101TM/NOPB
• Description: IC AUDIO SUBSYSTM 1.3W AB 25USMD
• Manufacturer: National Semiconductor
• Series: Boomer®, PowerWise®r
• Type: Class ABr

Specifications of LM49101TM/NOPB

• Output Type: 1-Channel (Mono) with Stereo Headphones
• Max Output Power X Channels @ Load: 1.3W x 1 @ 8 Ohm; 45mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: Depop, Differential Inputs, I²C, Shutdown, Thermal Protection, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 25-MicroSMD
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 1-Channel Mono/2-Channel Stereo
• Audio Amplifier Function: Headphone/Speaker
• Single Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (typ): 3/5V
• Power Supply Requirement: Triple
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 90dB
• Single Supply Voltage (min): Not RequiredV
• Single Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): 1.7/1.8/2.7V
• Dual Supply Voltage (max): 2.9/5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 25
• Package Type: uSMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM49101TMTR

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Bits
2:0
3
4
INPUT MUTE
HP_GAIN
LS_GAIN
Field
TABLE 5. Output Gain Control Register
These bits set the gain of the headphone output amplifiers.
This bit sets the loudspeaker output amplifier gain.
This bit will set all the inputs except the BYPASS inputs to be in Mute mode.
Value
Value
Value
000
001
010
011
100
101
110
111
0
1
0
1
20
Loudspeaker output amplifier gain is set to 0dB.
Loudspeaker output amplifier gain is set to 6dB.
Normal operation of all inputs.
Mutes all inputs except BYPASS with over 80dB of attenuation
with out adjusting the volume settings. This bit can be used to
mute the inputs to eliminate noise or transients from other
systems and ICs. See the section Input Mute Bit in the
Application Information section for a detailed explanation.
Description
Gain (dB)
Status
Status
–1.2
–2.5
–4.0
–6.0
–8.5
–12
–18
0