Datasheet

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LME49721

www.ti.com

SNAS371C –SEPTEMBER 2007–REVISED APRIL 2013

LME49721 High-Performance, High-Fidelity Rail-to-Rail Input/Output Audio Operational

Amplifier

Check for Samples: LME49721

FEATURES

DESCRIPTION

The LME49721 is a low-distortion, low-noise Rail-to-

• Rail-to-Rail Input and Output

Rail Input/Output operational amplifier optimized and

• Easily Drives 10kΩ Loads to Within 10mV of

fully specified for high-performance, high-fidelity

Each Power Supply Voltage

applications. Combining advanced leading-edge

• Optimized for Superior Audio Signal Fidelity

process technology with state-of-the-art circuit

design, the LME49721 Rail-to-Rail Input/Output

• Output Short Circuit Protection

operational amplifier delivers superior signal

amplification for outstanding performance. The

APPLICATIONS

LME49721 combines a very high slew rate with low

• Ultra High-Quality Portable Audio

THD+N to easily satisfy demanding applications. To

ensure that the most challenging loads are driven

Amplification

without compromise, the LME49721 has a high slew

• High-Fidelity Preamplifiers

rate of ±8.5V/μs and an output current capability of

• High-Fidelity Multimedia

±9.7mA. Further, dynamic range is maximized by an

• State-of-the-Art Phono Pre Amps

output stage that drives 10kΩ loads to within 10mV of

either power supply voltage.

• High-Performance Professional Audio

The LME49721 has a wide supply range of 2.2V to

• High-Fidelity Equalization and Crossover

5.5V. Over this supply range the LME49721’s input

Networks

circuitry maintains excellent common-mode and

• High-Performance Line Drivers

power supply rejection, as well as maintaining its low

• High-Performance Line Receivers

input bias current. The LME49721 is unity gain

stable.

• High-Fidelity Active Filters

• DAC I–V Converter

• ADC Front-End Signal Conditioning

KEY SPECIFICATIONS

• Power Supply Voltage Range: 2.2V to 5.5V

• Quiescent Current: 2.15mA (typ)

• THD+N (A

= 2, V

OUT

= 4V

p-p

, f

= 1kHz)

– R

= 2kΩ: 0.00008% (typ)

– R

= 600Ω: 0.0001% (typ)

• Input Noise Density: 4nV/√Hz (typ), @ 1kHz

• Slew Rate: ±8.5V/μs (typ)

• Gain Bandwidth Product: 20MHz (typ)

• Open Loop Gain (R

= 600Ω): 118dB (typ)

• Input Bias Current: 40fA (typ)

• Input Offset Voltage: 0.3mV (typ)

• PSRR: 103dB (typ)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (30 pages)

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LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 LME49721 High-Performance, High-Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier Check for Samples: LME49721 FEATURES DESCRIPTION • • The LME49721 is a low-distortion, low-noise Rail-toRail Input/Output operational amplifier optimized and fully specified for high-performance, high-fidelity applications.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com TYPICAL CONNECTION AND PINOUT OUTPUTA VDD INVERTING INPUT A - 1 8 2 7 + - VIN NON-INVERTING INPUT A + VSS VSS Figure 1. Buffer Amplifier VDD OUTPUTB + - +5V 3 6 4 5 INVERTING INPUT B NON-INVERTING INPUT B Figure 2. 8-Pin SOIC (D Package) These devices have limited built-in ESD protection.
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LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 ELECTRICAL CHARACTERISTICS FOR THE LME49721 The following specifications apply for the circuit shown in Figure 1. VS = 5V, RL = 10kΩ, RSOURCE = 10Ω, fIN = 1kHz, and TA = 25°C, unless otherwise specified. Symbol Parameter Conditions LME49721 Typical (1) Limit (2) Units (Limits) 0.001 % (max) Total Harmonic Distortion + Noise AV = +1, VOUT = 2Vp-p, RL = 2kΩ RL = 600Ω 0.0002 0.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS Graphs were taken in dual supply configuration. THD+N vs Frequency VS = ±2.5V, VOUT = 4VP-P RL = 2kΩ, AV = 2 0.1 0.1 0.01 0.01 THD+N (%) THD+N (%) THD+N vs Frequency VS = ±2.5V, VOUT = 4VP-P RL = 2kΩ, AV = 2, BW = 22kHz 0.001 0.0001 0.00001 20 0.001 0.0001 200 2k 0.00001 20 20k Figure 4. THD+N vs Frequency VS = ±2.
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LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Graphs were taken in dual supply configuration. THD+N vs Frequency VS = ±2.75V, VOUT = 4VP-P RL = 2kΩ, AV = 2, BW = 22kHz THD+N vs Frequency VS = ±2.75V, VOUT = 4VP-P RL = 2kΩ, AV = 2 0.01 0.01 THD+N (%) 0.1 THD+N (%) 0.1 0.001 0.0001 20 0.001 200 2k 0.0001 20 20k FREQUENCY (Hz) Figure 9. Figure 10. THD+N vs Frequency VS = ±2.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Graphs were taken in dual supply configuration. THD+N vs Output Voltage VS = ±1.1V RL = 2kΩ, AV = 2 THD+N vs Output Voltage VS = ±1.1V RL = 10kΩ, AV = 2 0.10 0.01 0.01 THD+N (%) THD+N (%) 0.10 0.001 0.0001 100m 0.001 0.0001 100m 1 200m 1 200m OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) Figure 15. Figure 16. THD+N vs Output Voltage VS = ±1.
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LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Graphs were taken in dual supply configuration. THD+N vs Output Voltage VS = ±2.5V RL = 10kΩ, AV = 2 0.1 0.1 0.01 0.01 THD+N (%) THD+N (%) THD+N vs Output Voltage VS = ±2.5V RL = 2kΩ, AV = 2 0.001 0.001 0.0001 0.00001 100m 0.0001 200m 1 0.00001 100m 2 Figure 22. THD+N vs Output Voltage VS = ±2.5V RL = 600Ω, AV = 2 THD+N vs Output Voltage VS = ±2.75V RL = 2kΩ, AV = 2 0.1 0.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Graphs were taken in dual supply configuration. +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 20 Crosstalk vs Frequency VS = ±1.1V VOUT = 2Vp-p RL = 10kΩ CROSSTALK (dB) CROSSTALK (dB) Crosstalk vs Frequency VS = ±1.
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LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 20 +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 20 CROSSTALK (dB) 100 200 1k 2k 10k 20k +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 20 Crosstalk vs Frequency VS = ±2.5V VOUT = 4Vp-p RL = 10kΩ 100 200 1k 2k FREQUENCY (Hz) FREQUENCY (Hz) Figure 33. Figure 34.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Graphs were taken in dual supply configuration. PSRR vs Frequency VS = ±1.1V VRIPPLE = 200mVP-P RL = 2kΩ 0 -20 -20 -40 -40 PSRR (dB) PSRR (dB) 0 -60 -80 -60 -80 -100 -100 -120 -120 -140 10 PSRR vs Frequency VS = ±1.1V VRIPPLE = 200mVP-P RL = 10kΩ -140 100 1000 10000 100000 10 FREQUENCY (Hz) PSRR vs Frequency VS = ±1.
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LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Graphs were taken in dual supply configuration. PSRR vs Frequency VS = ±2.5V VRIPPLE = 200mVP-P RL = 2kΩ 0 -20 -20 -40 -40 PSRR (dB) PSRR (dB) 0 -60 -80 -60 -80 -100 -100 -120 -120 -140 -140 10 0 100 1000 10000 10 100000 1000 10000 FREQUENCY (Hz) Figure 45. Figure 46. PSRR vs Frequency VS = ±2.5V VRIPPLE = 200mVP-P RL = 600Ω PSRR vs Frequency VS = ±2.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Graphs were taken in dual supply configuration. CMRR vs Frequency VS = ±1.5V RL = 10kΩ +0 +0 -20 -20 -40 -40 CMRR (dB) CMRR (dB) CMRR vs Frequency VS = ±1.5V RL = 2kΩ -60 -80 -80 -100 -100 -120 -120 200 2k 20k 200k 20 2k 20k FREQUENCY (Hz) Figure 51. Figure 52. CMRR vs Frequency VS = ±1.5V RL = 600Ω CMRR vs Frequency VS = ±2.
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LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Graphs were taken in dual supply configuration. CMRR vs Frequency VS = ±2.75V RL = 10kΩ +0 +0 -20 -20 -40 -40 CMRR (dB) CMRR (dB) CMRR vs Frequency VS = ±2.75V RL = 2kΩ -60 -60 -80 -80 -100 -100 -120 -120 20 200 2k 20k 200k 20 20k 200k FREQUENCY (Hz) Figure 57. Figure 58. CMRR vs Frequency VS = ±2.75V RL = 600Ω Output Voltage Swing Neg vs Power Supply RL = 2kΩ 0.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Graphs were taken in dual supply configuration. Output Voltage Swing Pos vs Power Supply RL = 2kΩ Output Voltage Swing Pos vs Power Supply RL = 10kΩ 3.0 OUTPUT VOLTAGE SWING (V) OUTPUT VOLTAGE SWING (V) 3.0 2.5 2.0 1.5 1.0 0.5 2.5 2.0 1.5 1.0 0.5 0.0 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 0.0 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Figure 63.
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LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 APPLICATION INFORMATION DISTORTION MEASUREMENTS The vanishingly low residual distortion produced by LME49721 is below the capabilities of all commercially available equipment. This makes distortion measurements just slightly more difficult than simply connecting a distortion meter to the amplifier's inputs and outputs. The solution. however, is quite simple: an additional resistor.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com R1 VIN R2 VDD VDD R3 VOUT VCM + R4 Figure 70. Single-Supply Inverting Op Amp Figure 71 shows the typical connection for a dual supply inverting amplifier. The output voltage is centered on zero. VIN R2 R1 VDD - VOUT + VSS Figure 71. Dual-Supply Inverting Op Amp Figure 72 shows the typical connection for the Buffer Amplifier or also called a Voltage Follower.
PAGE 17
LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 TYPICAL APPLICATIONS AV = 34.5 F = 1 kHz En = 0.38 μV A Weighted Figure 73. ANAB Preamp Figure 74. NAB Preamp Voltage Gain vs Frequency VO = V1–V2 Figure 75.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com VO = V1 + V2 − V3 − V4 Figure 76. Adder/Subtracter Figure 77. Sine Wave Oscillator Illustration is f0 = 1 kHz Figure 78.
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LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 Illustration is f0 = 1 kHz Figure 79. Second-Order Low-Pass Filter (Butterworth) Illustration is f0 = 1 kHz, Q = 10, ABP = 1 Figure 80. State Variable Filter Figure 81.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com Figure 82. 2-Channel Panning Circuit (Pan Pot) Figure 83.
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LME49721 www.ti.com SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 Illustration is: fL = 32 Hz, fLB = 320 Hz fH =11 kHz, fHB = 1.1 kHz Figure 84. Tone Control Av = 35 dB En = 0.33 μV S/N = 90 dB f = 1 kHz A Weighted A Weighted, VIN = 10 mV @f = 1 kHz Figure 85.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com Illustration is: V0 = 101(V2 − V1) Figure 86.
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LME49721 www.ti.com A. SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 See Table 1. Figure 87. 10-Band Graphic Equalizer Table 1. C1, C2, R1, and R2 Values for Figure 87 (1) (1) fo (Hz) C1 C2 R1 R2 32 0.12μF 4.7μF 75kΩ 500Ω 64 0.056μF 3.3μF 68kΩ 510Ω 125 0.033μF 1.5μF 62kΩ 510Ω 250 0.015μF 0.82μF 68kΩ 470Ω 500 8200pF 0.39μF 62kΩ 470Ω 1k 3900pF 0.22μF 68kΩ 470Ω 2k 2000pF 0.1μF 68kΩ 470Ω 4k 1100pF 0.056μF 62kΩ 470Ω 8k 510pF 0.
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LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com REVISION HISTORY 24 Rev Date 1.0 09/26/07 Description Initial release. 1.1 10/01/07 Input more info under the Buffer Amplifier. 1.2 04/21/10 Added the Ordering Information table. C 04/04/13 Changed layout of National Data Sheet to TI format.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device LME49721MAX/NOPB Package Package Pins Type Drawing SOIC D 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 12.4 Pack Materials-Page 1 6.5 B0 (mm) K0 (mm) P1 (mm) 5.4 2.0 8.0 W Pin1 (mm) Quadrant 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LME49721MAX/NOPB SOIC D 8 2500 349.0 337.0 45.
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