LME49722MA

LME49722 Low Noise, High Performance, High Fidelity Dual Audio Operational Amplifier March 27, 2008 LME49722 Low Noise, High Performance, High Fidelity Dual Audio Operational Amplifier General Description The LME49722 is part of the ultra-low distortion, low noise, high slew rate operational amplifier series optimized and fully specified for high performance, high fidelity applications. Combining advanced leading-edge process technology with state-of-the-art circuit design, the LME49722 audio operational amplifiers deliver superior audio signal amplification for outstanding audio performance. The LME49722 combines extremely low voltage noise density (1.9nV/√Hz) rate with vanishingly low THD+N (0.00002%) to easily satisfy the most demanding audio applications. To ensure that the most challenging loads are driven without compromise, the LME49722 has a high slew rate of ±22V/µs and an output current capability of ±28mA. Further, dynamic range is maximized by an output stage that drives 2kΩ loads to within 1V of either power supply voltage. The LME49722 has a wide supply range of ±2.5V to ±18V. Over this supply range the LME49722 maintains excellent common-mode and power supply rejection, and low input bias current. This Audio Operational Amplifier achieves outstanding AC performance while driving complex loads with values as high as 100pF with gain value greater than 2. Directly interchangeable with LME49720, LM4562 and LME49860 for similar operating voltages. ■ PSRR ■ Slew Rate ■ THD+N (AV = 1, VOUT = 3VRMS, fIN = 1kHz) RL = 2kΩ RL = 600Ω 120dB (typ) ±22V/μs (typ) 0.00002% (typ) 0.00002% (typ) 135dB (typ) 50nA (typ) ±0.02mV (typ) ■ Open Loop Gain (RL = 600Ω) ■ Input Bias Current ■ Voltage Offset Features ■ ■ ■ ■ Easily drives 600Ω loads Optimized for superior audio signal fidelity Output short circuit protection PSRR and CMRR exceed 120dB (typ) Applications ■ Ultra high quality audio amplification ■ High fidelity preamplifiers, phono preamps, and multimedia Key Specifications ■ Wide Operating Voltage Range ■ Equivalent Noise (Frequency = 1kHz) ±2.5V to ±18V 1.9nV/√Hz (typ) 2.8nV/√Hz (typ) ■ High performance professional audio ■ High fidelity equalization and crossover networks with active filters ■ Equivalent Noise (Frequency = 10Hz) ■ High performance line drivers and receivers ■ Low noise industrial applications including test, measurement, and ultrasound Typical Application 30057910 FIGURE 1. Wide Bandwidth Low Noise Low Drift Amplifier © 2008 National Semiconductor Corporation 300579 www.national.com LME49722 Connection Diagram 30057955 Order Number LME49722MA See NS Package Number — M08A www.national.com 2 LME49722 Absolute Maximum Ratings (Notes 1, 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VS = VCC-VEE) 38V Storage Temperature −65°C to 150°C Input Voltage (V-) - 0.7V to (V+) + 0.7V Output Short Circuit (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Continuous 2000V 200V Junction Temperature (TJMAX) Thermal Resistance  θJA  θJC 150°C 154°C/W 27°C/W Operating Ratings Temperature Range TMIN ≤ TA ≤ TMAX Supply Voltage Range ±2.5V ≤ VS ≤ ±18V −40°C ≤ TA ≤ 85°C Electrical Characteristics for the LME49722 Symbol Parameter Conditions AV = 1, VOUT = 3Vrms THD+N Total Harmonic Distortion + Noise RL = 2kΩ RL = 600Ω IMD GBWP SR FPBW Intermodulation Distortion Gain Bandwidth Product Slew Rate Full Power Bandwidth (Notes 1, 2) The following specifications apply for VS = ±15V and ±18V, RL = 2kΩ, fIN = 1kHz unless otherwise specified. Limits apply for TA = 25°C, LME49722 Typical (Note 6) 0.00002 0.00002 0.00002 55 ±22 12 45 ±15 Limit (Note 7) Units (Limits) 0.00009 % % (max) % MHz (min) V/μs (min) MHz AV = 1, VOUT = 3VRMS Two-tone, 60Hz & 7kHz 4:1 fIN = 100kHz AV = 1, VOUT = 10VP-P VOUT = 1VP-P, –3dB referenced to output magnitude at f = 1kHz AV = –1, 10V step, CL = 100pF 0.1% error range fBW = 20Hz to 20kHz f= 1kHz VS = ±15V VS = ±18V f = 10Hz VS = ±15V VS = ±18V f = 1kHz f = 10Hz VCM = 0V ΔVS = 20V (Note 8) fIN = 1kHz fIN = 20kHz VCM = 0V VS = ±15V VS = ±18V –40°C ≤ TA ≤ 85°C VCM = 0V VS = ±15V VS = ±18V ts eINV Settling time Equivalent Input Voltage Noise 1.2 0.25 1.9 1.9 2.8 3.2 2.6 6 ±0.02 120 136 135 50 53 0.1 ±0.7 110 0.35 μs μVRMS (max) nV√Hz eN Equivalent Input Voltage Density 2.5 nV√Hz (max) nV√Hz nV√Hz In VOS PSRR ISOCH-CH Current Noise Density Offset Voltage Power Supply Rejection Ratio Channel-to-Channel Isolation  pA/√Hz  pA/√Hz mV (max) dB (min) dB dB nA nA (max) nA/°C IB ΔIOS/ ΔTemp IOS Input Bias Current Input Bias Current Drift vs Temperature Input Offset Current 200 25 32 100 nA nA (max) 3 www.national.com LME49722 LME49722 Symbol Parameter Conditions Typical (Note 6) Common-Mode Input Voltage Range Common-Mode Rejection Differential Input Impedance Common Mode Input Impedance –10V ≤ VCM ≤ 10V –12V ≤ VOUT ≤ 12V, RL = 600Ω AVOL Open Loop Voltage Gain –12V ≤ VOUT ≤ 12V, RL = 2kΩ –12V ≤ VOUT ≤ 12V, RL = 10kΩ RL = 600Ω RL = 2kΩ VOM Output Voltage Swing RL = 10kΩ VS = ±18V RL = 600Ω RL = 2kΩ RL = 10kΩ IOUT Output Current RL = 600Ω VS = ±15V VS = ±18V Sink to Source fIN = 10kHz Closed-Loop Open-Loop IOUT = 0mA VS = ±15V VS = ±18V +16.6/–16.8 ±17.0 ±17.1 ±23 ±27.6/–28 +43 –40 0.01 13 12.1 12.3 ±15.5 VS = ±15V VS = ±18V –10V ≤ VCM ≤ 10V +14.0 –13.9 +17.0 –16.9 128 30 1000 135 140 140 120 Limit (Note 7) (VCC) – 2.0 (VEE) + 2.0 (VCC) – 2.0 (VEE) + 2.0 110 Units (Limits) V (min) V (min) V (min) V (min) dB (min) kΩ MΩ dB dB dB VIN-CM CMRR ZIN ZCM VS = ±15V +13.7/–14 ±14.0 ±14.1 VPEAK VPEAK VPEAK VPEAK (min) VPEAK VPEAK mA mA (min) mA mA Ω Ω mA mA (max) ±23 IOUT-CC ZOUT Short Circuit Current Output Impedance IS Total Quiescent Power Supply Current 16 Note 1: “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. Note 2: The Electrical Characteristics tables list guaranteed 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 guaranteed. Note 3: 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 inAbsolute Maximum Ratings, whichever is lower. For the LME49722, TJMAX = 150° C and the typical θJC is 27°C/W. Note 4: Human body model, applicable std. JESD22-A114C. Note 5: Machine model, applicable std. JESD22-A115-A. Note 6: Typical values represent most likely parametric norms at TA = +25°C, and at the Recommended Operation Conditions at the time of product characterization and are not guaranteed. Note 7: Datasheet min/max specification limits are guaranteed by test or statistical analysis. Note 8: PSRR is measured as follow: VOS is measured at two supply voltages, ±5V and ±15V. PSRR = | 20log(ΔVOS/ΔVS) |. www.national.com 4 LME49722 Typical Performance Characteristics THD+N vs Output Voltage +VCC = –VEE = 15V, fIN = 1kHz, RL = 2kΩ THD+N vs Output Voltage +VCC = –VEE = 15V, fIN = 1kHz, RL = 600Ω 300579p5 300579p6 THD+N vs Output Voltage +VCC = –VEE = 18V, fIN = 1kHz, RL = 2kΩ THD+N vs Output Voltage +VCC = –VEE = 18V, fIN = 1kHz, RL = 600Ω 300579p7 300579p8 THD+N vs Frequency +VCC = –VEE = 15V, VO = 3VRMS, RL = 2kΩ THD+N vs Frequency +VCC = –VEE = 15V, VO = 3VRMS, RL = 600Ω 300579p1 300579p2 5 www.national.com LME49722 THD+N vs Frequency +VCC = –VEE = 18V, VO = 3VRMS, RL = 2kΩ THD+N vs Frequency +VCC = –VEE = 18V, VO = 3VRMS, RL = 600Ω 300579p3 300579p4 IMD vs Frequency +VCC = –VEE = 15V, RL = 2kΩ IMD vs Frequency +VCC = –VEE = 15V, RL = 600Ω 30057922 30057923 IMD vs Frequency +VCC = –VEE = 18V, RL = 2kΩ IMD vs Frequency +VCC = –VEE = 18V, RL = 600Ω 30057924 30057925 www.national.com 6 LME49722 IMD vs Frequency +VCC = –VEE = 2.5V, RL = 2kΩ IMD vs Frequency +VCC = –VEE = 2.5V, RL = 600Ω 30057920 30057921 Voltage Noise Density vs Frequency +VCC = –VEE = 15V Voltage Noise Density vs Frequency +VCC = –VEE = 18V 300579q0 300579p9 Current Noise Density vs Frequency +VCC = –VEE = 15V Current Noise Density vs Frequency +VCC = –VEE = 18V 30057917 30057918 7 www.national.com LME49722 PSRR+ vs Frequency +VCC = –VEE = 15V, VRIPPLE = 200mVPP, RL = 2kΩ PSRR- vs Frequency +VCC = –VEE = 15V, VRIPPLE = 200mVPP, RL = 2kΩ 30057915 30057926 Crosstalk vs Frequency +VCC = –VEE = 15V, RL = 2kΩ, VOUT = 3VRMS CMRR vs Frequency +VCC = –VEE = 15V, RL = 2kΩ 300579p0 30057916 Output Voltage vs Supply Voltage THD+N = 1%, RL = 2kΩ Output Voltage vs Supply Voltage THD+N = 1%, RL = 600Ω 300579q1 300579q2 www.national.com 8 LME49722 Supply Current vs Supply Voltage RL = 2kΩ Full Power Bandwidth vs Frequency +VCC = –VEE = 15V, RL = 2kΩ 30057911 30057919 Gain Phase vs Frequency +VCC = –VEE = 15V 30057914 9 www.national.com LME49722 Application Information APPLICATION HINTS The LME49722 is a high speed operational amplifier which can operate stably in most of the applications. For the application with gain greater than 2, capacitive loads up to 100pF will cause little change in the phase characteristics of the am- plifiers and are therefore allowable. Capacitive loads greater than 10pF must be isolated from the output, if the gain value is less than 2. The most straightforward way to do this is to put a resistor (its value ≥ 20Ω ) in series with the output. The resistor will also prevent unnecessary power dissipation if the output is accidentally shorted. 30057913 FIGURE 2. Low Impedance Microphone Pre-amplifier 30057912 FIGURE 3. Three-Band Active Tone Control www.national.com 10 LME49722 Revision History Rev 1.0 Date 03/27/08 Description Initial release. 11 www.national.com LME49722 Physical Dimensions inches (millimeters) unless otherwise noted Narrow SOIC Package Order Number LME49722MA NS Package Number M08A www.national.com 12 LME49722 Notes 13 www.national.com LME49722 Low Noise, High Performance, High Fidelity Dual Audio Operational Amplifier Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers Audio Clock Conditioners Data Converters Displays Ethernet Interface LVDS Power Management Switching Regulators LDOs LED Lighting PowerWise Serial Digital Interface (SDI) Temperature Sensors Wireless (PLL/VCO) www.national.com/amplifiers www.national.com/audio www.national.com/timing www.national.com/adc www.national.com/displays www.national.com/ethernet www.national.com/interface www.national.com/lvds www.national.com/power www.national.com/switchers www.national.com/ldo www.national.com/led www.national.com/powerwise www.national.com/sdi www.national.com/tempsensors www.national.com/wireless WEBENCH Analog University App Notes Distributors Green Compliance Packaging Design Support www.national.com/webench www.national.com/AU www.national.com/appnotes www.national.com/contacts www.national.com/quality/green www.national.com/packaging www.national.com/quality www.national.com/refdesigns www.national.com/feedback Quality and Reliability Reference Designs Feedback THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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