lm48861tm National Semiconductor Corporation, lm48861tm Datasheet

no-image

lm48861tm

Manufacturer Part Number
lm48861tm
Description
Powerwise Ground-referenced, Ultra Low Noise, Stereo Headphone Amplifier
Manufacturer
National Semiconductor Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
lm48861tmX
Manufacturer:
NS/国半
Quantity:
20 000
© 2008 National Semiconductor Corporation
LM48861
PowerWise® Ground-Referenced, Ultra Low Noise, Stereo
Headphone Amplifier
General Description
The LM48861 is a single supply, ground-referenced stereo
headphone amplifier. Part of National's PowerWise® product
family, the LM48861 consumes only 3mW of power, yet still
provides great audio performance. The ground-referenced
architecture eliminates the larger DC blocking capacitors re-
quired by traditional headphone amplifier's saving board
space and reducing cost.
The LM48861 features common-mode sensing that corrects
for any differences between the amplifier ground and the po-
tential at the headphone return terminal, minimizing noise
created by any ground mismatches.
The LM48861 delivers 22mW/channel into a 32Ω load with
<1% THD+N with a 1.8V supply. Power supply requirements
allow operation from 1.2V to 2.8V. High power supply rejec-
tion ratio (PSRR), 83dB at 217Hz, allows the device to oper-
ate in noisy environments without additional power supply
conditioning. A low power shutdown mode reduces supply
current consumption to 0.01µA.
Superior click and pop suppression eliminates audible tran-
sients on power-up/down and during shutdown. The
LM48861 is available in an ultra-small 12-bump, 0.4mm pitch,
micro SMD package (1.215mm x 1.615mm).
Boomer
®
is a registered trademark of National Semiconductor Corporation.
300541
Key Specifications
Features
Applications
■ 
■ 
■ 
■ 
■ 
V
V
at 1.5V
Ground referenced outputs – eliminates output coupling
capacitors
Common-mode sensing
Advanced click-and-pop suppression
Low supply current
Low power shutdown mode
Minimum external components
Micro-power shutdown
ESD protection of 8kV HBM contact
Available in space-saving 12-bump µSMD package
Mobile Phones
Portable electronic devices
MP3 Players
Output Power/channel at
Output Power/channel at
Quiescent Power Supply Current
PSRR at 217Hz
Shutdown Current
DD
DD
R
R
R
R
L
L
L
L
= 1.5V, THD+N = 1%
= 1.8V, THD+N = 1%
= 16Ω
= 32Ω
= 16Ω
= 32Ω
June 11, 2008
www.national.com
0.01μA (typ)
12mW (typ)
13mW (typ)
24mW (typ)
22mW (typ)
83dB (typ)
2mA (typ)

Related parts for lm48861tm

lm48861tm Summary of contents

Page 1

... Superior click and pop suppression eliminates audible tran- sients on power-up/down and during shutdown. The LM48861 is available in an ultra-small 12-bump, 0.4mm pitch, micro SMD package (1.215mm x 1.615mm). Boomer ® registered trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation Key Specifications ■  Output Power/channel ...

Page 2

Typical Application www.national.com FIGURE 1. Typical Audio Amplifier Application Circuit 2 300541a9 ...

Page 3

... Connection Diagrams TM Package 1.215mm x 1.615mm x 0.6mm Top View Order Number LM48861TM See NS Package Number TMD12AAA Order Number Package 12 Lead micro SMD LM48861TM 4mm Pitch Bump Name A1 CPP A2 PGND A3 CPN SHDN CPV OUTL INL D1 OUTR D2 COM D3 INR ...

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 (Note1) Storage Temperature Input Voltage Power Dissipation (Note 3) ESD Ratings (HBM) (Note 4) ESD Ratings (OUTL, ...

Page 5

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 non-degradation at the Absolute Maximum RatingsRatings or other conditions beyond ...

Page 6

Typical Performance Characteristics THD+N vs Frequency = 16Ω 1.5V THD+N vs Frequency = 16Ω 1.8V THD+N vs Output Power V = 1.5V & 1.8V www.national.com ...

Page 7

Power Dissipation vs Output Power = 16Ω 1kHz R L 300541h2 PSRR vs Frequency = 32Ω 1.5V 200mV , R DD RIPPLE P-P L 300541c8 Output Power vs Supply Voltage = 32Ω ...

Page 8

Shutdown Current vs Supply Voltage No Load www.national.com Crosstalk vs Frequency V = 1.5V 300541c9 8 = 32Ω = 5mW, R OUT L 300541c7 ...

Page 9

... LM48861. The power /2), like traditional dissipation should not exceed the maximum power dissipa- DD tion point of the micro SMD package given in equation 1. For the LM48861TM micro SMD package, θ 150°C, and T JMAX tem surroundings. PROPER SELECTION OF EXTERNAL COMPONENTS ...

Page 10

The -3dB point of the high-pass filter is found using Equation (2) below. π Where the value selected based on the gain-setting IN resistor selection. In relation to ...

Page 11

Demo Board Schematic and Layout FIGURE 3: Top Silkscreen Layer FIGURE 5: Bottom Solder Mask FIGURE 4: Top Solder Mask 30054110 30054106 FIGURE 6: Top Layer 11 30054199 30054109 www.national.com ...

Page 12

FIGURE 7: Layer 2 FIGURE 9: Bottom Layer www.national.com 30054107 FIGURE 8: Layer 3 FIGURE 10: Bottom Silkscreen 30054104 12 30054108 30054105 ...

Page 13

Revision History Rev Date 1.0 06/11/08 Description Initial release. 13 www.national.com ...

Page 14

... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted TM Package Order Number LM48861TM NS Package Number TMD12AAA X1 = 1.215mm 1.615mm 0.6mm 14 ...

Page 15

Notes 15 www.national.com ...

Page 16

... 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