LME49610

Manufacturer Part NumberLME49610
ManufacturerTexas Instruments
LME49610 datasheet
 


Specifications of LME49610

Supplymin(min)(volt)5Supplymax(max)(volt)44
ShutdownNoHeadphonechannelsMono
Vmax(v)44Thd+n@1khz(%)0.00003
Vmin(v)5Numberofchannels1
Gbw(typ)(mhz)200Vnatflatband(typ)(nv/rthz)3
Pin/package5PFM  
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LME49610
LME49610 High Performance, High Fidelity, High Current Audio Buffer
Literature Number: SNAS435A

LME49610 Summary of contents

  • Page 1

    ... LME49610 LME49610 High Performance, High Fidelity, High Current Audio Buffer Literature Number: SNAS435A ...

  • Page 2

    ... High Performance, High Fidelity, High Current Audio Buffer General Description The LME49610 is a high performance, low distortion high fi- delity 250mA audio buffer. The LME49610 is designed for a wide range of applications. When used inside the feedback loop amp, it increases output current, improves ca- pacitive load drive, and eliminates thermal feedback ...

  • Page 3

    ... Connection Diagrams www.national.com TO-263 Package (Note 9) 30042539 Top View Order Number LME49610TS See NS Package Number TS5B 30042542 Top View U — Wafer fabrication code Z — Assembly plant XY — 2 Digit date code TT — Lot traceability 2 ...

  • Page 4

    ... L 3 4°C/W 65°C/W 20°C/W (Note 1, Note 2) ≤ ≤ T −40°C T MAX A ±2.25V to ±22V = ±22V 1kHz 1kΩ, unless LME49610 Units Typical Limit (Limits) (Note 6) (Note (max (max) 0.000035 0.0005 2000 V/μs 110 MHz 120 MHz 180 ...

  • Page 5

    ... Note 7: Datasheet min/max specification limits are guaranteed by test or statistical analysis. Note 8: This is the distortion of the LME49610 operating in a closed loop configuration with an LME49710. When operating in an operational amplifier's feedback loop, the amplifier's open loop gain dominates, linearizing the system and determining the overall system distortion. ...

  • Page 6

    Typical Performance Characteristics Gain vs Frequency vs Quiescent Current V = ±22V S Gain vs Frequency vs Power Supply Voltage Wide BW Mode (BW pin = V Gain vs Frequency vs Power Supply Voltage Low I Mode (BW pin = ...

  • Page 7

    Gain vs Frequency vs R Wide BW Mode (BW pin = V Gain vs Frequency vs R Low I Mode (BW pin = Float Gain vs Frequency vs Quiescent Current V = ±15V S www.national.com LOAD ), V ...

  • Page 8

    Gain vs Frequency vs R LOAD Wide BW Mode (BW pin = ±15V EE S Gain vs Frequency vs R LOAD Low I Mode (BW pin = Float ±15V Q S +PSRR vs Frequency ...

  • Page 9

    Frequency V = ±15V and ±22V, Wide BW Mode S (BW pin = V Quiescent Current vs Bandwidth Control Resistance V = ±15V (Bottom) & Wide BW Noise Curve (BW pin = V www.national.com ) EE ...

  • Page 10

    ... Typical Application Diagram FIGURE 2. High Performance, High Fidelity LME49610 Audio Buffer Application 9 30042540 www.national.com ...

  • Page 11

    ... The following describes the circuit operation for the head- phone amplifier’s Left Channel. The Right Channel operates identically. FIGURE 3. LME49610 delivers high output current for this high performance headphone amplifier www.national.com The audio input signal is applied to the input jack (HP31 or J1/J2) and dc-coupled to the volume control, VR1. The output signal from VR1’ ...

  • Page 12

    ... SUPPLY BYPASSING The LME49610 will place great demands on the power supply voltage source when operating in applications that require fast slewing and driving heavy loads. These conditions can create high amplitude transient currents. A power supply’s limited bandwidth can reduce the supply’ ...

  • Page 13

    ... To ensure that the operational amplifier and buffer system are closed loop stable, the phase shift must be low. For a system gain of one, the LME49610 must contribute less than 20° at the operational amplifier’s unity-gain frequency. Various op- erating conditions may change or increase the total system phase shift ...

  • Page 14

    ... A copper plane may be placed directly beneath the tab. Ad- ditionally, a matching plane can be placed on the opposite side plane is placed on the side opposite of the LME49610, connect it to the plane to which the buffer’s metal tab is soldered with a matrix of thermal vias per JEDEC Stan- dard JESD51-5. ...

  • Page 15

    ... Output voltages with high slew rates will require large output load currents. For example if the part is required to slew at 1000V/μs with a load capacitance of 1nF, the current de- manded from the LME49610 is 1A. Therefore, fast slew rate is incompatible with a capacitive load of this value. Also ...

  • Page 16

    FIGURE 7. High Speed Positive and Negative Regulator 15 300425a7 www.national.com ...

  • Page 17

    Revision History Rev 1.0 1.01 www.national.com Date 04/09/08 Initial WEB released. 10/28/09 Typical and Limit changes on the Short Circuit Output current. 16 Description ...

  • Page 18

    ... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LME49610TS See NS Package TS5B 17 www.national.com ...

  • Page 19

    For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo ...

  • Page 20

    ... 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’ ...