LM4811LDBD National Semiconductor, LM4811LDBD Datasheet

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LM4811LDBD

Manufacturer Part Number
LM4811LDBD
Description
BOARD EVALUATION LM4811LD
Manufacturer
National Semiconductor
Series
Boomer®r
Datasheet

Specifications of LM4811LDBD

Amplifier Type
Class AB
Output Type
Headphones, 2-Channel (Stereo)
Max Output Power X Channels @ Load
105mW x 2 @ 16 Ohm
Voltage - Supply
2 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
LM4811
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
© 2006 National Semiconductor Corporation
LM4811
Dual 105mW Headphone Amplifier with Digital Volume
Control and Shutdown Mode
General Description
The LM4811 is a dual audio power amplifier capable of
delivering 105mW per channel of continuous average power
into a 16Ω load with 0.1% (THD+N) from a 5V power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. Since the LM4811 does not require
bootstrap capacitors or snubber networks, it is optimally
suited for low-power portable systems.
The LM4811 features a digital volume control that sets the
amplifier’s gain from +12dB to −33dB in 16 discrete steps
using a two−wire interface.
The unity-gain stable LM4811 also features an externally
controlled, active-high, micropower consumption shutdown
mode. It also has an internal thermal shutdown protection
mechanism.
Connection Diagrams
Boomer
®
is a registered trademark of National Semiconductor Corporation.
See NS Package Number MUB10A
Order Number LM4811MM
MSOP Package
Top View
DS200061
20006102
Key Specifications
Features
n Digital volume control range from +12dB to −33dB
n LD and MSOP surface mount packaging
n "Click and Pop" suppression circuitry
n No bootstrap capacitors required
n Low shutdown current
Applications
n Cellular Phones
n MP3, CD, DVD players
n PDA’s
n Portable electronics
j
j
j
average output power into 16Ω
average power into 32Ω
THD+N at 1kHz, 105mW continuous
THD+N at 1kHz, 70mW continuous
Shutdown Current
See NS Package Number LDA10A
Order Number LM4811LD
LD Package
Top View
www.national.com
0.3µA (typ)
0.1% (typ)
0.1% (typ)
April 2006
20006162

Related parts for LM4811LDBD

LM4811LDBD Summary of contents

Page 1

... Connection Diagrams MSOP Package Top View Order Number LM4811MM See NS Package Number MUB10A Boomer ® registered trademark of National Semiconductor Corporation. © 2006 National Semiconductor Corporation Key Specifications j THD+N at 1kHz, 105mW continuous average output power into 16Ω j THD+N at 1kHz, 70mW continuous average power into 32Ω ...

Page 2

Connection Diagrams YD Package Top View Order Number LM4811YD See NS Package Number YDA10A www.national.com (Continued) 20006162 2 YD Marking 20006167 Top View Z - Plant Code XY - Date Code TT - Die Traceability L4811 - LM4811YD ...

Page 3

Typical Application *Refer to the Application Information Section for information concerning proper selection of the input and output coupling capacitors. FIGURE 1. Typical Audio Amplifier Application Circuit 3 20006101 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 ESD Susceptibility (Note 3) ESD Susceptibility Machine model (Note 6) Junction Temperature ( Soldering Information Small Outline Package Vapor Phase (60 sec.) Infrared (15 sec ...

Page 5

Electrical Characteristics The following specifications apply for V Symbol Parameter I Supply Current DD I Shutdown Current SD V Output Offset Voltage OS P Output Power o THD+N Total Harmonic Distortion PSRR Power Supply Rejection Ratio V (CLOCK, UP/DN, SHUTDOWN) ...

Page 6

Electrical Characteristics The following specifications apply for V Symbol Parameter Shutdown Attenuation Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Note 2: Operating Ratings indicate conditions for which the device is functional, but ...

Page 7

Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency 20006103 THD+N vs Frequency 20006105 THD+N vs Frequency 20006107 7 20006104 20006106 20006108 www.national.com ...

Page 8

Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Output Power www.national.com (Continued) THD+N vs Frequency 20006109 THD+N vs Output Power 20006111 THD+N vs Output Power 20006113 8 20006110 20006112 20006114 ...

Page 9

Typical Performance Characteristics THD+N vs Output Power THD+N vs Output Power THD+N vs Output Power (Continued) THD+N vs Output Power 20006115 THD+N vs Output Power 20006117 THD+N vs Output Power 20006119 9 20006116 20006118 20006120 www.national.com ...

Page 10

Typical Performance Characteristics Output Power vs Load Resistance Output Power vs Load Resistance Output Power vs Power Supply www.national.com (Continued) Output Power vs Load Resistance 20006122 Output Power vs Supply Voltage 20006124 Output Power vs 20006126 10 20006123 20006125 Power ...

Page 11

Typical Performance Characteristics Dropout Voltage vs Supply Voltage Power Dissipation vs Output Power Channel Separation (Continued) Power Dissipation vs 20006128 Power Dissipation vs 20006130 Channel Separation 20006132 11 Output Power 20006129 Output Power 20006131 20006133 www.national.com ...

Page 12

Typical Performance Characteristics Noise Floor Power Supply Rejection Ratio Frequency Response www.national.com (Continued) Power Supply Rejection Ratio 20006134 Power Supply Rejection Ratio 20006150 Supply Current vs Supply Voltage 20006136 12 20006135 20006151 20006144 ...

Page 13

... Further detailed and specific information concerning PCB layout, fabrication, and mounting an LD/YD (LLP) package is available from National Semiconductor’s Package Engineer- ing Group under application note AN1187. POWER SUPPLY BYPASSING ...

Page 14

Application Information logic high level, and 0.4V maximum for a logic low level best to switch between ground and V shutdown operation. By switching the SHUTDOWN pin the LM4811 supply current draw will be minimized ...

Page 15

Application Information point. Thus, a frequency of 20Hz is used in the following equations to ensure that the response is better than 0.5dB down at 100Hz. ≥ (2π kΩ Hz) = 0.241µF; use 0.39µF. ...

Page 16

Application Information www.national.com (Continued) FIGURE 4. Recommended MSOP PC Board Layout: TOP Silk Screen FIGURE 5. Recommended MSOP PC Board Layout: TOP Top Layer FIGURE 6. Recommended MSOP PC Board Layout: Bottom Layer 16 20006158 20006159 20006160 ...

Page 17

Application Information FIGURE 7. Recommended LD/YD PC Board Layout: FIGURE 8. Recommended LD/YD PC Board Layout: FIGURE 9. Recommended LD/YD PC Board Layout: (Continued) TOP Silk Screen TOP Top Layer Bottom Layer 17 20006163 20006164 20006165 www.national.com ...

Page 18

Revision History Rev Date 0.1 04/06/06 Added the YD package and markings, then re-released D/S to the WEB (per Alvin F.). www.national.com Description 18 ...

Page 19

Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM4811LD NS Package Number LDA10A Order Number LM4811YD NS Package Number YDA10A 19 www.national.com ...

Page 20

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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