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| a 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: 80 A max High Output Drive: 5 mA min Low Offset Voltage: 0.5 mA max High Open-Loop Gain: 700 V/mV min Outstanding PSRR: 5.6 V/V min Industry Standard Quad Pinouts Available in Die Form GENERAL DESCRIPTION Low Voltage Micropower Quad Operational Amplifier OP490 PIN CONNECTION 14-Pin Hermetic DIP (Y-Suffix) 14-Pin Plastic DIP (P-Suffix) OUT A -IN A +IN A 1 2 3 14 OUT D 13 -IN D 12 +IN D 11 V- 10 +IN C 9 -IN C 8 OUT C V+ 4 +IN B 5 -IN B 6 OUT B 7 The OP490 is a high-performance micropower quad 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 OP490 to accommodate input signals down to ground in single-supply operation. The OP490's output swing also includes ground when operating from a single supply, enabling "zero-in, zero-out" operation. The quad OP490 draws less than 20 A of quiescent supply current per amplifier, but each amplifier is able to deliver over 5 mA of output current to a load. Input offset voltage is under 0.5 mV with offset drift below 5 V/C over the military temperature range. Gain exceeds over 700,000 and CMR is better than 100 dB. A PSRR of under 5.6 V/V minimizes offset voltage changes experienced in battery powered systems. The quad OP490 combines high performance with the space and cost savings of quad amplifiers. The minimal voltage and current requirements of the OP490 makes it ideal for battery and solar powered applications, such as portable instruments and remote sensors. NC 5 +IN A 6 NC 7 V+ 8 NC 9 16-Pin SOL (S-Suffix) OUT A 1 -IN A 2 16 OUT D 15 -IN D 14 +IN D 13 V- 12 +IN C 11 -IN C 10 OUT C 9 NC +IN A 3 V+ 4 +IN B 5 -IN B 6 OUT B 7 NC 8 NC = NO CONNECT 28-Pin LCC (TC-Suffix) OUT A OUT D -IN A -IN D NC NC 4 3 2 1 28 27 26 25 NC 24 +IN D 23 NC 22 V- 21 NC 20 +IN C 19 NC +IN B 10 NC 11 12 NC 13 -IN B 14 OUT B 15 NC 16 OUT C 17 -IN C 18 NC NC = NO CONNECT REV. B 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 which 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: 617/329-4700 Fax: 617/326-8703 NC OP490-SPECIFICATIONS ELECTRICAL CHARACTERISTICS (@ V = S 1.5 V to 15 V, TA = +25 C, unless otherwise noted) Min OP490A/E Typ Max 0.2 0.5 3 15 500 250 100 Min OP490F Typ 0.4 0.4 4.2 1000 500 200 Max 0.75 5 20 400 200 100 Min OP490G Typ Max Units 0.6 0.4 4.2 800 400 200 1.0 5 25 mV nA nA V/mV Parameter INPUT OFFSET VOLTAGE INPUT OFFSET CURRENT INPUT BIAS CURRENT LARGE SIGNAL VOLTAGE GAIN Symbol VOS IOS IB AVO Conditions VCM = 0 V VCM = 0 V 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 V+ = 5 V, V- = 0 V VS = 15 V1 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 V+ = 5 V, V- = 0 V, 0 V < VCM < 4 V VS = 15 V, -15 V < VCM < 13.5 V 700 350 125 0.4 4.2 1200 600 250 200 100 400 180 125 75 0/4 -15/13.5 13.5 10.5 4.0 500 80 90 300 140 100 70 0/4 -15/13.5 250 140 V INPUT VOLTAGE RANGE OUTPUT VOLTAGE SWING IVR VO 0/4 -15/13.5 13.5 14.2 10.5 11.5 4.0 4.2 100 90 100 110 130 14.2 11.5 4.2 100 100 120 500 13.5 10.5 4.0 14.2 11.5 4.2 100 500 V VOH VOL COMMON-MODE REJECTION CMR V V dB 80 90 100 120 POWER SUPPLY REJECTION RATIO SLEW RATE SUPPLY CURRENT (ALL AMPLIFIERS) CAPACITIVE LOAD STABILITY INPUT NOISE VOLTAGE PSRR SR VS = 15 V VS = 1.5 V, No Load VS = 15 V, No Load AV = +1 en p-p fO = 0.1 Hz to 10 Hz VS = 15 V VS = 15 V VS = 15 V AV = +1 fO = 10 Hz VO = 20 V p-p VS = 15 V2 120 5 1.0 12 40 60 650 3 5.6 5 60 80 3.2 12 40 60 650 3 10 5 60 80 3.2 12 40 60 650 3 10 V/V V/ms ISY 60 80 A pF V p-p INPUT RESISTANCE DIFFERENTIAL MODE INPUT RESISTANCE COMMON MODE GAIN BANDWIDTH PRODUCT CHANNEL SEPARATION RIN RINCM GBWP CS 30 30 30 M 20 20 150 120 20 20 150 120 20 20 150 G kHz dB NOTES 1 Guaranteed by CMR test. 2 Guaranteed but not 100% tested. Specifications subject to change without notice. -2- REV. B OP490 ELECTRICAL CHARACTERISTICS Parameter INPUT OFFSET VOLTAGE AVERAGE INPUT OFFSET VOLTAGE DRIFT INPUT OFFSET CURRENT INPUT BIAS CURRENT LARGE-SIGNAL VOLTAGE GAIN VOS TCVOS IOS IB AVO VS = 15 V VCM = 0 V VCM = 0 V 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 V+ = 5 V, V- = 0 V VS = 15 V1 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 V+ = 5 V, V- = 0 V, 0 V < VCM < 3.5 V VS = 15 V, -15 V < VCM < 13.5 V VS = 1.5 V, No Load VS = 15 V, No Load 225 125 50 (@ VS = 1.5 V to 15 V, -55 C TA +125 C, unless otherwise noted) Min OP490A Typ 0.4 2 1.5 4.4 400 240 110 Max 1.0 5 5 20 Units mV V/C nA nA V/mV Symbol Conditions 100 50 0/3.5 -15/13.5 13 10 3.9 200 110 V INPUT VOLTAGE RANGE OUTPUT VOLTAGE SWING IVR VO 13.7 11 4.1 100 500 V VOH VOL COMMON-MODE REJECTION POWER SUPPLY REJECTION RATIO SUPPLY CURRENT (ALL AMPLIFIERS) CMR PSRR ISY V V dB 10 100 120 V/V A 85 95 105 115 3.2 70 90 NOTES 1 Guaranteed by CMR test. Specifications subject to change without notice. REV. B -3- OP490-SPECIFICATIONS (@ VS = 1.5 V to Parameter INPUT OFFSET VOLTAGE AVERAGE INPUT OFFSET VOLTAGE DRIVE ELECTRICAL CHARACTERISTICS OP490G, unless otherwise noted) Symbol VOS TCVOS VS = 15 V 15 V, -25 C TA +85 C for OP490E/F, -40 C TA +85 C for OP490E Typ 0.32 2 Conditions Min Max 0.8 5 Min OP490F Typ 0.6 4 Max 1.35 Min OP490G Typ Max 0.8 4 Units mV V/C 1.5 INPUT OFFSET CURRENT INPUT BIAS CURRENT LARGE SIGNAL VOLTAGE GAIN IOS IB AVO VCM = 0 V VCM = 0 V 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 V+ = 5 V, V- = 0 V VS = 15 V1 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 V+ = 5 V, V- = 0 V, 0 V < VCM < 3.5 V VS = 15 V, -15 V < VCM < 13.5 V 500 250 100 0.8 4.4 800 400 200 3 15 350 175 75 1.0 4.4 700 250 150 5 20 300 150 75 1.3 4.4 600 250 125 7 25 nA nA V/mV 150 75 280 140 100 50 0/3.5 -15/13.5 13 10 3.9 500 80 90 220 110 80 40 0/3.5 -15/13.5 160 90 V INPUT VOLTAGE RANGE OUTPUT VOLTAGE SWING IVR VO 0/3.5 -15/13.5 13 10 3.9 14 11 4.1 100 90 100 110 120 14 11 4.1 100 100 110 500 13 10 3.9 14 11 4.1 100 500 V VOH VOL COMMON-MODE REJECTION CMR V dB 80 90 100 110 POWER SUPPLY REJECTION RATIO SUPPLY CURRENT (ALL AMPLIFIERS) PSRR VS = 1.5 V, No Load VS = 15 V, No Load 1.0 65 80 5.6 100 120 3.2 65 80 10 100 120 5.6 60 75 17.8 100 120 V/V A ISY NOTES 1 Guaranteed by CMR test. Specifications subject to change without notice. SIMPLIFIED SCHEMATIC -4- REV. B OP490 Wafer Test Limits (@ V = S 1.5 V to Symbol VOS IOS IB AVO 15 V, TA = +25 C, unless otherwise noted) Conditions VCM = 0 V VCM = 0 V VS = 15 V, VO = 10 V RL = 100 k RL = 10 k V+ = 5 V, V- = 0 V 1 V < VO < 4 V, RL = 100 k V+ = 5 V, V- = 0 V VS = 15 V1 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 V+ = 5 V, V- = 0 V, 0 V < VCM < 4 V VS = 15 V, -15 V < VCM < 13.5 V VS = 15 V, No Load Limits 0.75 5 20 500 250 125 0/4 -15/13.5 13.5 10.5 4.0 500 80 90 10 80 Units mV max nA max nA max V/mV min V/mV min V min Parameter Input Offset Voltage Input Offset Current Input Bias Current Large Signal Voltage Gain Input Voltage Range Output Voltage Swing IVR VO VOH VOL Common-Mode Rejection Power Supply Rejection Ratio Supply Current (All Amplifiers) CMR PSRR ISY V min V min V max dB min V/V max A max NOTES 1 Guaranteed by CMR test. Electrical tests are performed at wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed for standard product dice. Consult factory to negotiate specifications based on dice lot qualifications through sample lot assembly and testing. ABSOLUTE MAXIMUM RATINGS 1 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 . . . . . . . . . . . . . . .Continuous Storage Temperature Range TC, Y, P Package . . . . . . . . . . . . . . . . . . . -65C to +150C Operating Temperature Range OP490A . . . . . . . . . . . . . . . . . . . . . . . . . . -55C to +125C OP490E, OP490F . . . . . . . . . . . . . . . . . . . -25C to +85C OP490G . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to +85C Junction Temperature (TJ) . . . . . . . . . . . . . -65C to +150C Lead Temperature Range (Soldering, 60 sec) . . . . . . +300C Package Type 14-Pin Hermetic DIP (Y) 14-Pin Plastic DIP (P) 28-Contact LCC (TC) 16-Pin SOL (S) JA 2 JC ORDERING GUIDE1 TA = +25 C VOS max (mV) 0.5 0.5 0.5 0.75 1.0 1.0 Operating Temperature Package Range Description MIL MIL IND IND XIND XIND 14-Pin Cerdip 28-Contact LCC 14-Pin Cerdip 14-Pin Cerdip 14-Pin Plastic DIP 16-Pin SOL Model OP490AY2 OP490ATC/883 OP490EY OP490FY OP490GP OP490GS3 Units C/W C/W C/W C/W 99 76 78 92 12 33 30 27 NOTES 1 Burn-in is available on commercial and industrial temperature range parts in cerdip, plastic DIP and TO-can packages. 2 For devices processed in total compliance to MIL-STD-883, add /883 after part number. Consult factory for 883 data sheet. 3 For availability and burn-in information on SO and PLCC packages, contact your local sales office. DICE CHARACTERISTICS 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, P-DIP, and LCC packages; JA is specified for device soldered to printed circuit board for SOL package. Die Size 0.139 x 0.121 inch, 16,819 sq. mils (3.53 x 3.07 mm, 10.84 sq. mm) REV. B -5- OP490-Typical Performance Characteristics Input Offset Voltage vs. Temperature Input Offset Current vs. Temperature Input Bias Current vs. Temperature Total Supply Current vs. Temperature Open-Loop Gain vs. Single-Supply Voltage Open-Loop Gain and Phase Shift vs. Frequency Closed-Loop Gain vs. Frequency Output Voltage Swing vs. Load Resistance Output Voltage Swing vs. Load Resistance -6- REV. B OP490 Power Supply Rejection vs. Frequency Common-Mode Rejection vs. Frequency Noise Voltage Density vs. Frequency 100 90 100 90 10 0% 10 0% 20mV 100s 5V 1ms TA = 25C VS = 15V AV = +1 RL = 10k CL = 500pF TA = 25C VS = 15V AV = +1 RL = 10k CL = 500pF Current Noise Density vs. Frequency Small-Signal Transient Response Large-Signal Transient Response Burn-In Circuit REV. B -7- OP490 Figure 1. Lithium-Sulphur Dioxide Cell Discharge Characteristic with OP490 and 100 k Loads requirement of the OP490, combined with the flat discharge characteristic of the lithium cell, indicates that the OP490 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 OP490 with each amplifier, in turn, driving full output swing into a 100 k load. SINGLE-SUPPLY OUTPUT VOLTAGE RANGE Channel Separation Test Circuit APPLICATIONS INFORMATION BATTERY-POWERED APPLICATIONS In single-supply operation the OP490'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 M to ground is required to pull the output down to zero. In the region from ground to 0.8 V the OP490 has voltage gain equal to the data sheet specification. Output current source capability is maintained over the entire voltage range including ground. INPUT VOLTAGE PROTECTION The OP490 can be operated on a minimum supply voltage of +1.6 V, or with dual supplies of 0.8 V, and draws only 60 A of supply current. In many battery-powered circuits, the OP490 can be continuously operated for hundreds of hours before requiring battery replacement, reducing equipment downtime and operating costs. 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 current The OP490 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 provides a large amount of input protection, allowing the inputs to be taken 20 V beyond either supply without damaging the amplifier. -8- REV. B OP490 MICROPOWER VOLTAGE-CONTROLLED OSCILLATOR An OP490 in combination with an inexpensive quad CMOS switch comprise the precision VCO of Figure 2. This circuit provides triangle and square wave outputs and draws only 75 A from a 5 V supply. A acts as an integrator; S1 switches the charging current symmetrically to yield positive and negative ramps. The integrator is bounded by B which acts as a Schmitt trigger with a precise hysteresis of 1.67 volts, set by resistors R5, R6, and R7, and associated CMOS switches. The resulting output of A is a triangle wave with upper and lower levels of 3.33 and 1.67 volts. The output of B is a square wave with almost rail-to-rail swing. With the components shown, frequency of operation is given by the equation: f OUT =V CONTROL (Volts) x10 Hz/V but this is easily changed by varying C1. The circuit operates well up to a few hundred hertz. Figure 2. Micropower Voltage Controlled Oscillator REV. B -9- OP490 MICROPOWER SINGLE-SUPPLY QUAD VOLTAGE-OUTPUT 8-BIT DAC The circuit of Figure 3 uses the DAC8408 CMOS quad 8-bit DAC, and the OP490 to form a single-supply quad voltage-output DAC with a supply drain of only 140 A. The DAC8408 is used in voltage switching mode and each DAC has an output resistance (10 k) independent of the digital input code. The output amplifiers act as buffers to avoid loading the DACs. The 100 k resistors ensure that the OP490 outputs will swing below 0.8 V when required. Figure 3. Micropower Single-Supply Quad Voltage Output 8-Bit DAC -10- REV. B OP490 Figure 4. High Output Amplifier HIGH OUTPUT AMPLIFIER The amplifier shown in Figure 4 is capable of driving 25 V p-p into a 1 k load. Design of the amplifier is based on a bridge configuration. A amplifies the input signal and drives the load with the help of B. Amplifier C is a unity-gain inverter which drives the load with help from D. Gain of the high output amplifier with the component values shown is 10, but can easily be changed by varying R1 or R2. SINGLE-SUPPLY MICROPOWER QUAD PROGRAMMABLE GAIN AMPLIFIER present at the DAC, which is easily set by a microprocessor, determines the ratio between the fixed DAC feedback resistor and the resistance of the DAC ladder presents to the op amp feedback loop. Gain of each amplifier is: VOUT 256 =- V IN n where n equals the decimal equivalent of the 8-bit digital code present at the DAC. If the digital code present at the DAC consists of all zeros, the feedback loop will be open causing the op amp output to saturate. The 10 M resistors placed in parallel with the DAC feedback loop eliminates this problem with a very small reduction in gain accuracy. The 2.5 V reference biases the amplifiers to the center of the linear region providing maximum output swing. The combination of quad OP490 and the DAC8408 quad 8-bit CMOS DAC, creates a quad programmable-gain amplifier with a quiescent supply drain of only 140 A. The digital code REV. B -11- OP490 Figure 5. Single Supply Micropower Quad Programmable Gain Amplifier -12- REV. B PRINTED IN U.S.A. |
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