LM4859

Manufacturer Part NumberLM4859
ManufacturerTexas Instruments
LM4859 datasheet
 


Specifications of LM4859

Speaker ChannelsStereoSpeaker Output Power/ch(w)1.2
Speaker Psrr(db)70Headphone Output Power/ch(mw)75
Headphone Psrr(db)87Audio Mode ControlI2C
Supply Voltage(min)(v)2.7Supply Voltage(max)(v)5.5
Pin/package28QFN, 28UQFN, 28WQFN, 30DSBGA  
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LM4859
LM4859 Stereo 1.2W Audio Sub-system with 3D Enhancement
Literature Number: SNAS256D

LM4859 Summary of contents

  • Page 1

    ... LM4859 LM4859 Stereo 1.2W Audio Sub-system with 3D Enhancement Literature Number: SNAS256D ...

  • Page 2

    ... Other features include an ultra-low current shutdown mode and thermal shutdown protection. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components. The LM4859 is available in a 30–bump TL package and a 28–lead LLP package. Boomer ® registered trademark of National Semiconductor Corporation. ...

  • Page 3

    Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com 2 20106101 ...

  • Page 4

    ... Right Stereo Input Connect LLS+ Left Loudspeaker Positive Output V Power Supply DD RLS3D Right Loudspeaker 3D L Left Stereo Input IN LHP Left Headphone Output 3 micro SMD Marking 20106163 Top View Digit date code TT - Die run traceability G - Boomer Family F1 - LM4859TL Pin Description www.national.com ...

  • Page 5

    ... Connection Diagram www.national.com 28 – Lead SP Package Top View Order Number LM4859SP See NS Package Number SPA28A 4 20106199 ...

  • Page 6

    Pin Connections (SP) Pin Name RHP Right Headphone Output V Power Supply ...

  • Page 7

    ... Speaker; Mode Speaker; Mode 12, 13, Headphone; Mode Headphone; Mode 13 ≤ T −40˚C ≤ T ≤ +85˚C MAX A 2.7V ≤ 2.5V ≤ (Notes 25˚C. A LM4859 (Limits) Typical Limits (Notes (Note (max (max) 0.2 3 µA (max) 1.6 1.2 0.9 W (min) ...

  • Page 8

    ... Speaker; Mode 12, 13, Headphone; Mode Headphone; Mode 13 (Notes 1, 2) (Continued) = 25˚C. A LM4859 Typical Limits (Notes (Note 120 230 = 3.0V (Notes 25˚C. A LM4859 Typical Limits (Notes (Note 4.5 7.5 mA (max) 11 (max) 0.06 2.5 µA (max) 530 400 320 mW (min (min) 0 ...

  • Page 9

    ... Limits DD LM4859 Units (Limits) Typical Limits (Notes (Note 2.5 µs (min) 100 ns (min (min) 100 ns (min) 100 ns (min) ...

  • Page 10

    ... National 3D Enhancement section for information on selecting the value of C (Notes 1, 2) (Continued and 2.5V ≤ and Conditions ) / θ the number given in Absolute Maximum Ratings, whichever is lower. For the LM4859 operating in Mode area of 10oz printed circuit board ground plane and R set at 0dB ...

  • Page 11

    ... LLS, RLS 1kHz 4Ω; Mode 7; 0dB Gain L www.national.com (Note 11) 20106155 = 400mW; O 20106157 10 LM4859SP THD+N vs Frequency 20106156 V = 3V; LLS, RLS 200mW 4Ω; Mode 7; 0dB Gain L LM4859SP THD+N vs Output Power 20106158 V = 3V; LLS, RLS 1kHz 4Ω; Mode 7; 0dB Gain L ...

  • Page 12

    Typical Performance Characteristics THD+N vs Frequency V = 5V; LLS, RLS 400mW 8Ω; Mode 7; 0dB Gain L THD+N vs Frequency V = 5V; LHP, RHP 32Ω; Mode 9; ...

  • Page 13

    Typical Performance Characteristics THD+N vs Output Power V = 5V; LLS, RLS 1kHz 8Ω; Mode 7; 0dB Gain L THD+N vs Output Power V = 5V; LHP, RHP 1kHz 32Ω; ...

  • Page 14

    Typical Performance Characteristics PSRR vs Frequency V = 5V; LLS, RLS 8Ω; 0db Gain All audio inputs terminated Top-Mode 12, 13; Mid-Mode 2, 3; Bot-Mode 7, 8 PSRR vs Frequency V = 5V; LHP, RHP; R ...

  • Page 15

    Typical Performance Characteristics Crosstalk vs Frequency V = 5V; LLS, RLS 400mW Mode 7; 0db Gain; 3D off Top-Left to Right; Bot-Right to Left Crosstalk vs Frequency V = 5V; LHP, RHP 15mW; ...

  • Page 16

    Typical Performance Characteristics Frequency vs Response LLS, RLS 8Ω; L Mode 2; Full Gain Frequency vs Response LHP, RHP 32Ω Mode 4; Full Gain (Note 11) (Continued) 20106138 20106140 = 100µF LHP, RHP; ...

  • Page 17

    Typical Performance Characteristics Power Dissipation vs Output Power = 8Ω; THD+N ≤ 1% LLS, RLS Top-V = 5V; Bot-V DD per channel Output Power vs Load Resistance LLS, RLS 8Ω; L Top-V = 5V, 10% THD+N; ...

  • Page 18

    Typical Performance Characteristics Output Power vs Supply Voltage LLS, RLS 8Ω; L Top–10% THD+N; Bot–1% THD+N (Note 11) (Continued) Output Power vs Supply Voltage 20106152 LHP, RHP; R Top–10% THD+N; Bot–1% THD+N 17 20106153 = 32Ω; L www.national.com ...

  • Page 19

    Application Information A7 A6 Chip Address 1 ADR = 0 1 ADR = externally configured by ADR pin Mono Volume control Left Volume control Right Volume control Mode control www.national.com 2 FIGURE Bus ...

  • Page 20

    Application Information MD4 MD3 ...

  • Page 21

    Application Information LD4//RD4 LD3//RD3 ...

  • Page 22

    Application Information Mode CD3 CD2 ...

  • Page 23

    ... If the data line is not held low during the acknowledge clock pulse, then the mas- ter should abort the rest of the data transfer to the LM4859. The 8 bits of data are sent next, most significant bit first. ...

  • Page 24

    ... For this discussion, only the LLS bridge- tied amplifier pair will be referred to. The LM4859 drives a load, such as a speaker, connected between outputs, LLS+ and LLS-. In the LLS amplifier block, the output of the amplifier that drives LLS- serves as the input to the unity gain inverting amplifier that drives LLS+ ...

  • Page 25

    ... C B times the value of C eliminated when the LM4859 transitions in and out of shut- down mode. Connecting a 2.2µF capacitor, C BYPASS pin and ground improves the internal bias voltage’s stability and improves the amplifier’s PSRR. The PSRR im- provements increase as the bypass pin capacitor value in- creases ...

  • Page 26

    Application Information FIGURE 4. Reference Design Board Schematic (Continued) 25 20106102 www.national.com ...

  • Page 27

    Demonstration Board Layout Recommended SP PCB Layout: Silkscreen Layer Recommended SP PCB Layout: Mid Layer www.national.com 20106162 Recommended SP PCB Layout: 20106161 Recommended SP PCB Layout: Bottom Layer 26 20106159 Top Layer 20106160 ...

  • Page 28

    Revision History Rev 1.1 1.2 Date 6/02/05 Added Modes 9 and 14 into Mode 4 (Conditions) for the Idd under Elect.Char tables 5V and 3V, then re-released D/S to the WEB (per Alvin Fok). (MC) 06/06/06 Edited the micro SMD ...

  • Page 29

    ... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 30 Bump TL Package Order Number LM4859TL NS Package Number TLA30CZA 28 ...

  • Page 30

    ... Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 28 – Lead SP Package Order Number LM4859SP NS Package Number SPA28A 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...

  • Page 31

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...