LM4930LQBD National Semiconductor, LM4930LQBD Datasheet - Page 7

• Manufacturer Part Number: LM4930LQBD
• Description: BOARD EVALUATION LM4930LQ
• Manufacturer: National Semiconductor
• Series: Boomer®r

Specifications of LM4930LQBD

• Amplifier Type: Class AB
• Output Type: 1-Channel (Mono) with Stereo Headphones
• Max Output Power X Channels @ Load: 1W x 1 @ 8 Ohm; 27mW x 2 @ 32 Ohm
• Voltage - Supply: 2.6 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: LM4930
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

System Control Registers
BIT
RESET
Address
4:0
9:5
13:10
This register is used to control the gain of the headphone amplifier, the loudspeaker amplifier, and the microphone preampli-
fier. The 7 bit address for the GAINCONFIG register is XX10010.
to logic 1)
GAINCONFIG (XX10010). (Set = logic 1, Clear = logic 0)
15
0
Register
LOUDSPKR_GAIN
HP_GAIN
MIC_GAIN
14
0
13
0
Description
Programs the gain of the loudspeaker amplifier. Gain is set as follows:
4:0
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
Programs the gain of the headphone amplifier. Gain is set as follows:
9:5
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
Programs the gain of the microphone amplifier. Gain is set as follows:
12
0
(Continued)
GAIN CONFIG REGISTERS
11
0
Loudspeaker
Gain
-34.5dB
-33dB
-31.5dB
-30dB
-28.5dB
-27dB
-25.5dB
-24dB
-22.5dB
-21dB
-19.5dB
-18dB
-16.5dB
-15dB
-13.5dB
-12dB
Headphone Gain
-46dB
-45dB
-43.5dB
-42db
-40.5dB
-39dB
-37.5dB
-36dB
-34.5dB
-33dB
-31.5dB
-30dB
-28.5dB
-27dB
-25.5dB
-24dB
10
0
9
0
7
8
0
4:0
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
9:5
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
(X = 0 if ADDR is set to logic 0)
7
0
6
0
5
0
Loudspeaker Gain
-10.5dB
-9dB
-7.5dB
-6dB
-4.5dB
-3dB
-1.5dB
0dB
1.5dB
3dB
4.5dB
6dB
7.5dB
9dB
10.5dB
12dB
Headphone Gain
-22.5dB
-21dB
-19.5dB
-18dB
-16.5dB
-15dB
-13.5dB
-12dB
-10.5dB
-9dB
-7.5dB
-6dB
-4.5dB
-3dB
-1.5dB
0dB
4
0
3
0
(X = 1 if ADDR is set
2
0
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1
0
0
0