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. Combining advanced leading-edge process technology with state-of-the-art circuit design, the LME49721 Rail-to-Rail Input/Output operational amplifier delivers superior signal amplification for outstanding performance. The LME49721 combines a very high slew rate with low THD+N to easily satisfy demanding applications. To ensure that the most challenging loads are driven without compromise, the LME49721 has a high slew rate of ±8.5V/μs and an output current capability of ±9.7mA. Further, dynamic range is maximized by an output stage that drives 10kΩ loads to within 10mV of either power supply voltage. 1 2 • • Rail-to-Rail Input and Output Easily Drives 10kΩ Loads to Within 10mV of Each Power Supply Voltage Optimized for Superior Audio Signal Fidelity Output Short Circuit Protection APPLICATIONS • • • • • • • • • • • Ultra High-Quality Portable Audio Amplification High-Fidelity Preamplifiers High-Fidelity Multimedia State-of-the-Art Phono Pre Amps High-Performance Professional Audio High-Fidelity Equalization and Crossover Networks High-Performance Line Drivers High-Performance Line Receivers High-Fidelity Active Filters DAC I–V Converter ADC Front-End Signal Conditioning The LME49721 has a wide supply range of 2.2V to 5.5V. Over this supply range the LME49721’s input circuitry maintains excellent common-mode and power supply rejection, as well as maintaining its low input bias current. The LME49721 is unity gain stable. KEY SPECIFICATIONS • • • • • • • • • • Power Supply Voltage Range: 2.2V to 5.5V Quiescent Current: 2.15mA (typ) THD+N (AV = 2, VOUT = 4Vp-p, f IN = 1kHz) – RL = 2kΩ: 0.00008% (typ) – RL = 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 (RL = 600Ω): 118dB (typ) Input Bias Current: 40fA (typ) Input Offset Voltage: 0.3mV (typ) PSRR: 103dB (typ) 1 2 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. All 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. Copyright © 2007–2013, Texas Instruments Incorporated 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. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ABSOLUTE MAXIMUM RATINGS (1) (2) (3) Power Supply Voltage (VS = V+ - V-) 6V −65°C to 150°C Storage Temperature Input Voltage (V-) - 0.7V to (V+) + 0.7V Output Short Circuit (4) Continuous Power Dissipation Internally Limited ESD Rating (5) 2000V ESD Rating (6) 200V Junction Temperature 150°C Thermal Resistance, θJA (SOIC) 165°C/W Temperature Range, TMIN ≤ TA ≤ TMAX –40°C ≤ TA ≤ 85°C 2.2V ≤ VS ≤ 5.5V Supply Voltage Range (1) (2) (3) (4) (5) (6) 2 “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the device should not be operated beyond such conditions. All voltages are measured with respect to the ground pin, unless otherwise specified The Electrical Characteristics table lists ensured specifications under the listed Recommended Operating Conditions except as otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not ensured. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and specifications. The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature, TA. The maximum allowable power dissipation is PDMAX = (TJMAX - TA) / θJA or the number given in Absolute Maximum Ratings, whichever is lower. Human body model, applicable std. JESD22-A114C. Machine model, applicable std. JESD22-A115-A. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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 0.0002 IMD Intermodulation Distortion AV = +1, VOUT = 2Vp-p, Two-tone, 60Hz & 7kHz 4:1 0.0004 GBWP Gain Bandwidth Product SR Slew Rate AV = +1 8.5 V/μs (min) FPBW Full Power Bandwidth VOUT = 1VP-P, –3dB referenced to output magnitude at f = 1kHz 2.2 MHz ts Settling time AV = 1, 4V step 0.1% error range 800 ns Equivalent Input Noise Voltage fBW = 20Hz to 20kHz, A-weighted .707 1.13 μVP-P (max) Equivalent Input Noise Density f = 1kHz A-weighted 4 6 nV/√Hz (max) In Current Noise Density f = 10kHz VOS Offset Voltage 1.5 mV (max) ΔVOS/ΔTemp Average Input Offset Voltage Drift vs Temperature PSRR Average Input Offset Voltage Shift vs Power Supply Voltage ISOCH-CH Channel-to-Channel Isolation fIN = 1kHz 117 dB IB Input Bias Current VCM = VS/2 40 fA ΔIOS/ΔTemp Input Bias Current Drift vs Temperature –40°C ≤ TA ≤ 85°C 48 fA/°C IOS Input Offset Current VCM = VS/2 60 THD+N en VIN-CM Common-Mode Input Voltage Range CMRR Common-Mode Rejection 20 VSS - 100mV < VCM < VDD + 100mV 93 MHz (min) fA/√Hz μV/°C 1.1 103 1/f Corner Frequency 15 4.0 0.3 40°C ≤ TA ≤ 85°C % 85 dB (min) fA (V+) – 0.1 (V-) + 0.1 V (min) 70 dB (min) 2000 Hz VSS - 200mV < VOUT < VDD + 200mV AVOL Open Loop Voltage Gain RL = 600Ω 118 RL = 2kΩ 122 RL = 10kΩ 130 115 dB (min) VDD – 30mV VDD – 80mV V (min) RL = 600Ω VOUTMIN Output Voltage Swing RL = 10kΩ, VS = 5.0V IOUT Output Current IOUT-SC Short Circuit Current RL = 250Ω, VS = 5.0V ROUT Output Impedance fIN = 10kHz Closed-Loop Open-Loop IS Quiescent Current per Amplifier IOUT = 0mA (1) (2) 100 dB (min) dB (min) VSS + 30mV VSS + 80mV V (min) VDD – 10mV VDD – 20mV V (min) VSS + 10mV VSS + 20mV V (min) 9.7 9.3 mA (min) 100 mA 0.01 46 Ω 2.15 3.25 mA (max) Typical values represent most likely parametric norms at TA = +25ºC, and at the Recommended Operation Conditions at the time of product characterization and are not ensured. Datasheet min/max specification limits are ensured by test or statistical analysis. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 3 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 = ±2.5V, VOUT = 4VP-P RL = 10kΩ, AV = 2, BW = 22kHz THD+N vs Frequency VS = ±2.5V, VOUT = 4VP-P RL = 10kΩ, AV = 2 0.1 0.1 0.01 0.01 0.001 0.0001 0.00001 20 0.0001 200 2k 0.00001 20 20k Figure 6. THD+N vs Frequency VS = ±2.5V, VOUT = 4VP-P RL = 600Ω, AV = 2, BW = 22kHz THD+N vs Frequency VS = ±2.5V, VOUT = 4VP-P RL = 600Ω, AV = 2 0.1 0.1 0.01 0.01 THD+N (%) THD+N (%) 200 2k FREQUENCY (Hz) Figure 5. 0.001 0.0001 20k 0.001 0.0001 200 2k FREQUENCY (Hz) 20k 0.00001 20 Figure 7. 4 20k 0.001 FREQUENCY (Hz) 0.00001 20 200 2k FREQUENCY (Hz) Figure 3. THD+N (%) THD+N (%) FREQUENCY (Hz) 200 2k FREQUENCY (Hz) 20k Figure 8. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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 = ±2.75V, VOUT = 4VP-P RL = 10kΩ, AV = 2, BW = 22kHz THD+N vs Frequency VS = ±2.75V, VOUT = 4VP-P RL = 10kΩ, AV = 2 0.01 0.01 THD+N (%) 0.1 THD+N (%) 0.1 200 2k 0.0001 20 20k 2k Figure 11. Figure 12. THD+N vs Frequency VS = ±2.75V, VOUT = 4VP-P RL = 600Ω, AV = 2, BW = 22kHz THD+N vs Frequency VS = ±2.75V, VOUT = 4VP-P RL = 600Ω, AV = 2 0.1 0.1 0.01 0.01 THD+N (%) THD+N (%) 200 20k FREQUENCY (Hz) FREQUENCY (Hz) 0.001 0.001 0.0001 0.0001 0.00001 20 20k 0.001 0.001 0.0001 20 200 2k FREQUENCY (Hz) 200 2k 20k 0.00001 20 200 2k 20k FREQUENCY (Hz) FREQUENCY (Hz) Figure 13. Figure 14. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 5 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 = ±1.1V RL = 600Ω, AV = 2 THD+N vs Output Voltage VS = ±1.5V RL = 2kΩ, AV = 2 0.1 0.10 0.01 THD+N (%) THD+N (%) 0.01 0.001 0.001 0.0001 0.0001 100m 0.00001 100m 1 200m Figure 18. THD+N vs Output Voltage VS = ±1.5V RL = 10kΩ, AV = 2 THD+N vs Output Voltage VS = ±1.5V RL = 600Ω, AV = 2 0.1 0.01 0.01 0.001 0.001 0.0001 0.0001 200M 1 2 0.00001 100m 200m 1 2 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) Figure 19. 6 2 OUTPUT VOLTAGE (V) 0.1 0.00001 100M 1 Figure 17. THD+N (%) THD+N (%) OUTPUT VOLTAGE (V) 200m Figure 20. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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 0.01 0.01 0.001 0.001 0.0001 0.0001 200m 1 0.00001 100m 2 200m 1 2 3 2 3 OUTPUT VOLTAGE (V) Figure 23. Figure 24. THD+N vs Output Voltage VS = ±2.75V RL = 10kΩ, AV = 2 THD+N vs Output Voltage VS = ±2.75V RL = 600Ω, AV = 2 0.1 0.1 0.01 0.01 THD+N (%) THD+N (%) OUTPUT VOLTAGE (V) 0.001 0.0001 0.00001 100m 2 OUTPUT VOLTAGE (V) 0.1 0.00001 100m 1 Figure 21. THD+N (%) THD+N (%) OUTPUT VOLTAGE (V) 200m 0.001 0.0001 200m 1 2 3 0.00001 100m OUTPUT VOLTAGE (V) 200m 1 OUTPUT VOLTAGE (V) Figure 25. Figure 26. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 7 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 = ±1.1V VOUT = 2Vp-p RL = 2kΩ 100 200 1k 2k 10k 20k +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 vs Frequency VS = ±1.1V VOUT = 2Vp-p RL = 600Ω Crosstalk vs Frequency VS = ±1.5V, VOUT = 2Vp-p RL = 2kΩ 100 200 1k 2k 10k 20k +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 20 100 200 1k 2k Figure 29. Figure 30. Crosstalk vs Frequency VS = ±1.5V VOUT = 2Vp-p RL = 10kΩ Crosstalk vs Frequency VS = ±1.5V VOUT = 2Vp-p RL = 600Ω 100 200 1k 2k 10k 20k FREQUENCY (Hz) CROSSTALK (dB) CROSSTALK (dB) 8 10k 20k Figure 28. FREQUENCY (Hz) +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 20 100 200 1k 2k FREQUENCY (Hz) Figure 27. CROSSTALK (dB) CROSSTALK (dB) FREQUENCY (Hz) 10k 20k +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 20 100 200 1k 2k FREQUENCY (Hz) FREQUENCY (Hz) Figure 31. Figure 32. Submit Documentation Feedback 10k 20k Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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. Crosstalk vs Frequency VS = ±2.5V VOUT = 4Vp-p RL = 600Ω Crosstalk vs Frequency VS = ±2.75V VOUT = 4Vp-p RL = 2kΩ CROSSTALK (dB) +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 = 2kΩ 100 200 1k 2k 10k 20k +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 20 100 200 1k 2k FREQUENCY (Hz) FREQUENCY (Hz) Figure 35. Figure 36. Crosstalk vs Frequency VS = ±2.75V VOUT = 4Vp-p RL = 10kΩ Crosstalk vs Frequency VS = ±2.75V VOUT = 4Vp-p RL = 600Ω CROSSTALK (dB) CROSSTALK (dB) CROSSTALK (dB) CROSSTALK (dB) Graphs were taken in dual supply configuration. 100 200 1k 2k 10k 20k +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 20 100 200 1k 2k FREQUENCY (Hz) FREQUENCY (Hz) Figure 37. Figure 38. 10k 20k 10k 20k 10k 20k Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 9 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 = ±1.1V VRIPPLE = 200mVP-P RL = 600Ω PSRR vs Frequency VS = ±1.5V VRIPPLE = 200mVP-P RL = 2kΩ 0 -40 -40 -60 -80 -80 -100 -120 -120 -140 100 1000 10000 10 100000 100 1000 10000 FREQUENCY (Hz) FREQUENCY (Hz) Figure 41. Figure 42. PSRR vs Frequency VS = ±1.5V VRIPPLE = 200mVP-P RL = 10kΩ PSRR vs Frequency VS = ±1.5V VRIPPLE = 200mVP-P RL = 600Ω 0 -20 -20 -40 -40 -60 -80 100000 -60 -80 -100 -100 -120 -120 -140 -140 10 100 1000 10000 100000 FREQUENCY (Hz) 10 100 1000 10000 100000 FREQUENCY (Hz) Figure 43. 10 100000 -60 -100 PSRR (dB) PSRR (dB) Figure 40. -20 0 10000 FREQUENCY (Hz) -20 -140 10 1000 Figure 39. PSRR (dB) PSRR (dB) 0 100 Figure 44. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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 = ±2.75V VRIPPLE = 200mVP-P RL = 2kΩ 0 -20 -20 -40 -40 -60 -80 100000 -60 -80 -100 -100 -120 -120 -140 -140 10 100 1000 10000 10 100000 FREQUENCY (Hz) 0 100 1000 10000 100000 FREQUENCY (Hz) Figure 47. Figure 48. PSRR vs Frequency VS = ±2.75V VRIPPLE = 200mVP-P RL = 10kΩ PSRR vs Frequency VS = ±2.75V VRIPPLE = 200mVP-P RL = 600Ω 0 -20 -20 -40 -40 PSRR (dB) PSRR (dB) 100 FREQUENCY (Hz) PSRR (dB) PSRR (dB) PSRR vs Frequency VS = ±2.5V VRIPPLE = 200mVP-P RL = 10kΩ -60 -80 -60 -80 -100 -100 -120 -120 -140 -140 10 100 1000 10000 100000 10 100 1000 10000 100000 FREQUENCY (Hz) FREQUENCY (Hz) Figure 49. Figure 50. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 11 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 = ±2.5V RL = 2kΩ +0 +0 -20 -20 -40 -40 -60 200k -60 -80 -80 -100 -100 -120 -120 20 200 2k 20k 200k 20 200 2k 20k FREQUENCY (Hz) FREQUENCY (Hz) Figure 53. Figure 54. CMRR vs Frequency VS = ±2.5V RL = 10kΩ CMRR vs Frequency VS = ±2.5V RL = 600Ω +0 +0 -20 -20 -40 -40 CMRR (dB) CMRR (dB) 200 FREQUENCY (Hz) CMRR (dB) CMRR (dB) 20 -60 200k -60 -80 -80 -100 -100 -120 -120 20 12 -60 200 2k 20k 200k 20 200 2k 20k FREQUENCY (Hz) FREQUENCY (Hz) Figure 55. Figure 56. Submit Documentation Feedback 200k Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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 0.0 OUTPUT VOLTAGE SWING (V) -20 -40 CMRR (dB) 2k FREQUENCY (Hz) +0 -60 -80 -100 -120 20 200 2k 20k -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 200k FREQUENCY (Hz) SUPPLY VOLTAGE (V-) Figure 59. Figure 60. Output Voltage Swing Neg vs Power Supply RL = 10kΩ Output Voltage Swing Neg vs Power Supply RL = 600Ω 0.0 OUTPUT VOLTAGE SWING (V) 0.0 OUTPUT VOLTAGE SWING (V) 200 -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 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 61. Figure 62. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 13 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. Figure 64. Output Voltage Swing Pos vs Power Supply RL = 600Ω Supply Current per amplifier vs Power Supply RL = 2kΩ, Dual Supply 3.5 3.0 2.5 SUPPLY CURRENT (mA) OUTPUT VOLTAGE SWING (V) 3.0 2.0 1.5 1.0 2.5 2.0 1.5 1.0 0.5 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 1.10 1.25 1.50 1.75 2.00 2.25 2.50 2.75 POWER SUPPLY (V) SUPPLY VOLTAGE (V) Figure 65. Figure 66. Supply Current per amplifier vs Power Supply RL = 10kΩ, Dual Supply Supply Current per amplifier vs Power Supply RL = 600Ω, Dual Supply 3.5 8.0 7.0 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 3.0 2.5 2.0 1.5 1.0 5.0 4.0 3.0 2.0 0.5 1.0 0.0 1.10 1.25 1.50 1.75 2.00 2.25 2.50 2.75 0.0 1.10 1.25 1.50 1.75 2.00 2.25 2.50 2.75 POWER SUPPLY (V) POWER SUPPLY (V) Figure 67. 14 6.0 Figure 68. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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. Adding this resistor extends the resolution of the distortion measurement equipment. The LME49721's low residual is an input referred internal error. As shown in Figure 69, adding the 10Ω resistor connected between a the amplifier's inverting and non-inverting inputs changes the amplifier's noise gain. The result is that the error signal (distortion) is amplified by a factor of 101. Although the amplifier's closed-loop gain is unaltered, the feedback available to correct distortion errors is reduced by 101. To ensure minimum effects on distortion measurements, keep the value of R1 low as shown in Figure 69. This technique is verified by duplicating the measurements with high closed-loop gain and/or making the measurements at high frequencies. Doing so, produces distortion components that are within equipments capabilities. This datasheet's THD+N and IMD values were generated using the above described circuit connected to an Audio Precision System Two Cascade. R2 1 k: R1 1 k: R3 10: LME49721 + Generator Output Distortion Signal Gain = 1 + (R2/R3) Analyzer Input Audio Precision System Two Cascade Figure 69. THD+N and IMD Distortion Test Circuit with AV = 2 OPERATING RATINGS AND BASIC DESIGN GUIDELINES The LME49721 has a supply voltage range from +2.2V to +5.5V single supply or ±1.1 to ±2.75V dual supply. Bypassed capacitors for the supplies should be placed as close to the amplifier as possible. This will help minimize any inductance between the power supply and the supply pins. In addition to a 10μF capacitor, a 0.1μF capacitor is also recommended in CMOS amplifiers. The amplifier's inputs lead lengths should also be as short as possible. If the op amp does not have a bypass capacitor, it may oscillate. BASIC AMPLIFIER CONFIGURATIONS The LME49721 may be operated with either a single supply or dual supplies. Figure 70 shows the typical connection for a single supply inverting amplifier. The output voltage for a single supply amplifier will be centered around the common-mode voltage Vcm. Note: the voltage applied to the Vcm insures the output stays above ground. Typically, the Vcm should be equal to VDD/2. This is done by putting a resistor divider ckt at this node, see Figure 70. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 15 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. A Buffer Amplifier can be used to solve impedance matching problems, to reduce power consumption in the source, or to drive heavy loads. The input impedance of the op amp is very high. Therefore, the input of the op amp does not load down the source. The output impedance on the other hand is very low. It allows the load to either supply or absorb energy to a circuit while a secondary voltage source dissipates energy from a circuit. The Buffer is a unity stable amplifier, 1V/V. Although the feedback loop is tied from the output of the amplifier to the inverting input, the gain is still positive. Note: if a positive feedback is used, the amplifier will most likely drive to either rail at the output. VDD - VOUT VIN + Figure 72. Buffer 16 Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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. Balanced to Single-Ended Converter Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 17 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. Second-Order High-Pass Filter (Butterworth) 18 Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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. AC/DC Converter Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 19 LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com Figure 82. 2-Channel Panning Circuit (Pan Pot) Figure 83. Line Driver 20 Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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. RIAA Preamp Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 21 LME49721 SNAS371C – SEPTEMBER 2007 – REVISED APRIL 2013 www.ti.com Illustration is: V0 = 101(V2 − V1) Figure 86. Balanced Input Mic Amp 22 Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 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 0.022μF 68kΩ 510Ω 16k 330pF 0.012μF 51kΩ 510Ω At volume of change = ±12 dB Q = 1.7 Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 23 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. Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LME49721 PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish (2) MSL Peak Temp Op Temp (°C) Top-Side Markings (3) (4) LME49721MA/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 L49721 MA LME49721MAX/NOPB ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 L49721 MA (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. 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Addendum-Page 1 Samples 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 12.0 Q1 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 45.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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