LM4938MH National Semiconductor, LM4938MH Datasheet - Page 6

• Manufacturer Part Number: LM4938MH
• Description: IC,Audio Amplifier,DUAL,TSSOP,28PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LM4938MH

• No. Of Channels: 2
• Output Power: 2W
• Supply Voltage Range: 2.7V To 5.5V
• Thd + N: 0.05% @ 400mW, 8ohm, VDD=5V
• Load Impedance: 3ohm
• Operating Temperature Range: -20°C To +85°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Typical Application
Truth Table for Logic Inputs
Note 16: If system beep is detected on the Beep In pin, the system beep will be passed through the bridged amplifier regardless of the logic of the Mute and HP
sense pins.
Gain
Sel
X
X
0
0
0
0
1
1
1
1
Mode
0
0
1
1
0
0
1
1
X
X
Headphone
Sense
X
X
0
1
0
1
0
1
0
1
Mute
X
0
0
0
0
0
0
0
0
1
FIGURE 2. Typical Application Circuit
Shutdown Output Stage Set To
(Note 16)
0
0
0
0
0
0
0
0
0
1
External Gain
External Gain
External Gain
External Gain
Internal Gain
Internal Gain
Internal Gain
Internal Gain
6
Shutdown
Muted
DC Volume
Adjustable
Adjustable
Adjustable
Adjustable
Fixed
Fixed
Fixed
Fixed
X
X
Configuration
Output Stage
Muted
BTL
BTL
BTL
BTL
SE
SE
SE
SE
X
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