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LM4914MH Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM4914MH
Description  1W Monaural, 85mW Stereo Headphone Audio Amplifier
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4914MH Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LM4914
1W Monaural, 85mW Stereo Headphone Audio Amplifier
General Description
The unity-gain stable LM4914 is both a mono differential
output (for bridge-tied loads, or BTL) audio power amplifier
and a single-ended (SE) stereo headphone amplifier. Oper-
ating on a single 5V supply, the mono BTL mode delivers 1W
into an 8
Ω load. In SE stereo mode, the amplifier delivers
85mW to 32
Ω loads. The LM4914 features circuitry that
suppresses output transients ("clicks and pops").
The LM4914 is designed for notebook and other handheld
portable applications. It delivers high quality output power
from a surface-mount package and requires few external
components. The LM4914 is pin and functionally compatible
with the TPA0253.
Other features include an active-low micro-power shutdown
mode and thermal shutdown protection.
The LM4914 is available in a space efficient 10-lead
exposed-DAP TSSOP package.
Key Specifications
j BTL output power (RL =8
Ω)
V
DD = at 3.0V, THD = 0.1%
V
DD = at 5.0V, THD = 0.1%
330mW (typ)
1W (typ)
j SE output power (RL =32
Ω)
V
DD = at 3.0V, THD = 0.1%
V
DD = at 5.0V, THD = 0.1%
30mW (typ)
85mW (typ)
j Micro-power shutdown supply current
0.03µA (typ)
j PSRR (f = 1kHz)
V
DD = at 3.0V, BTL Mode
V
DD = at 5.0V, BTL Mode
52dB (typ)
52dB (typ)
Features
n
Advanced "click and pop" suppression circuitry
n
Stereo headphone amplifier mode
n
Low current micro-power shutdown mode
n
Thermal shutdown protection circuitry
n
2.5V to 5.5V operation
n
Unity-gain stable
n
Gain set with external resistors
n
Space-saving exposed-DAP TSSOP package
Applications
n
PDAs
n
Cellular phones
n
Handheld portable electronic devices
Connection Diagram
200634A0
Top View
Order Number LM4914MH
See NS package Number MXF10A
Boomer® is a registered trademark of National Semiconductor Corporation.
March 2003
© 2003 National Semiconductor Corporation
DS200634
www.national.com


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