a Precision, Low Power, Micropower Dual Operational Amplifier OP290 FEATURES Single-/Dual-Supply Operation, 1.6 V to 36 V, 0.8 V to 18 V True Single-Supply Operation; Input and Output Voltage Ranges Include Ground Low Supply Current (Per Amplifier), 20 A Max High Output Drive, 5 mA Min Low Input Offset Voltage, 200 V Max High Open-Loop Gain, 700 V/mV Min Outstanding PSRR, 5.6 V/V Max Industry Standard 8-Lead Dual Pinout Available in Die Form PIN CONNECTIONS 16-Lead SOL (S-Suffix) -IN A 1 16 +IN A 2 15 NC +IN A 14 NC NC 3 OP290 13 V+ TOP VIEW NC 5 (Not to Scale) 12 NC V- 4 GENERAL DESCRIPTION +IN B 6 11 NC The OP290 is a high performance micropower dual op amp that operates from a single supply of 1.6 V to 36 V or from dual supplies of 0.8 V to 18 V. Input voltage range includes the negative rail allowing the OP290 to accommodate input signals down to ground in single-supply operation. The OP290's output swing also includes ground when operating from a single supply, enabling "zero-in, zero-out" operation. -IN B 7 10 OUT B The OP290 draws less than 20 A of quiescent supply current per amplifier, while able to deliver over 5 mA of output current to a load. Input offset voltage is below 200 V eliminating the need for external nulling. Gain exceeds 700,000 and common-mode rejection is better than 100 dB. The power supply rejection ratio of under 5.6 pV/V minimizes offset voltage changes experienced in battery-powered systems. The low offset voltage and high gain offered by the OP290 bring precision performance to micropower applications. The minimal voltage and current requirements of the OP290 suit it for battery- and solar-powered applications, such as portable instruments, remote sensors, and satellites. For a single op amp, see the OP90; for a quad, see the OP490. NC 8 NC 9 NC = NO CONNECT EPOXY MINI-DIP (P-Suffix) 8-Lead HERMETIC DIP (Z-Suffix) OUT A 1 -IN A 2 +IN A 3 V- 4 A B OP290 8 V+ 7 OUT B 6 -IN B 5 +IN B V+ +IN OUTPUT -IN NULL NULL V ELECTRONICALLY ADJUSTED ON CHIP FOR MINIMUM OFFSET VOLTAGE Figure 1. Simplified Schematic (one of two amplifiers is shown) REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 (c) Analog Devices, Inc., 2002 OP290-SPECIFICATIONS ELECTRICAL CHARACTERISTICS (@ VS = 1.5 V to 15 V, TA = 25C, unless otherwise noted.) OP290E Parameter Symbol Conditions Min INPUT OFFSET VOLTAGE VOS OP290F OP290G Typ Max Min Typ Max Min Typ Max Unit 50 200 75 300 125 500 V INPUT OFFSET CURRENT IOS VCM = 0 V 0.1 3 0.1 5 0.1 5 nA INPUT BIAS CURRENT IB VCM = 0 V 4.0 15 4.0 20 4.0 25 nA LARGE-SIGNAL VOLTAGE GAIN AVO INPUT VOLTAGE RANGE1 IVR OUTPUT VOLTAGE SWING VO VOH VOL COMMON-MODE REJECTION CMR POWER SUPPLY REJECTION RATIO PSRR SUPPLY CURRENT (All Amplifiers) ISY CAPACITIVE LOAD STABILITY INPUT NOISE VOLTAGE1 enp-p INPUT RESISTANCE DIFFERENTIAL-MODERIN VS = 15 V, VO = 10 V RL = 100 k RL = 10 k RL = 2 k V+ = 5V, V- = 0 V, 1 V < VO < 4 V RL = 100 k RL = 10 k 700 350 125 1200 600 250 500 250 100 1000 500 200 400 200 100 600 400 200 200 100 400 180 125 75 300 140 100 70 250 140 V+ = 5 V, V- = 0 V V S = 5 V1 0/4 -15/13.5 0/4 -15/13.5 0/4 -15/13.5 13.5 14.2 10.5 11.5 40 4.2 13.5 14.2 10.5 11.5 4.0 4.2 13.5 14.2 V 10.5 11.5 4.0 4.2 V VS = 5 V RL = 10 k RL = 2 k V+ = 5 V, V- = 0 V V+ = 5 V, V- = 0 V RL = 10kn V 50 10 50 10 50 V ttS 80 100 80 100 dB 120 90 120 90 120 10 5.6 10 5.6 3.2 10 V/V VS = 1.5 V VS = 15 V 19 25 30 40 19 25 30 40 19 25 30 40 A AV = +1 No Oscillations 650 650 650 PF fO = 0.1 Hz to 10 Hz VS = 15 V 3 3 3 Vp-p VS = 15 V 30 30 30 M 20 20 20 G 12 V/ms 20 kHz 150 dB INPUT RESISTANCE COMMON-MODE RINCM VS = 15 V SLEW RATE SR AV = +1 VS = 15 V GAIN BANDWIDTH PRODUCT GBWP Vs = +15 V VS = 15 V CS fO = 10 Hz VO = 20 Vp-p VS = 15 V2 CHANNEL SEPARATION2 10 V+ = 5 V, V- = 0 V 0 V < VCM < 4 V 100 VS = 15 V, -15 V < VCM < 13.5 V V/mV 5 12 5 20 120 150 12 5 20 120 150 120 NOTES 1 Guaranteed by CMR test. 2 Guaranteed but not 100% tested. Specifications subject to change without notice. -2- REV. A OP290 ELECTRICAL CHARACTERISTICS (@ VS = 1.5 V to 15 V, -55C TA 125C, unless otherwise noted.) OP290A Parameter Symbol INPUT OFFSET VOLTAGE VOS AVERAGE INPUT OFFSET VOLTAGE DRIFT TCVOS INPUT OFFSET CURRENT INPUT BIAS CURRENT Typ Max Unit 80 500 V VS = 15 V 03 3 V/C IOS VCM = 0 V 0.1 5 nA IB VCM = 0 V 4.2 20 nA AVO VS = 15 V, VO = 10 V RL = 100 k RL = 10 k RL = 2 k V+ = 5 V, V- = 0 V, 1 V < VO < 4 V RL = 100 k RL = 10 k LARGE-SIGNAL VOLTAGE GAIN Conditions Min INPUT VOLTAGE RANGE* IVR V+ = 5 V, V- = 0 V VS = 15 V* OUTPUT VOLTAGE SWING VO VS = 15 V RL = 10 k RL = 2 k V+ = 5 V, V- = 0 V RL = 2 k V+ = 5 V, V- = 0 V RL = 10 k VOH VOL COMMON-MODE REJECTION CMR POWER SUPPLY REJECTION RATIO PSRR SUPPLY CURRENT (All Amplifiers) IsY V+ = 5 V, V- = 0 V, 0 V < VCM < 13.5 V VS = 15 V, -15 V < VCM < 13.5 V VS = 1.5 V VS = 15 V NOTES *Guaranteed by CMR test. Specifications subject to change without notice. REV. A -3- 225 125 50 400 240 110 V/mV 100 50 200 110 0/3.5 -15/13.5 V 13 10 V 14.1 11 10 80 90 100 105 115 V V dB 3.2 10 V/V 30 38 50 60 A OP290 ELECTRICAL CHARACTERISTICS (@ VS = 1.5 V to 15 V, -40C TA 85C for OP290E/OP290F/OP290G, unless otherwise noted.) OP290E Parameter Symbol Conditions Min OP290F Typ Max INPUT OFFSET VOLTAGE VOS Min OP290G Typ Max Min Typ Max Unit 70 400 115 600 200 750 V 0.3 3 0.6 5 1.2 INPUT OFFSET CURRENT IOS VCM = 0 V 01 3 0.1 5 0.1 7 nA INPUT BIAS CURRENT IB 4.2 t5 4.2 20 4.2 25 nA AVERAGE INPUT OFFSET VOLTAGE DRIFT TCVOS LARGE-SIGNAL VOLTAGE GAIN AVO VS = 15 V VCM = 0 V VS = 5 V, VO = 0 V RL = 100 k RL = 10 k RL = 2 k V+ = 5 V, V- = 0 V, 1 V < VO < 4 V RL = 100 k RL = 10 k INPUT VOLTAGE RANGE* IVR V+ = 5 V, V- = 0 V VS = +15 V* OUTPUT VOLTAGE SWING VO VS = 15 V RL = 10 k RL = 2 k VOH V+ = 5 V, V- = 0 V RL = 2 k V+ = 5 V, V- = 0 V VOL RL = 10 k COMMON-MODE REJECTION CMR V+ = 5 V, V- = 0 V, 0 V < VCM < 3.5 V VS = 15 V -15 V < VCM < 13.5 V POWER SUPPLY PSRR REJECTION RATIO SUPPLY CURRENT ISY (All Amplifiers) VS = 1.5 V VS = 15 V V/C V/mV 500 250 100 800 400 200 350 175 75 700 350 150 300 150 75 600 250 125 150 75 280 140 100 50 220 110 80 40 160 90 0/3.5 -15/13.5 0/3.5 -15/13.5 0/3.5 -15/13.5 V 13 10 14 11 13 10 14 11 13 10 14 11 V 3.9 4.1 3.9 4.1 3.9 4.1 V 10 100 10 100 10 85 105 80 100 80 100 95 115 90 110 90 110 100 V dB 3.2 7.5 5.6 10 5.6 15 V/V 24 31 50 60 24 31 50 60 24 31 50 60 A NOTE *Guaranteed by CMR test. Specifications subject to change without notice. -4- REV. A OP290 ABSOLUTE MAXIMUM RATINGS 1 ORDERING GUIDE Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V Differential Input Voltage . . . [(V-) - 20 V] to [(V+) + 20 V] Common-Mode Input Voltage . [(V-) - 20 V] to [(V+) + 20 V] Output Short-Circuit Duration . . . . . . . . . . . . . . . . Indefinite Storage Temperature Range P, S, Z Packages . . . . . . . . . . . . . . . . . . . . . -65C to +150C Operating Temperature Range OP290A . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55C to +125C OP290E, OP290F, OP290G . . . . . . . . . . . . . -40C to +85C Junction Temperature (Tj) . . . . . . . . . . . . . -65C to +150C Lead Temperature Range (Soldering, 60 sec) . . . . . . . 300C Package Type jA2 jC Unit 8-Lead Hermetic DIP (Z) 8-Lead Plastic DIP (P) 16-Lead SOL (S) 134 96 92 12 37 27 C/W C/W C/W NOTES 1 Absolute Maximum Ratings apply to both DICE and packaged parts, unless otherwise noted. 2 jA is specified for worst-case mounting conditions, i.e., jA is specified for device in socket for CERDIP and P-DIP packages; jA is specified for device soldered to printed circuit board for SOL package. TA = 25C VOS Max (mV) 200 200 300 500 500 Package Cerdip 8-Lead Plastic OP290AZ* OP290EZ* OP290FZ* OP290GP OP290GS* MIL XIND XIND XIND XIND *Not for new designs. Obsolete April 2002. For military processed devices, please refer to the Standard Microcircuit Drawing (SMD) available at www.dscc.dla.mil/programs.milspec./default.asp SMD Part Number ADI Part Number 5962-89783012A* 5962-8978301PA* OP290ARCMDA OP290AZMDA *Not for new designs. Obsolete April 2002. CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the OP290 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. REV. A Operating Temperature Range -5- WARNING! ESD SENSITIVE DEVICE OP290 60 40 20 4.4 INPUT BIAS CURRENT - nA 80 4.5 VS = 15V 0.14 0.12 0.1 0.08 0.06 0 0 25 50 75 -75 -50 -25 TEMPERATURE - C VS = 15V 20 16 VS = 1.5V 12 TA = 85 C 400 300 TA = 125 C 200 GAIN 60 40 20 0 5 10 15 20 TEMPERATURE - C 25 0 30 20 0 5 OUTPUT VOLTAGE SWING - V OUTPUT VOLTAGE SWING - V 40 100 1k 10k FREQUENCY - Hz 100k 4 3 2 1 TPC 7. Closed-Loop Gain vs. Frequency 0 100 1k 10k LOAD RESISTANCE - 100k TPC 8. Ouput Voltage Swing vs. Load Resistance -6- 10 15 20 FREQUENCY - Hz 25 30 14 12 10 8 6 4 2 -20 10 5 16 TA = 25 C V+ = 5V, V- = 0V TA = 25 C Vs = 15V 0 TPC 6. Open-Loop Gain and Phase Shift vs. Frequency 6 60 CLOSED-LOOP GAIN - dB 0 TPC 5. Open-Loop Gain vs. Single-Supply Voltage TPC 4. Supply Current vs. Temperature TA = 25 C Vs = 15V RL = 100k 80 8 100 125 100 125 100 100 4 0 25 50 75 -75 -50 -25 TEMPERATURE - C 3.7 120 OPEN-LOOP GAIN - dB OPEN-LOOP GAIN - V/mV SUPPLY CURRENT - A 32 28 3.9 3.8 140 TA = 25 C 500 36 4.0 TPC 3. Input Bias Current vs. Temperature RL = 10k NO LOAD 40 24 100 125 600 44 4.1 3.5 -75 -50 -25 0 25 50 75 TEMPERATURE - C TPC 2. Input Offset Current vs. Temperature TPC 1. Input Offset Voltage vs. Temperature 4.3 4.2 3.6 -75 -50 -25 0 25 50 75 TEMPERATURE - C 100 125 VS = 15V PHASE SHIFT - Degrees VS = 15V INPUT OFFSET CURRENT - nA INPUT OFFSET VOLTAGE - V 100 0 100 TA = 25 C Vs = 15V 1k 10k LOAD RESISTANCE - 100k TPC 9. Output Voltage Swing vs. Load Resistance REV. A Typical Performance Characteristics-OP290 NEGATIVE SUPPLY 120 100 POSITIVE SUPPLY 80 60 120 100 60 40 1 10 100 FREQUENCY - Hz 1 1k TPC 10. Power Supply Rejection vs. Frequency CURRENT NOISE DESTINY- nV/ Hz 1,000 10 100 FREQUENCY - Hz 10 0.1 1k TPC 11. Common-Mode Rejection vs. Frequency 100 100 90 90 10 100 FREQUENCY - Hz 1k TA = 25 C VS = 15V AV = +1 RL = 10k CL = 500pF TA = 25 C VS = 15V AV = +1 RL = 10k CL = 500pF 1 10 10 0% 0% 20mV 1 10 100 FREQUENCY - Hz TPC 13. Current Noise Density vs. Frequency REV. A 1 TPC 12. Noise Voltage Density vs. Frequency TA = 25 C VS = 15V 0.1 0.1 TA = 25 C VS = 15V 100 80 40 10 TA = 25 C VS = 15V NOISE VOLTAGE DESTINY- nV/ Hz 140 TA = 25 C COMMON MODE REJECTION - dB POWER SUPPLY REJECTION - dB 140 100s 5V 1ms 1k TPC 14. Small-Signal Transient Response -7- TPC 15. Large-Signal Transient Response OP290 +18V +15V +15V 8 100k 1/2 2 200 3 1/2 OP290 OP290 1 A 1k V2 OP37A 9k 6 1/2 5 OP290 10k 100 7 -15V 100k -15V VIN 4 1/2 OP290 V1 20Vp-p @ 10Hz B V1 CHANNEL SEPARATION = 20 LOG V2/1000 -18V Figure 3. Channel Separation Test Circuit Figure 2. Burn-In Circuit APPLICATIONS INFORMATION BATTERY-POWERED APPLICATIONS APPLICATIONS TEMPERATURE TO 4-20 mA TRANSMITTER The OP290 can be operated on a minimum supply voltage of 1.6 V, or with dual supplies of 0.8 V, and draws only 19 pA of supply current. In many battery-powered circuits, the OP290 can be continuously operated for thousands of hours before requiring battery replacement, reducing equipment downtime and operating cost. A simple temperature to 4-20 mA transmitter is shown in Figure 5. After calibration, the transmitter is accurate to +0.5C over the -50C to +150C temperature range. The transmitter operates from 8 V to 40 V with supply rejection better than 3 ppm/V. One half of the OP290 is used to buffer the VTEMP pins while the other half regulates the output current to satisfy the current summation at its noninverting input. High-performance portable equipment and instruments frequently use lithium cells because of their long shelf-life, light weight, and high energy density relative to older primary cells. Most lithium cells have a nominal output voltage of 3 V and are noted for a flat discharge characteristic. The low supply voltage requirement of the OP290, combined with the flat discharge characteristic of the lithium cell, indicates that the OP290 can be operated over the entire useful life of the cell. Figure 1 shows the typical discharge characteristic of a 1 Ah lithium cell powering an OP290 with each amplifier, in turn, driving full output swing into a 100 k load. IOUT = VTEMP ( R6 + R7) R2 R6 R7 - VSET R2 R10 R2 R10 LITHIUM SULPHUR DIOXIDE CELL VOLTAGE - V 100 INPUT VOLTAGE PROTECTION The OP290 uses a PNP input stage with protection resistors in series with the inverting and noninverting inputs. The high breakdown of the PNP transistors coupled with the protection resistors provide a large amount of input protection, allowing the inputs to be taken 20 V beyond either supply without damaging the amplifier. 80 60 40 20 0 SINGLE-SUPPLY OUTPUT VOLTAGE RANGE In single-supply operation the OP290's input and output ranges include ground. This allows true "zero-in, zero-out" operation. The output stage provides an active pull-down to around 0.8 V above ground. Below this level, a load resistance of up to 1 MS2 to ground is required to pull the output down to zero. 0 500 1000 1500 2000 HOURS 2500 3000 3500 Figure 4. Lithium Sulphur Dioxide Cell Discharge Characteristic with OP290 and 100 k Loads The change in output current with temperature is the derivative of the transfer function: In the region from ground to 0.8 V, the OP290 has voltage gain equal to the data sheet specification. Output current source capability is maintained over the entire voltage range including ground. IOUT = T -8- VTEMP (R6 + R7) T R2 R10 REV. A OP290 VARIABLE SLEW RATE FILTER From the formulas, it can be seen that if the span trim is adjusted before the zero trim, the two trims are not interactive, which greatly simplifies the calibration procedure. The circuit shown in Figure 6 can be used to remove pulse noise from an input signal without limiting the response rate to a genuine signal. The nonlinear filter has use in applications where the input signal of interest is known to have physical limitations. An example of this is a transducer output where a change of temperature or pressure cannot exceed a certain rate due to physical limitations of the environment. The filter consists of a comparator which drives an integrator. The comparator compares the input voltage to the output voltage and forces the integrator output to equal the input voltage. A1 acts as a comparator with its output high or low. Diodes D1 and D2 clamp the voltage across R3 forcing a constant current to flow in or out of C2. R3, C2, and A2 form an integrator with A2's output slewing at a maximum rate of: Calibration of the transmitter is simple. First, the slope of the output current versus temperature is calibrated by adjusting the span trim, R7. A couple of iterations may be required to be sure the slope is correct. Once the span trim has been completed, the zero trim can be made. Remember that adjusting the offset trim will not affect the gain. The offset trim can be set at any known temperature by adjusting R5 until the output current equals: I FS IOUT = - TMIN ) + 4 mA (T TOPERATING AMBIENT 0.6 V VD R3 C 2 R3 C 2 For an input voltage slewing at a rate under this maximum slew rate, the output simply follows the input with A1 operating in its linear region. Maximum slew rate = Table I shows the values of R6 required for various temperature ranges. Table I. Temperature Range R6 (k) 0C to +70C -40C to +85C -55C to +150C 10 6.2 3 1N4002 V+ 8V TO 40V SPAN TRIM VIN REF-43BZ VOUT VTEMP GND 2 1/2 3 R1 4 R4 20k 2 6 10k R6 8 OP290EZ 1 VTEMP R2 3k 5 1k 1/2 4 R5 5k R3 100k R7 5k VSET 6 ZERO TRIM OP290EZ 7 R8 1k 2N1711 R9 100k R10 100 1%, 1/2W IOUT RLOAD Figure 5. Temperature to 4-20 mA Transmitter REV. A -9- OP290 The 200 variable resistor is used to trim the output voltage. For the lowest temperature drift, parallel resistors can be used in place of the variable resistor and taken out of the circuit as required to adjust the output voltage. +15V R1 8 2 250k C1 0.1F 1/2 OP290GP 1 3 R2 100k V+ 2 VIN R3 1M REF-43FZ C1 R4 D1 D2 25k 5 6 OP290GP 8 2 1/2 GND 4700pF OP290GP 7 1 2N2907A 3 4 1/2 6 VOUT 4 VOUT VOUT R2 4 R1A 2.37 1% -15V R1B 200 20-TURN BOURNS 3006P-1-201 DIODES ARE 1N4148 Figure 6. Variable Slew Rate Filter LOW OVERHEAD VOLTAGE REFERENCE Figure 7 shows a voltage reference that requires only 0.1 V of overhead voltage. As shown, the reference provides a stable 4.5 V output with a 4.6 V to 36 V supply. Output voltage drift is only 12 ppm/C. Line regulation of the reference is under 5 HV/V with load regulation better than 10 V/mA with up to 50 mA of output current. 2k 1% C1 10F C2 0.1F Figure 7. Low Overhead Voltage Reference The REF-43 provides a stable 2.5 V which is multiplied by the OP290. The PNP output transistor enables the output voltage to approach the supply voltage. Resistors R1 and R2 determine the output voltage. R2 VOUT = 2.5 V 1 + R1 -10- REV. A OP290 Revision History Location Page Data Sheet changed from REV. 0 to REV. A. Edits to ORDERING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Edits to PIN CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Edits to ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Edits to PACKAGE TYPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Edits to WAFER TEST LIMITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Edits to DICE CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 REV. A -11- -12- PRINTED IN U.S.A. C00327-0-1/02(A)