Precision Low-Voltage Micropower a Operational Amplifier OP90 FEATURES PIN CONNECTIONS 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 8-Lead Epoxy Mini-DIP Low Supply Current: 20 A Max (P-Suffix) High Output Drive: 5 mA Min 8-Lead SO Low Input Offset Voltage: 150 V Max (S-Suffix) High Open-Loop Gain: 700 V/mV Min Outstanding PSRR: 5.6 V/V Max 1 8 V NULL NC Standard 741 Pinout with Nulling to V OS 2 7 IN V+ +IN 3 6 OUT V 4 5 V NULL OS GENERAL DESCRIPTION NC = NO CONNECT The OP90 is a high performance, micropower op amp that operates from a single supply of 1.6 V to 36 V or from dual external nulling. Gain exceeds 700,000 and common-mode supplies of 0.8 V to 18 V. The input voltage range includes rejection is better than 100 dB. The power supply rejection the negative rail allowing the OP90 to accommodate input ratio of under 5.6 V/V minimizes offset voltage changes experi- signals down to ground in a single-supply operation. The OP90s enced in battery-powered systems. output swing also includes a ground when operating from a The low offset voltage and high gain offered by the OP90 bring single-supply, enabling zero-in, zero-out operation. precision performance to micropower applications. The minimal The OP90 draws less than 20 A of quiescent supply current, voltage and current requirements of the OP90 suit it for battery while able to deliver over 5 mA of output current to a load. The and solar powered applications, such as portable instruments, input offset voltage is below 150 V eliminating the need for remote sensors, and satellites. V+ +IN OUTPUT IN ** NULL NULL V *ELECTRONICALLY ADJUSTED ON CHIP FOR MINIMUM OFFSET VOLTAGE Figure 1. Simplied Schematic REV. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties that Tel: 781/329-4700 www.analog.com may result from its use. No license is granted by implication or otherwise 781/461-3113 under any patent or patent rights of Analog Devices. Fax: Analog Devices, Inc., OP90 SPECIFICATIONS ELECTRICAL CHARACTERISTICS (V = 1.5 V to 15 V, TA = 25C, unless otherwise noted.) S OP90G Unit Parameter Symbol Conditions Min Typ Max INPUT OFFSET VOLTAGE V 125 450 V OS INPUT OFFSET CURRENT I V = 0 V 0.4 5 nA OS CM INPUT BIAS CURRENT 4.0 25 nA I V = 0 V B CM LARGE-SIGNAL V = 15 V, V = 10 V S O VOLTAGE GAIN R = 100 k A L 400 800 V/mV VO R = 10 k A L 200 400 V/mV VO R = 2 k A 100 200 V/mV L VO V+ = 5 V, V = 0 V, 1 V < V < 4 V O 100 250 V/mV A R = 100 k VO L A 70 140 V/mV VO R = 10 k L 1 INPUT VOLTAGE RANGE IVR 0/4 V V+ = 5 V, V = 0 V V = 15 V 15/13.5 V S OUTPUT VOLTAGE SWING V V = 15 V O S R = 10 k 14 14.2 V L R = 2 k L 11 12 V V V+ = 5 V, V = 0 V OH R = 2 k 4.0 4.2 L V V OL V+ = 5 V, V = 0 V R = 10 k 100 500 L V COMMON-MODE CMR V+ = 5 V, V = 0 V, REJECTION 0 V < V < 4 V CM 80 100 dB CMR V = 15 V, S 90 120 dB 15 V < V < 13.5 V CM POWER SUPPLY REJECTION RATIO PSRR 3.2 10 V/V SLEW RATE SR 5 12 V/ms V = 15 V S SUPPLY CURRENT I V = 1.5 V 9 15 A SY S I V = 15 V 14 20 A SY S A = 1 CAPACITIVE LOAD V 2 STABILITY 250 650 pF No Oscillations INPUT NOISE VOLTAGE e f = 0.1 Hz to 10 Hz O n p-p 3 V p-p V = 15 V S INPUT RESISTANCE DIFFERENTIAL MODE R V = 15 V 30 M IN S INPUT RESISTANCE COMMON-MODE 20 G R V = 15 V INCM S NOTES 1Guaranteed by CMR test. 2Guaranteed but not 100% tested. Specifications subject to change without notice. Rev. C Page 2 of 13