lm48860tl National Semiconductor Corporation, lm48860tl Datasheet

no-image

lm48860tl

Manufacturer Part Number
lm48860tl
Description
Ground-referenced, Ultra Low Noise, Fixed Gain Stereo Headphone Amplifier
Manufacturer
National Semiconductor Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
lm48860tlX
Manufacturer:
NS/国半
Quantity:
20 000
© 2008 National Semiconductor Corporation
LM48860
Ground-Referenced, Ultra Low Noise, Fixed Gain Stereo
Headphone Amplifier
General Description
The LM48860 is a ground referenced, fixed-gain audio power
amplifier capable of delivering 40mW per channel of contin-
uous average power into a 16Ω single-ended load with less
than 1% THD+N from a 3V power supply.
The LM48860 features a new circuit technology that utilizes
a charge pump to generate a negative reference voltage. This
allows the outputs to be biased about ground, thereby elimi-
nating output-coupling capacitors typically used with normal
single-ended loads.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM48860 does not require output
coupling capacitors or bootstrap capacitors, and therefore is
ideally suited for mobile phone and other low voltage appli-
cations where minimal power consumption is a primary re-
quirement.
The LM48860 features a low-power consumption shutdown
mode selectable for either channel separately. This is accom-
plished by driving either the SD_RC (Shutdown Right Chan-
nel) or SD_LC (Shutdown Left Channel) (or both) pins with
logic low, depending on which channel is desired shutdown.
Additionally, the LM48860 features an internal thermal shut-
down protection mechanism.
The LM48860 contains advanced pop & click circuitry that
eliminates noises which would otherwise occur during turn-on
and turn-off transitions.
The LM48860 has an internal fixed gain of 1.5V/V.
Boomer
®
is a registered trademark of National Semiconductor Corporation.
300068
Key Specifications
Features
Applications
■ 
■ 
■ 
■ 
■ 
Fixed logic levels with supply voltage
Ground referenced outputs
High PSRR
Available in space-saving micro SMD package
Ultra low current shutdown mode
Improved pop & click circuitry eliminates noises during
turn-on and turn-off transitions
No output coupling capacitors, snubber networks,
bootstrap capacitors, or gain-setting resistors required
Shutdown either channel independently
Mobile Phones
MP3 Players
PDAs
Portable electronic devices
Notebook PCs
PSRR at 217Hz (V
Stereo Power Output at V
Shutdown Current
Internal Fixed Gain
Operating Voltage
R
L
= 16Ω, THD+N = 1%
DD
= 3.0V)
DD
= 3V
October 17, 2008
www.national.com
2.0V to 5.5V
1.5V/V (typ)
40mW (typ)
0.1μA (typ)
80dB (typ)

Related parts for lm48860tl

lm48860tl Summary of contents

Page 1

... The LM48860 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM48860 has an internal fixed gain of 1.5V/V. Boomer ® registered trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation Key Specifications ■  PSRR at 217Hz (V ■  ...

Page 2

Typical Application www.national.com FIGURE 1. Typical Audio Amplifier Application Circuit 2 30006889 ...

Page 3

... Active-Low Shutdown, Right Channel C3 V Supply Voltage DD D1 CCP- Negative Terminal - Charge Pump Flying Capacitor D2 PGND Power Ground D3 CCP+ Positive Terminal - Charge Pump Flying Capacitor LM48860TL Pinout (BUMP DOWN VIEW ) Top View Order Number LM48860TL See NS Package Number TLA12XXX Function 3 30006813 www.national.com ...

Page 4

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage Power Dissipation (Note 3) ESD Rating(Note 4) ESD Rating (Note 5) Electrical Characteristics ...

Page 5

Symbol Parameter Z Output Impedance OUT I Input Leakage L Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or ...

Page 6

Typical Performance Characteristics THD+N vs Output Power 1kHz, 22kHz BW, one channel enabled THD+N vs Output Power 1kHz, 22kHz BW, one channel enabled THD+N ...

Page 7

THD+N vs Output Power = 32Ω 3.6V 1kHz, 22kHz BW, one channel enabled THD+N vs Output Power = 16Ω 4.2V 1kHz, 22kHz BW, one channel enabled ...

Page 8

THD+N vs Frequency 20mW, 22kHz BW O THD+N vs Frequency V = 3.6V 30mW, 22kHz BW O THD+N vs Frequency V = 4.2V ...

Page 9

PSRR vs Frequency = 16Ω 3V 200mV RIPPLE PP 30006887 PSRR vs Frequency = 16Ω 3.6V 200mV RIPPLE PP 300068c0 PSRR vs Frequency = 16Ω V ...

Page 10

Output Power vs Supply Voltage = 16Ω 1kHz, 22kHz Power Dissipation vs Output Power = 16Ω 1kHz Power Dissipation vs Output Power = 16Ω 1kHz ...

Page 11

Supply Current vs Supply Voltage V = GND, No Load IN 30006898 Power Derating Curve = 32Ω 3V 30006891 Power Derating Curve = 32Ω 5V 30006893 Power Derating Curve = ...

Page 12

Application Information SUPPLY VOLTAGE SEQUENCING good general practice to first apply the supply voltage to a CMOS device before any other signal or supply on other pins. This is also true for the LM48860 audio amplifier which ...

Page 13

Applications using speakers with this limited frequency re- sponse reap little improvement by using high value input and output capacitors. As shown ...

Page 14

Demonstration Board PCB Layout Top Silkscreen Midlayer 1 www.national.com 300068a5 Top Layer 300068a2 Midlayer 2 14 300068a4 300068a3 ...

Page 15

Bottom Layer 15 300068a1 Bottom Silkscreen www.national.com ...

Page 16

Revision History Rev Date 1.0 01/16/08 Initial release. 1.01 01/29/08 Text edits. 1.02 02/14/08 Fixed typos (x-axis) on few curves. 1.03 10/17/08 Edited the X1 and X2 limits under the Physical Dimension section. www.national.com Description 16 ...

Page 17

... Physical Dimensions inches (millimeters) unless otherwise noted X1 = 1.5±0.03mm 2.0±0.03mm 0.600±0.075mm, 12 – Bump micro SMD Order Number LM48860TL NS Package Number TLA12XXX 17 www.national.com ...

Page 18

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

Related keywords