LM4937RL/NOPB National Semiconductor, LM4937RL/NOPB Datasheet - Page 17

• Manufacturer Part Number: LM4937RL/NOPB
• Description: IC AUDIO SUBSYSTM 1.25W 36USMDXT
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4937RL/NOPB

• Output Type: 1-Channel (Mono) with Mono and Stereo Headphones
• Max Output Power X Channels @ Load: 1.25W x 1 @ 8 Ohm; 80mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: Depop, Differential Inputs, I²C, I²S, Mute, Shutdown, SPI, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 36-MicroSMDxt
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM4937RLTR

Headphone Right Channel
MONO_IN_GAIN_2
Headphone Left Channel
ANA_R_GAIN_2
ANA_L_GAIN_2
Loudspeaker
All Outputs
Earpiece
0
0
0
0
1
1
1
1
DIG_R_GAIN_1
DIG_L_GAIN_1
0
0
0
0
1
1
1
1
0
0
1
1
TABLE 11. Analog Single-Ended Input Amplifier Gain Select (07h)
TABLE 10. Mono Differential Amplifier Input Gain Select (08h)
ANA_R_GAIN_1
ANA_L_GAIN_1
MONO_IN_GAIN_1
TABLE 12. DAC Gain Select (08h)
0
0
1
1
0
0
1
1
Outputs Toggled Via Register Control
TABLE 9. Output Control (01h)
0
0
1
1
0
0
1
1
HP_R_OUTPUT = 1
HP_L_OUTPUT = 1
EP_OUTPUT = 1
LS_OUTPUT = 1
Output On
Output On
Output On
Output On
CD3 = 1
DIG_R_GAIN_0
DIG_L_GAIN_0
17
0
1
0
1
ANA_R_GAIN_0
ANA_L_GAIN_0
MONO_IN_GAIN_0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Output Off
Output Off
(OCL = 0)
(OCL = 0)
HP_R_OUTPUT = 0
HP_L_OUTPUT = 0
LS_OUTPUT = 0
EP_OUTPUT = 0
Input Gain Setting
Input Gain Setting
All Outputs Off
Input Gain Setting
Output Off
Output Off
CD3 = 0
–3dB
–6dB
–3dB
12dB
15dB
0dB
3dB
6dB
0dB
3dB
6dB
9dB
–12dB
–9dB
–6dB
–3dB
0dB
3dB
6dB
9dB
Output Mute
Output Mute
(OCL = 1)
(OCL = 1)
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