OPA4134PA

® OPA 134 OPA 213 4 OPA 413 4 OPA 134 OPA 2134 OPA 413 4 OPA134 OPA2134 OPA4134 High Performance AUDIO OPERATIONAL AMPLIFIERS TM FEATURES q SUPERIOR SOUND QUALITY q ULTRA LOW DISTORTION: 0.00008% q LOW NOISE: 8nV/√Hz q TRUE FET-INPUT: IB = 5pA q HIGH SPEED: SLEW RATE: 20V/µs BANDWIDTH: 8MHz q HIGH OPEN-LOOP GAIN: 120dB (600Ω) q WIDE SUPPLY RANGE: ±2.5V to ±18V q SINGLE, DUAL, AND QUAD VERSIONS DESCRIPTION The OPA134 series are ultra-low distortion, low noise operational amplifiers fully specified for audio applications. A true FET input stage was incorporated to provide superior sound quality and speed for exceptional audio performance. This in combination with high output drive capability and excellent dc performance allows use in a wide variety of demanding applications. In addition, the OPA134’s wide output swing, to within 1V of the rails, allows increased headroom making it ideal for use in any audio circuit. OPA134 op amps are easy to use and free from phase inversion and overload problems often found in common FET-input op amps. They can be operated from ±2.5V to ±18V power supplies. Input cascode circuitry provides excellent common-mode rejection and maintains low input bias current over its wide input voltage range, minimizing distortion. OPA134 series op amps are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions, including high load capacitance. The dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interaction, even when overdriven or overloaded. Single and dual versions are available in 8-pin DIP and SO-8 surface-mount packages in standard configurations. The quad is available in 14-pin DIP and SO-14 surface mount packages. All are specified for –40°C to +85°C operation. A SPICE macromodel is available for design analysis. OPA4134 Out A –In A 1 2 A +In A 3 4 5 B –In B Out B 6 7 14-Pin DIP SO-14 C 9 8 –In C Out C D 12 11 10 +In D V– +In C 14 13 Out D –In D APPLICATIONS q PROFESSIONAL AUDIO AND MUSIC q LINE DRIVERS q LINE RECEIVERS q MULTIMEDIA AUDIO q ACTIVE FILTERS q PREAMPLIFIERS q INTEGRATORS q CROSSOVER NETWORKS OPA134 Offset Trim –In +In V– 1 2 3 4 8-Pin DIP, SO-8 8 7 6 5 Offset Trim V+ OPA2134 Output NC Out A –In A +In A V– 1 2 3 4 8-Pin DIP, SO-8 A B 8 7 6 5 V+ Out B –In B +In B V+ +In B International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111 Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 © 1996 Burr-Brown Corporation PDS-1339C Printed in U.S.A. December, 1997 SPECIFICATIONS At TA = +25°C, VS = ±15V, unless otherwise noted. OPA134PA, UA OPA2134PA, UA OPA4134PA, UA PARAMETER AUDIO PERFORMANCE Total Harmonic Distortion + Noise CONDITION G = 1, f = 1kHz, VO = 3Vrms RL = 2kΩ RL = 600Ω G = 1, f = 1kHz, VO = 1Vp-p THD < 0.01%, RL = 2kΩ, VS = ±18V MIN TYP MAX UNITS Intermodulation Distortion Headroom(1) FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate(2) Full Power Bandwidth Settling Time 0.1% 0.01% Overload Recovery Time NOISE Input Voltage Noise Noise Voltage, f = 20Hz to 20kHz Noise Density, f = 1kHz Current Noise Density, f = 1kHz OFFSET VOLTAGE Input Offset Voltage vs Temperature vs Power Supply (PSRR) Channel Separation (Dual, Quad) INPUT BIAS CURRENT Input Bias Current(4) vs Temperature(3) Input Offset Current(4) INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection INPUT IMPEDANCE Differential Common-Mode OPEN-LOOP GAIN Open-Loop Voltage Gain 0.00008 0.00015 –98 23.6 8 ±20 1.3 0.7 1 0.5 % % dB dBu MHz V/µs MHz µs µs µs ±15 G = 1, 10V Step, CL = 100pF G = 1, 10V Step, CL = 100pF (VIN) • (Gain) = VS 1.2 8 3 ±0.5 ±1 ±2 106 135 130 +5 See Typical Curve ±2 (V–)+2.5 86 ±13 100 90 1013 || 2 1013 || 5 104 104 104 (V–)+0.5 (V–)+1.2 (V–)+2.2 ±35 0.01 10 ±40 See Typical Curve ±15 4 –40 –55 –55 100 150 80 110 120 120 120 (V+)–1.2 (V+)–1.5 (V+)–2.5 ±2 ±3(3) µVrms nV/√Hz fA/√Hz mV mV µV/°C dB dB dB pA nA pA V dB dB Ω || pF Ω || pF dB dB dB V V V mA Ω Ω mA TA = –40°C to +85°C TA = –40°C to +85°C VS = ±2.5V to ±18V dc, RL = 2kΩ f = 20kHz, RL = 2kΩ VCM =0V VCM =0V 90 ±100 ±5 ±50 (V+)–2.5 VCM = –12.5V to +12.5V TA = –40°C to +85°C VCM = –12.5V to +12.5V RL = 10kΩ, VO = –14.5V to +13.8V RL = 2kΩ, VO = –13.8V to +13.5V RL = 600Ω, VO = –12.8V to +12.5V RL = 10kΩ RL = 2kΩ RL = 600Ω f = 10kHz f = 10kHz OUTPUT Voltage Output Output Current Output Impedance, Closed-Loop(5) Open-Loop Short-Circuit Current Capacitive Load Drive (Stable Operation) POWER SUPPLY Specified Operating Voltage Operating Voltage Range Quiescent Current (per amplifier) TEMPERATURE RANGE Specified Range Operating Range Storage Thermal Resistance, θJA 8-Pin DIP SO-8 Surface-Mount 14-Pin DIP SO-14 Surface-Mount ±2.5 IO = 0 ±18 5 +85 +125 +125 V V mA °C °C °C °C/W °C/W °C/W °C/W NOTES: (1) dBu = 20*log (Vrms/0.7746) where Vrms is the maximum output voltage for which THD+Noise is less than 0.01%. See THD+Noise text. (2) Guaranteed by design. (3) Guaranteed by wafer-level test to 95% confidence level. (4) High-speed test at TJ = 25°C. (5) See “Closed-Loop Output Impedance vs Frequency” typical curve. ® OPA134/2134/4134 2 ABSOLUTE MAXIMUM RATINGS(1) Supply Voltage, V+ to V– .................................................................... 36V Input Voltage .................................................... (V–) –0.7V to (V+) +0.7V Output Short-Circuit(2) .............................................................. Continuous Operating Temperature ................................................. –40°C to +125°C Storage Temperature ..................................................... –55°C to +125°C Junction Temperature ...................................................................... 150°C Lead Temperature (soldering, 10s) ................................................. 300°C NOTES: (1) Stresses above these ratings may cause permanent damage. (2) Short-circuit to ground, one amplifier per package. ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD. Burr-Brown recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PACKAGE/ORDERING INFORMATION PACKAGE DRAWING NUMBER(1) TEMPERATURE RANGE –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C PRODUCT Single OPA134PA OPA134UA Dual OPA2134PA OPA2134UA Quad OPA4134PA OPA4134UA PACKAGE 8-Pin Plastic DIP SO-8 Surface-Mount 8-Pin Plastic DIP SO-8 Surface-Mount 14-Pin Plastic DIP SO-14 Surface-Mount 006 182 006 182 010 235 NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. TYPICAL PERFORMANCE CURVES At TA = +25°C, VS = ±15V, R L = 2kΩ, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY 0.1 RL 2kΩ 600Ω SMPTE INTERMODULATION DISTORTION vs OUTPUT AMPLITUDE 5 1 G = +1 f = 1kHz RL = 2kΩ 0.01 THD+Noise (%) IMD (%) 0.1 OPA134 OP176 0.010 OPA134 Baseline 0.001 G = +10 0.0001 G = +1 VO = 3Vrms 0.00001 10 100 1k Frequency (Hz) 10k 100k 0.001 0.0005 30m 0.1 1 Output Amplitude (Vpp) 10 30 The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. ® 3 OPA134/2134/4134 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = ±15V, R L = 2kΩ, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY 0.01 VO = 10Vrms RL = 2kΩ THD+Noise (%) THD+Noise (%) HEADROOM – TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT AMPLITUDE 1 VS = ±18V RL = 2kΩ f = 1kHz 0.1 THD < 0.01% OPA134 – 11.7Vrms OP176 – 11.1Vrms 0.001 VS = ±16 0.0001 0.010 OPA134 OP176 OPA134 VS = ±17 0.00001 20 100 VS = ±18 1k Frequency (Hz) 10k 20k 0.001 0.0005 Baseline 0.1 1 Output Amplitude (Vrms) 10 20 HARMONIC DISTORTION + NOISE vs FREQUENCY 0.01 2nd Harmonic 3rd Harmonic Voltage Noise (nV/√Hz) VOLTAGE NOISE vs SOURCE RESISTANCE 1k OP176+ Resistor Amplitude (% of Fundamentals) 0.001 100 0.0001 RL =6 00Ω 10 0.00001 RL kΩ =2 OPA134+ Resistor 1 Resistor Noise Only Vn (total) = √(inRS)2 + en2 + 4kTRS 10k 100k 1M 10M VO = 1Vrms 0.000001 20 100 1k Frequency (Hz) 10k 20k 0.1 10 100 1k Source Resistance (Ω) INPUT VOLTAGE AND CURRENT NOISE SPECTRAL DENSITY vs FREQUENCY 1k INPUT-REFERRED NOISE VOLTAGE vs NOISE BANDWIDTH 100 RS = 20Ω Voltage Noise (nV/√Hz) Current Noise (fA/√Hz) Noise Voltage (µV) 100 Voltage Noise 10 10 Peak-to-Peak 1 RMS Current Noise 1 1 10 100 1k Frequency (Hz) 10k 100k 1M 0.1 1 10 100 1k 10k 100k Noise Bandwidth (Hz) ® OPA134/2134/4134 4 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = ±15V, RL = 2kΩ, unless otherwise noted. OPEN-LOOP GAIN/PHASE vs FREQUENCY 160 140 0 CLOSED-LOOP GAIN vs FREQUENCY 50 40 Closed-Loop Gain (dB) –45 Phase Shift (°) 120 Voltage Gain (dB) G = +100 30 20 G = +10 10 0 G = +1 –10 –20 100 80 60 40 20 0 –20 0.1 1 10 100 1k 10k 100k 1M G φ –90 –135 –180 10M 1k 10k 100k Frequency (Hz) 1M 10M Frequency (Hz) POWER SUPPLY AND COMMON-MODE REJECTION vs FREQUENCY 120 100 PSR, CMR (dB) CHANNEL SEPARATION vs FREQUENCY 160 RL = ∞ –PSR Channel Separation (dB) 140 80 60 40 20 0 10 100 1k 10k 100k 1M Frequency (Hz) +PSR CMR 120 100 Dual and quad devices. G = 1, all channels. Quad measured channel A to D or B to C—other combinations yield improved rejection. 100 1k Frequency (Hz) RL = 2kΩ 80 10k 100k MAXIMUM OUTPUT VOLTAGE vs FREQUENCY 30 VS = ±15V CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY 10 Closed-Loop Output Impedance (Ω) Maximum output voltage without slew-rate induced distortion Output Voltage (Vp-p) 1 Note: Open-Loop Output Impedance at f = 10kHz is 10Ω 20 0.1 G = +100 G = +10 0.001 G = +2 G = +1 0.0001 10 100 1k Frequency (Hz) 10k 100k 10 VS = ±5V VS = ±2.5V 10k 100k Frequency (Hz) 1M 10M 0.01 0 ® 5 OPA134/2134/4134 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = ±15V, R L = 2kΩ, unless otherwise noted. INPUT BIAS CURRENT vs TEMPERATURE 100k 10k High Speed Test Warmed Up 10 9 INPUT BIAS CURRENT vs INPUT COMMON-MODE VOLTAGE High Speed Test Input Bias Current (pA) Input Bias Current (pA) –25 0 25 50 75 100 125 8 7 6 5 4 3 2 1 0 –15 –10 –5 0 5 10 15 1k 100 Dual 10 1 0.1 –75 –50 Ambient Temperature (°C) Single Common-Mode Voltage (V) OPEN-LOOP GAIN vs TEMPERATURE 150 RL = 600Ω 140 Open-Loop Gain (dB) CMR, PSR vs TEMPERATURE 120 RL = 2kΩ CMR, PSR (dB) 110 PSR 130 120 RL = 10kΩ 110 FPO –75 –50 –25 0 25 50 75 100 125 100 CMR 90 –75 –50 –25 0 25 50 75 100 125 100 Temperature (°C) Ambient Temperature (°C) QUIESCENT CURRENT AND SHORT-CIRCUIT CURRENT vs TEMPERATURE 4.3 60 OUTPUT VOLTAGE SWING vs OUTPUT CURRENT 15 14 VIN = 15V –55°C 25°C 25°C 125°C 85°C 125°C 85°C 13 12 11 10 –10 –11 –12 –13 –14 –15 0 VIN = –15V 10 20 30 40 50 60 25°C –55°C Quiescent Current Per Amp (mA) 4.1 ±ISC ±IQ 40 4.0 30 3.9 20 3.8 –75 –50 –25 0 25 50 75 100 125 Ambient Temperature (°C) 10 Output Voltage Swing (V) Short-Circuit Current (mA) 4.2 50 Output Current (mA) ® OPA134/2134/4134 6 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = ±15V, RL = 2kΩ, unless otherwise noted. OFFSET VOLTAGE PRODUCTION DISTRIBUTION 18 16 Typical production distribution of packaged units. 12 10 OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION Typical production distribution of packaged units. Percent of Amplifiers (%) Percent of Amplifiers (%) 14 12 10 8 6 4 2 0 8 6 4 2 0 –2000 –1800 –1600 –1400 –1200 –1000 –800 –600 –400 –200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 Offset Voltage (V) Offset Voltage Drift (µV/°C) SMALL-SIGNAL STEP RESPONSE G =1, CL = 100pF LARGE-SIGNAL STEP RESPONSE G = 1, CL = 100pF 50mV/div 5V/div 200ns/div 1µs/div SETTLING TIME vs CLOSED-LOOP GAIN 100 SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE 60 50 G = +1 G = –1 Settling Time (µs) Overshoot (%) 10 0.01% 40 30 20 10 0.1% 1 G = ±10 0.1 ±1 ±10 ±100 ±1000 Closed-Loop Gain (V/V) 0 100pF 1nF Load Capacitance 12.5 10nF ® 7 OPA134/2134/4134 APPLICATIONS INFORMATION OPA134 series op amps are unity-gain stable and suitable for a wide range of audio and general-purpose applications. All circuitry is completely independent in the dual version, assuring normal behavior when one amplifier in a package is overdriven or short-circuited. Power supply pins should be bypassed with 10nF ceramic capacitors or larger to minimize power supply noise. OPERATING VOLTAGE OPA134 series op amps operate with power supplies from ±2.5V to ±18V with excellent performance. Although specifications are production tested with ±15V supplies, most behavior remains unchanged throughout the full operating voltage range. Parameters which vary significantly with operating voltage are shown in the typical performance curves. OFFSET VOLTAGE TRIM Offset voltage of OPA134 series amplifiers is laser trimmed and usually requires no user adjustment. The OPA134 (single op amp version) provides offset trim connections on pins 1 and 8, identical to 5534 amplifiers. Offset voltage can be adjusted by connecting a potentiometer as shown in Figure 1. This adjustment should be used only to null the offset of the op amp, not to adjust system offset or offset produced by the signal source. Nulling offset could change the offset voltage drift behavior of the op amp. While it is not possible to predict the exact change in drift, the effect is usually small. TOTAL HARMONIC DISTORTION OPA134 series op amps have excellent distortion characteristics. THD+Noise is below 0.0004% throughout the audio frequency range, 20Hz to 20kHz, with a 2kΩ load. In addition, distortion remains relatively flat through its wide output voltage swing range, providing increased headroom compared to other audio amplifiers, including the OP176/275. 10nF V+ Trim Range: ±4mV typ 100kΩ 7 2 3 10nF 1 8 OPA134 4 6 OPA134 single op amp only. Use offset adjust pins only to null offset voltage of op amp—see text. V– FIGURE 1. OPA134 Offset Voltage Trim Circuit. In many ways headroom is a subjective measurement. It can be thought of as the maximum output amplitude allowed while still maintaining a very low level of distortion. In an attempt to quantify headroom, we have defined “very low distortion” as 0.01%. Headroom is expressed as a ratio which compares the maximum allowable output voltage level to a standard output level (1mW into 600Ω, or 0.7746Vrms). Therefore, OPA134 series op amps, which have a maximum allowable output voltage level of 11.7Vrms (THD+Noise < 0.01%), have a headroom specification of 23.6dBu. See the typical curve “Headroom - Total Harmonic Distortion + Noise vs Output Amplitude.” DISTORTION MEASUREMENTS The distortion produced by OPA134 series op amps is below the measurement limit of all known commercially available equipment. However, a special test circuit can be used to extend the measurement capabilities. Op amp distortion can be considered an internal error source which can be referred to the input. Figure 2 shows a circuit which causes the op amp distortion to be 101 times greater than normally produced by the op amp. The addition of R3 to the otherwise standard non-inverting amplifier R1 R2 SIG. DIST. GAIN GAIN 1 R3 OPA134 VO = 3Vrms 11 101 101 101 101 R1 ∞ 100Ω 10Ω R2 1kΩ 1kΩ 1kΩ R3 10Ω 11Ω ∞ Signal Gain = 1+ R2 R1 R2 R1 II R3 Distortion Gain = 1+ Generator Output Analyzer Input Audio Precision System One Analyzer(1) RL 1kΩ IBM PC or Compatible NOTE: (1) Measurement BW = 80kHz FIGURE 2. Distortion Test Circuit. ® OPA134/2134/4134 8 configuration alters the feedback factor or noise gain of the circuit. The closed-loop gain is unchanged, but the feedback available for error correction is reduced by a factor of 101, thus extending the resolution by 101. Note that the input signal and load applied to the op amp are the same as with conventional feedback without R3. The value of R3 should be kept small to minimize its effect on the distortion measurements. Validity of this technique can be verified by duplicating measurements at high gain and/or high frequency where the distortion is within the measurement capability of the test equipment. Measurements for this data sheet were made with an Audio Precision distortion/noise analyzer which greatly simplifies such repetitive measurements. The measurement technique can, however, be performed with manual distortion measurement instruments. SOURCE IMPEDANCE AND DISTORTION For lowest distortion with a source or feedback network which has an impedance greater than 2kΩ, the impedance seen by the positive and negative inputs in noninverting applications should be matched. The p-channel JFETs in the FET input stage exhibit a varying input capacitance with applied common-mode input voltage. In inverting configurations the input does not vary with input voltage since the inverting input is held at virtual ground. However, in noninverting applications the inputs do vary, and the gateto-source voltage is not constant. The effect is increased distortion due to the varying capacitance for unmatched source impedances greater than 2kΩ. To maintain low distortion, match unbalanced source impedance with appropriate values in the feedback network as shown in Figure 3. Of course, the unbalanced impedance may be from gain-setting resistors in the feedback path. If the parallel combination of R1 and R2 is greater than 2kΩ, a matching impedance on the noninverting input should be used. As always, resistor values should be minimized to reduce the effects of thermal noise. NOISE PERFORMANCE Circuit noise is determined by the thermal noise of external resistors and op amp noise. Op amp noise is described by two parameters—noise voltage and noise current. The total noise is quantified by the equation: Vn (total) = (i n R S )2 + e n 2 + 4 kTR s With low source impedance, the current noise term is insignificant and voltage noise dominates the noise performance. At high source impedance, the current noise term becomes the dominant contributor. Low noise bipolar op amps such as the OPA27 and OPA37 provide very low voltage noise at the expense of a higher current noise. However, OPA134 series op amps are unique in providing very low voltage noise and very low current noise. This provides optimum noise performance over a wide range of sources, including reactive source impedances, refer to the typical curve, “Voltage Noise vs Source Resistance.” Above 2kΩ source resistance, the op amp contributes little additional noise—the voltage and current terms in the total noise equation become insignificant and the source resistance term dominates. Below 2kΩ, op amp voltage noise dominates over the resistor noise, but compares favorably with other audio op amps such as OP176. PHASE REVERSAL PROTECTION OPA134 series op amps are free from output phase-reversal problems. Many audio op amps, such as OP176, exhibit phase-reversal of the output when the input common-mode voltage range is exceeded. This can occur in voltage-follower circuits, causing serious problems in control loop applications. OPA134 series op amps are free from this undesirable behavior even with inputs of 10V beyond the input common-mode range. POWER DISSIPATION OPA134 series op amps are capable of driving 600Ω loads with power supply voltage up to ±18V. Internal power dissipation is increased when operating at high supply voltages. Copper leadframe construction used in OPA134 series op amps improves heat dissipation compared to conventional materials. Circuit board layout can also help minimize junction temperature rise. Wide copper traces help dissipate the heat by acting as an additional heat sink. Temperature rise can be further minimized by soldering the devices to the circuit board rather than using a socket. OUTPUT CURRENT LIMIT Output current is limited by internal circuitry to approximately ±40mA at 25°C. The limit current decreases with increasing temperature as shown in the typical performance curve “Short-Circuit Current vs Temperature.” R1 R2 OPA134 VIN If RS > 2kΩ or R1 II R2 > 2kΩ RS = R1 II R2 VOUT FIGURE 3. Impedance Matching for Maintaining Low Distortion in Non-Inverting Circuits. ® 9 OPA134/2134/4134