LM49101TM/NOPB National Semiconductor, LM49101TM/NOPB Datasheet - Page 17

• 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

Notes: All registers default to 0 on initial power-up.
1. GAMP_SD: Is used to shut down gain amplifiers not in use
and reduce current consumption. See Table 3.
2. LS (EP_Mode): Loudspeaker power amplifier bias current
reduction. See Table 3.
3. Turn_On_Time: Reduces the turn on time for faster acti-
vation. See Table 3.
4. Power_On: Master Power on bit. See Table 3.
5. EP Bypass: Earpiece bypass mode to allow BYPASS in-
puts to drive speaker outputs. See Table 4
6. HPR_SD: Will shutdown one channel of the headphone
amplifier. See Table 4.
Output Mode Control
Output Gain Control
Mono Input Volume
Right Input Volume
Left Input Volume
General Control
Address
Chip
Register
Control
Control
Control
A7
1
D7
0
0
1
1
1
1
D6
0
1
0
0
1
1
A6
1
Bypass
D5
EP
1
0
1
0
1
(5)
FIGURE 4. Start and Stop Diagram
A5
TABLE 2. Control Registers
Input_Mute
1
GAMP_SD
HPR_SD
TABLE 1. Chip Address
D4
(6)
(1)
(8)
A4
17
1
(EP_Mode)
LS_Gain
7. Mode_Control: Sets the output mode. See Table 4.
8. Input Mute: Controls muting of the inputs except the BY-
PASS inputs. See Table 5.
9. LS_Gain: Sets the gain of the loudspeaker amplifier to 0dB
or 6dB. See Table 5.
10. HP_Gain: Sets the headphone amplifier output gain. See
Table 5.
11. Mono_Vol/Left_Vol/Right_Vol: Sets the input volume for
Mono, Left and Right inputs. See Table 6.
D3
LS
A3
(9)
1
(2)
Mono_Vol
Right_Vol
Left_Vol
D2
Mode_ Control
0
A2
0
(11)
(11)
(11)
HP_Gain
Turn_On
_Time
D1
(7)
A1
0
(3)
(10)
Power_On
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A0
0
D0
(4)