LM4916MMX National Semiconductor, LM4916MMX Datasheet

LM4916MMX

Manufacturer Part Number
LM4916MMX
Description
Manufacturer
National Semiconductor
Datasheet

Specifications of LM4916MMX

Operational Class
Class-AB
Audio Amplifier Output Configuration
1-Channel Mono/2-Channel Stereo
Audio Amplifier Function
Headphone/Speaker
Total Harmonic Distortion
0.1@8Ohm@25mW%
Dual Supply Voltage (typ)
Not RequiredV
Power Supply Requirement
Single
Rail/rail I/o Type
No
Power Supply Rejection Ratio
66dB
Single Supply Voltage (min)
900mV
Single Supply Voltage (max)
2.5V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
10
Package Type
MSOP
Lead Free Status / Rohs Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM4916MMX
Manufacturer:
NS/国半
Quantity:
20 000
© 2006 National Semiconductor Corporation
LM4916
1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone
Audio Amplifier
General Description
The unity gain stable LM4916 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 1.5V supply, the mono BTL mode delivers
85mW into an 8Ω load at 1% THD+N. In Single Ended stereo
headphone mode, the amplifier delivers 14mW per channel
into a 16Ω load at 1% THD+N.
With the LM4916 packaged in the MM and LLP packages,
the customer benefits include low profile and small size.
These packages minimize PCB area and maximizes output
power.
The LM4916 features circuitry that reduces output transients
("clicks" and "pops") during device turn-on and turn-off, an
externally controlled, low-power consumption, active-low
shutdown mode, and thermal shutdown. Boomer audio
power amplifiers are designed specifically to use few exter-
nal components and provide high quality output power in a
surface mount package.
Typical Application
Boomer
®
is a registered trademark of National Semiconductor Corporation.
DS200487
FIGURE 1. Block Diagram
Key Specifications
n Mono-BTL output power
n
n Stereo Headphone output power
n
n Micropower shutdown current
n Supply voltage operating range
n PSRR 1kHz, V
Features
n Single-cell 0.9V to 2.5V battery operation
n BTL mode for mono speaker
n Single ended headphone operation with coupling
n Unity-gain stable
n "Click and pop" suppression circuitry
n Active low micropower shutdown
n Low current, active-low mute mode
n Thermal shutdown protection circuitry
Applications
n Portable one-cell audio products
n Portable one-cell electronic devices
capacitors
(R
(R
L
L
= 8Ω, V
= 16Ω, V
DD
DD
DD
= 1.5V, THD+N = 1%)
= 1.5V
= 1.5V, THD+N = 1%)
20048701
0.9V
<
www.national.com
0.02µA (typ)
V
85mW (typ)
14mW (typ)
DD
66dB (typ)
July 2006
<
2.5V

Related parts for LM4916MMX

LM4916MMX Summary of contents

Page 1

... Typical Application Boomer ® registered trademark of National Semiconductor Corporation. © 2006 National Semiconductor Corporation Key Specifications n Mono-BTL output power (R = 8Ω, V ...

Page 2

Connection Diagrams MSOP Package Top View Order Number LM4916MM See NS Package Number MUB10A for MSOP LD Package Top View Order Number LM4916LD See NS Package Number LDA10A www.national.com 20048702 Bottom Line - Part Number 20048752 2 MSOP Marking 200487F9 ...

Page 3

Typical Connections FIGURE 2. Typical Single Ended Output Configuration Circuit FIGURE 3. Typical BTL Speaker Configuration Circuit 3 20048703 20048705 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 2) ESD Susceptibility(Note 3) ESD Susceptibility (Note 4) Junction Temperature Solder Information Small Outline Package Vapor ...

Page 5

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications ...

Page 6

Typical Performance Characteristics THD+N vs Frequency V = 1.5V 5mW < BW 80kHz, Single Ended Output THD+N vs Frequency V = 1.2V 5mW 16Ω, Single Ended Output ...

Page 7

Typical Performance Characteristics THD+N vs Output Power V = 1.2V 16Ω 1kHz DD L Single Ended Output, A Output Power vs Supply Voltage f = 1kHz 16Ω, L Single Ended Output, A Output Power ...

Page 8

Typical Performance Characteristics Output Power vs Load Resistance V = 1.2V 1kHz DD Single Ended Output, A Power Dissipation vs Output Power < 1kHz, THD+N 1%, A Single Ended Output, Both Channels Channel Separation R = ...

Page 9

Typical Performance Characteristics Power Supply Rejection Ratio V = 1.5V 200mV DD RIPPLE R = 8Ω, BTL L Input Terminated into 10Ω Power Supply Rejection Ratio V = 1.2V 200mV DD RIPPLE R = 8Ω, BTL ...

Page 10

Typical Performance Characteristics Supply Voltage vs Supply Current Noise Floor VDD = 1.5V, Single Ended Output 16Ω, 80kHz Bandwith Shutdown Hystresis Voltage V = 1.5V DD www.national.com (Continued) 200487F1 V DD 8Ω, 80kHz Bandwith 200487B7 Power Derating Curve 200487E1 10 ...

Page 11

Typical Performance Characteristics Mute Attenuation vs Load Resistance Application Information SINGLE ENDED (SE) CONFIGURATION EXPLANATION As shown in Figure 2, the LM4916 has two operational amplifiers internally, which have externally configurable gain. The closed loop gain of the two configurable ...

Page 12

Application Information down pin of the LM4916 is also being driven by an open drain output of an external microcontroller on a separate supply. This circuit ensures that shutdown is disabled when powering up the LM4916 by either allowing shutdown ...

Page 13

Application Information FIGURE 5. Turn-On, Shutdown, and Mute Timing for Cap-Coupled Mode POWER DISSIPATION Power dissipation is a major concern when designing a successful amplifier, whether the amplifier is bridged or single-ended. A direct consequence of the increased power delivered ...

Page 14

... Further detailed and specific information concerning PCB layout, fabrication, and mounting an LD (LLP) package is available from National Semiconductor’s Package Engineer- ing Group under application note AN1187. POWER SUPPLY BYPASSING As with any amplifier, proper supply bypassing is important for low noise performance and high power supply rejection ...

Page 15

Application Information limited frequency response reap little improvement by using a high value input capacitor. In addition to system cost and size, turn on time is affected by the size of the input coupling capacitor larger input ...

Page 16

Application Information f = 100Hz/5 = 20Hz 20kHz * 5 = 100kHz H As stated in the External Components section, R junction with C creates a i www.national.com ≥ (2π * 20kΩ * 20Hz) = ...

Page 17

Revision History Rev Date 1.0 7/11/03 1.1 7/25/06 Deleted the RL labels on curves E5, E6, E3, and E4, per Allan S., then re-released the D/S to the WEB. Description Re-released the D/S to the WEB. 17 www.national.com ...

Page 18

Physical Dimensions unless otherwise noted www.national.com inches (millimeters) MSOP Package Order Number LM4916MM NS Package Number MUB10A LD Package Order Number LM4916LD NS Package Number LDA10A 18 ...

Page 19

... BANNED SUBSTANCE COMPLIANCE National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C2) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/quality/green. ...

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