OPA137 OPA2137 OPA4137 ® OPA 413 7 OPA 137 OPA 413 7 OPA 213 7 LOW COST FET-INPUT OPERATIONAL AMPLIFIERS MicroAmplifier ™ Series FEATURES DESCRIPTION ● ● ● ● ● ● ● ● OPA137 series FET-input operational amplifiers are designed for low cost and miniature applications. In addition to small size (SOT-23-5 and MSOP-8 packages), they provide low input bias current (5pA), low quiescent currrent (220µA/ channel), and high open-loop gain (94dB). Either single (+4.5V to +36V) or dual (±2.25 to ±18V) supplies can be used. The input common-mode voltage range includes the positive supply—suitable for many single-supply applications. Single, dual, and quad versions have identical specifications for maximum design flexibility. OPA137 op amps are easy to use and free from phase inversion and overload problems found in some FET-input amplifiers. High performance, including linearity, is maintained as the amplifiers swing to their specified limits. In addition, the combination of high slew rate (3.5V/µs) and wide bandwidth (1MHz) provide fast settling time assuring good dynamic response. Dual and quad designs feature completely independent circuitry for lowest crosstalk and freedom from interaction. The single (OPA137) packages are the tiny 5-lead SOT-23-5 surface mount, SO-8 surface mount, and 8-pin DIP. The dual (OPA2137) comes in the miniature MSOP-8 surface mount, SO-8 surface mount, and 8-pin DIP packages. The quad (OPA4137) packages are the SO-14 surface mount and the 14-pin DIP. All are specified from –40°C to +85°C and operate from –55°C to +125°C. A SPICE macromodel is available for design analysis. FET INPUT: IB = 5pA LOW OFFSET VOLTAGE: 1.5mV WIDE SUPPLY RANGE: ±2.25V to ±18V LOW QUIESCENT CURRENT: 220µA/channel EXCELLENT SPEED/POWER: 1MHz INPUT TO POSITIVE SUPPLY MicroSIZE PACKAGES: SOT-23-5, MSOP-8 SINGLE, DUAL, AND QUAD APPLICATIONS ● STRAIN GAGE AMPLIFIER ● PHOTODETECTOR AMPLIFIER ● PRECISION INTEGRATOR ● BATTERY-POWERED INSTRUMENTS ● TEST EQUIPMENT ● ACTIVE FILTERS OPA137 NC 1 8 NC –In 2 7 V+ +In 3 6 Output V– 4 5 NC OPA4137 OPA2137 Out A 1 14 Out D –In A 2 13 –In D +In A 3 12 +In D V+ 4 11 V– +In B 5 10 +In C A OPA137 8-Pin DIP, SO-8 Out 1 5 V+ V– 2 +In 3 4 –In SOT-23-5 Out A 1 –In A 2 +In A 3 V– 4 A B 8 V+ 7 Out B 6 –In B 5 +In B 8-Pin DIP, SO-8, MSOP-8 D B C –In B 6 9 –In C Out B 7 8 Out C 14-Pin DIP SO-14 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 © 1998 Burr-Brown Corporation PDS-1438A Printed in U.S.A. August, 1998 SPECIFICATIONS: VS = ±15V At TA = +25°C, RL = 10kΩ connected to ground, unless otherwise noted. Boldface limits apply over the specified temperature range, TA = –40°C to +85°C. OPA137N, U, P OPA2137E, U, P OPA4137U, P PARAMETER CONDITION OFFSET VOLTAGE Input Offset Voltage TA = –40°C to +85°C vs Temperature vs Power Supply TA = –40°C to +85°C Channel Separation (dual, quad) dVOS/dT PSRR TA = –40°C to +85°C VS = ±3V to ±18V dc 0.6 VCM = 0V IOS FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate Settling Time, 0.1% 0.01% Overload Recovery Time Total Harmonic Distortion + Noise OUTPUT Voltage Output TA = –40°C to +85°C Short-Circuit Current Capacitive Load Drive POWER SUPPLY Specified Operating Range Operating Voltage Range Dual Supplies Single Supply Quiescent Current TA = –40°C to +85°C TEMPERATURE RANGE Specified Range Operating Range Storage Range Thermal Resistance SOT-23-5 Surface Mount MSOP-8 Surface Mount SO-8 Surface Mount 8-Pin DIP SO-14 Surface Mount 14-Pin DIP ±3 (V–) + 3 TYP ±2.5 ±3.5 ✻ ✻ ±7 ±250 ±250 MAX UNITS ±10 mV mV µV/°C µV/V µV/V µV/V ±15 ✻ ✻ ✻ ✻ ✻ ✻ ✻ pA ✻ pA µVp-p nV/√Hz fA/√Hz ✻ ✻ ✻ (V+) ✻ ✻ V VCM = –12V to 15V 76 74 84 84 70 70 ✻ ✻ dB dB VCM = –12V to 15V 72 70 INPUT IMPEDANCE Differential Common-Mode OPEN-LOOP GAIN Open-Loop Voltage Gain TA = –40°C to +85°C MIN 2 45 1.2 en in VCM CMRR MAX ±5 ±100 See Typical Curve ±2 ±50 IB NOISE Input Voltage Noise, f = 0.1 to 10Hz Input Voltage Noise Density, f = 1kHz Current Noise Density, f = 1kHz TYP ±1.5 ±2.5 ±15 ±90 VOS INPUT BIAS CURRENT Input Bias Current vs Temperature Input Offset Current INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection Ratio OPA137, OPA2137 OPA4137 TA = –40°C to +85°C OPA137, OPA2137 OPA4137 MIN OPA137NA, UA, PA OPA2137EA, UA, PA OPA4137UA, PA 70 70 1010 || 1 1012 || 2 AOL GBW SR THD+N VO = –13.8V to 13.9V VO = –13.8V to 13.9V 86 86 1 3.5 8 10 1 0.05 G=1 G = 1, 10V Step, CL = 100pF G = 1, 10V Step, CL = 100pF VIN • G = VS G = 1, f = 1kHz, 3.5Vrms VOUT (V–) + 1.2 (V–) + 1.2 ISC CLOAD VS (V+) – 1.1 (V+) – 1.1 Ω || pF Ω || pF ✻ dB dB ✻ ✻ ✻ ✻ ✻ ✻ MHz V/µs µs µs µs % ✻ ✻ ✻ ✻ –25/+60 1000 ✻ ✻ ±15 ✻ V ±220 IO = 0 IO = 0 ✻ ✻ V V mA pF ±2.25(1) +4.5 IQ ✻ ✻ 94 dB dB –40 –55 –55 ±18 +36 ±270 ±375 ✻ ✻ +85 +125 +125 ✻ ✻ ✻ ✻ θJA 200 150 150 100 100 80 ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ V V µA µA ✻ ✻ ✻ °C °C °C °C/W °C/W °C/W °C/W °C/W °C/W ✻ Specifications the same as OPA137N, U, P. NOTE: (1) At minimum power supply voltage inputs must be biased above ground in accordance with common-mode voltage range restrictions—see “Operating Voltage” discussion. ® OPA137, 2137, 4137 2 ABSOLUTE MAXIMUM RATINGS(1) ELECTROSTATIC DISCHARGE SENSITIVITY Supply Voltage, V+ to V– ..................................................................... 36V Input Voltage ....................................................... (V–) –0.7V to (V+) +0.7V Input Current ....................................................................................... 2mA Output Short-Circuit(2) .............................................................. Continuous Operating Temperature .................................................. –55°C to +125°C Storage Temperature ...................................................... –55°C to +125°C Junction Temperature .................................................................... +150°C Lead Temperature (soldering, 10s) ................................................. 300°C 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. NOTE: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum ratings for extended periods may affact device reliability. (2) Short circuit to ground, one amplifier per package. PACKAGE/ORDERING INFORMATION PRODUCT PACKAGE PACKAGE DRAWING NUMBER(1) SPECIFIED TEMPERATURE RANGE PACKAGE MARKING ORDERING NUMBER(2) TRANSPORT MEDIA Single OPA137N 5-Lead SOT-23-5 Surface Mount 331 –40°C to +85°C E37(3) " " " " " –40°C to +85°C E37(3) OPA137N/250 OPA137N/3K OPA137NA/250 OPA137NA/3K OPA137U OPA137U/2K5 OPA137UA OPA137UA/2K5 OPA137P OPA137PA Tape and Reel Tape and Reel Tape and Reel Tape and Reel Rails Tape and Reel Rails Tape and Reel Rails Rails OPA2137E/250 OPA2137E/2K5 OPA2137EA/250 OPA2137EA/2K5 OPA2137U OPA2137U/2K5 OPA2137UA OPA2137UA/2K5 OPA2137P OPA2137PA Tape and Reel Tape and Reel Tape and Reel Tape and Reel Rails Tape and Reel Rails Tape and Reel Rails Rails OPA4137U OPA4137U/2K5 OPA4137UA OPA4137UA/2K5 OPA4137P OPA4137PA Rails Tape and Reel Rails Tape and Reel Rails Rails OPA137NA 5-Lead SOT-23-5 Surface Mount 331 " " " " " OPA137U SO-8 Surface Mount 182 –40°C to +85°C OPA137U " " " " " OPA137UA SO-8 Surface Mount 182 –40°C to +85°C OPA137UA " " " " " OPA137P OPA137PA 8-Pin DIP 8-Pin DIP 006 006 –40°C to +85°C –40°C to +85°C OPA137P OPA137PA Dual OPA2137E MSOP-8 Surface Mount 337 –40°C to +85°C E37(3) " " " " " E37(3) OPA2137EA MSOP-8 Surface Mount 337 –40°C to +85°C " " " " " OPA2137U SO-8 Surface Mount 182 –40°C to +85°C OPA2137U " OPA2137UA " " " " " SO-8 Surface Mount 182 –40°C to +85°C OPA2137UA " " " " 8-Pin DIP 8-Pin DIP 006 006 –40°C to +85°C –40°C to +85°C OPA2137P OPA2137PA Quad OPA4137U SO-14 Surface Mount 235 –40°C to +85°C OPA4137U " " " " " SO-14 Surface Mount 235 –40°C to +85°C OPA4137UA " " " " 14-Pin DIP 14-Pin DIP 010 010 –40°C to +85°C –40°C to +85°C OPA4137P OPA4137PA OPA2137P OPA2137PA OPA4137UA " OPA4137P OPA4137PA NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 3000 pieces of “OPA137NA/3K” will get a single 3000-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book. (3) Grade information is marked on the reel. 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 OPA137, 2137, 4137 TYPICAL PERFORMANCE CURVES At TA = +25°C, VS = ±15V, RL = 10kΩ, connected to ground, unless otherwise noted. POWER SUPPLY AND COMMON-MODE REJECTION vs FREQUENCY OPEN-LOOP GAIN/PHASE vs FREQUENCY 100 100 80 0 –45 –40°C φ 40 –90 20 –135 +85°C 0 PSRR, CMRR (dB) Gain (dB) 60 80 Phase Shift (°) G CMRR 60 40 –PSRR 20 –180 +25°C +PSRR –20 0 1 10 100 1k 10k 100k 1M 10 10M 100 1k Frequency (Hz) 10k 100k 1M Frequency (Hz) INPUT VOLTAGE AND CURRENT NOISE SPECTRAL DENSITY vs FREQUENCY CHANNEL SEPARATION vs FREQUENCY 1k 1 140 10 10 1 Current Noise 1 Channel Separation (dB) Voltage Noise 100 Current Noise (fA/√Hz) Voltage Noise (nV/√Hz) 120 0.1 0.1 1 10 100 1k 10k 100k 80 60 40 Dual and quad devices. G = 1, all channels. Quad measured channel A to D or B to C—other combinations yield improved rejection. 20 1M 100 1k 10k 100k 1M Frequency (Hz) Frequency (Hz) INPUT BIAS CURRENT vs TEMPERATURE INPUT BIAS CURRENT vs INPUT COMMON-MODE VOLTAGE 1n 10k Input Bias Current (pA) 1k Input Bias Current (pA) 100 100 10 1 0.1 Input bias current is a function of the voltage between the V– supply and the inputs. 100p 10p 1p –75 –50 –25 0 25 50 75 100 125 –15 ® OPA137, 2137, 4137 –10 –5 0 5 Common-Mode Voltage (V) Temperature (°C) 4 10 15 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = ±15V, RL = 10kΩ, connected to ground, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY AOL, CMRR, PSRR vs TEMPERATURE 1 95 AOL, CMRR, PSRR (dB) VO = –13.8V to +13.9V 0.1 G=1 0.01 PSRR 75 65 100 1k 10k 100k –75 –50 –25 75 100 125 QUIESCENT CURRENT and SHORT-CIRCUIT CURRENT vs SUPPLY VOLTAGE (IQ Per Amplifier) ±80 ±40 ±150 ±30 ±20 –ISC ±50 0 –75 –50 –25 0 25 50 75 100 ±60 ±220 Quiescent Current (µA) ±50 IQ ±100 (IQ Per Amplifier) Short-Circuit Current (mA) +ISC ±70 ±230 ±70 ±60 ±200 ±210 ±40 ±190 ±30 –ISC ±180 ±170 0 ±160 0 ±5 ±15 ±20 OUTPUT VOLTAGE SWING vs OUTPUT CURRENT (V+) –55°C (V+) –1 Output Voltage Swing (V) CL = 200pF ±10 Supply Voltage (V) CL = 100pF 20 ±20 ±10 0 125 Maximum output voltage without visible dynamic distortion. 25 ±50 ±200 ±10 MAXIMUM OUTPUT VOLTAGE vs FREQUENCY VS = ±15V ±ISC IQ Temperature (°C) Output Voltage (Vp-p) 50 QUIESCENT CURRENT and SHORT-CIRCUIT CURRENT vs TEMPERATURE ±250 15 25 Temperature (°C) ±300 30 0 Frequency (Hz) ±350 Quiescent Current (µA) 80 70 VO = 3.5Vrms ±400 CMRR 85 Short-Circuit Current (mA) THD+N (%) G = 10 AOL 90 Without slew-rate induced distortion 10 5 (V+) –2 +125°C +25°C (V+) –3 (V–) +3 +25°C +125°C (V–) +2 (V–) +1 VS = ±5V 0 –55°C (V–) 10k 100k 0 1M ±2 ±4 ±6 ±8 ±10 Output Current (mA) Frequency (Hz) ® 5 OPA137, 2137, 4137 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = ±15V, RL = 10kΩ, connected to ground, unless otherwise noted. 20 20 Typical production distribution of packaged units. Single, duals, and quads included. 16 14 Typical production distribution of packaged units. Single, duals, and quads included. 18 Percent of Amplifiers (%) 18 12 10 8 6 4 16 14 12 10 8 6 4 2 0 0 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 82 76 80 2 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10 Percent of Amplifiers (%) OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION OFFSET VOLTAGE PRODUCTION DISTRIBUTION Offset Voltage (mV) Offset Voltage Drift (µV/°C) SETTLING TIME vs CLOSED-LOOP GAIN SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE 60 100 10V Step 50 Overshoot (%) 10 0.1% 40 G = –1 30 20 10 G = +10 G = +1 0 1 1 10 10 100 100 SMALL-SIGNAL STEP RESPONSE G = 1, CL = 50pF LARGE-SIGNAL STEP RESPONSE G = 1, CL = 50pF 5V/div 1µs/div 5µs/div ® OPA137, 2137, 4137 1k Load Capacitance (pF) Closed-Loop Gain (V/V) 20mV/div Settling Time (µs) 0.01% 6 10k APPLICATIONS INFORMATION HIGH-SIDE CURRENT SENSING Many applications require the sensing of signals near the positive supply. The common-mode input range of OPA137 op amps includes the positive rail, enabling them to be used to sense power supply currents as shown in Figure 2. OPA137 series op amps are unity-gain stable and suitable for a wide range of general-purpose applications. Power supply pins should be bypassed with 10nF ceramic capacitors or larger. All circuitry is completely independent in dual and quad versions, assuring normal performance when one amplifier in a package is overdriven or short circuited. Many key parameters are guaranteed over the specified temperature range, –40°C to +85°C. R1 0.1Ω V+ R2 1kΩ Load OPERATING VOLTAGE OPA137 op amps can be operated on power supplies as low as ±2.25V. Performance remains excellent with power supplies ranging from ±2.25V to ±18V (+4.5V to +36V single supply). Most parameters vary only slightly throughout this supply voltage range. Quiescent current and short-circuit current vs supply voltage are shown in Typical Performance Curves. OPA137 20pF VO = R1 R3 I R2 L Zetex Darlington ZTX712 Operation at very low supply voltage (VS ≤ ±3V) requires careful attention to ensure that the common-mode voltage remains within the linear range, VCM = (V–)+3V to (V+). Inputs may need to be biased above ground in accordance with the common-mode voltage range restrictions for linear operation. VO OPA241 Ground-referred output R3 10kΩ FIGURE 2. High-Side Current Monitor. INPUT VOLTAGE The input common-mode voltage range of OPA137 series op amps extends from (V–)+3V to the positive rail, V+. For normal operation, inputs should be limited to this range. The inputs may go beyond the power supplies without output phase-reversal. Many FET-input op amps (such as TL061 types) exhibit phase-reversal of the output when the input common-mode range is exceeded. This can occur in voltagefollower circuits, causing serious problems in control loop applications. INPUT BIAS CURRENT The input bias current is approximately 5pA at room temperature and increases with temperature as shown in the typical performance curve “Input Bias Current vs Temperature.” Input Bias current also varies with common-mode voltage and power supply voltage. This variation is dependent on the voltage between the negative power supply and the common-mode input voltage. The effect is shown in the typical performance curve “Input Bias Current vs CommonMode Voltage.” Input terminals are diode-clamped to the power supply rails for ESD protection. If the input voltage can exceed the negative supply by 500mV, input current should be limited to 2mA (or less). If the input current is not adequately limited, you may see unpredicatable behavior in the other amplifiers in the package. This is easily accomplished with an input resistor as shown in Figure 1. Many input signals are inherently current-limited, therefore, a limiting resistor may not be required. RF 1MΩ 3.3pF V+ IOVERLOAD 2mA max OPA137 λ Photodiode BPW34 CD = 75pF VOUT VIN Inputs are internally clamped to V+ and V– ID OPA137 VO = – R F I D ID is proportional to light intensity (radiant power) V– FIGURE 3. Photodetector Amplifier. FIGURE 1. Input Current Protection for Voltages Exceeding the Supply Voltage. ® 7 OPA137, 2137, 4137 SOT-23-5 (Package Drawing #331) MSOP-8 (Package Drawing #337) 0.19 (4.83) 0.04 (1.016) 0.035 (0.889) 0.10 (2.54) 0.075 (1.905) 0.027 (0.686) 0.0375 (0.9525) 0.0375 (0.9525) 0.016 (0.41) Refer to end of data sheet or Appendix C of Burr-Brown Data Book for tolerances and detailed package drawing. For further information on solder pads for surface-mount devices consult Application Bulletin AB-132. FIGURE 4. Recommended SOT-23-5 and MSOP-8 Solder Footprints. ® OPA137, 2137, 4137 8 0.0256 (0.65)