LT2078/LT2079 Micropower, Dual and Quad, Single Supply, Precision Op Amps FEAFEATURESTURES DESCRIPTIODESCRIPTION n The LT 2078 is a micropower dual op amp in 8-pin small Supply Current per Amplifier: 50A Max n outline, standard surface mount package, and LT2079 is Offset Voltage: 70V Max n a micropower quad op amp offered in the standard 14-pin Offset Current: 250pA Max n surface mount package. Both devices are optimized for Voltage Noise: 0.6V , 0.1Hz to 10Hz P-P n single supply operation at 5V. 15V specifications are also Current Noise: 3pA , 0.1Hz to 10Hz P-P n provided. Offset Voltage Drift: 0.4V/C n Gain Bandwidth Product: 200kHz Micropower performance of competing devices is achieved n Slew Rate: 0.07V/s at the expense of seriously degrading precision, noise, n Single Supply Operation speed and output drive specifications. The design effort of Input Voltage Range Includes Ground the LT2078/LT2079 was concentrated on reducing sup- Output Swings to Ground while Sinking Current ply current without sacrificing other parameters. The No Pull-Down Resistors Needed offset voltage achieved is the lowest on any dual or quad n Output Sources and Sinks 5mA Load Current nonchopper stabilized op ampmicropower or other- n SO Package with Standard Pinout wise. Offset current, voltage and current noise, slew rate U U and gain bandwidth product are all two to ten times better APPLICAAPPLICATIOTIONSS than on previous micropower op amps. n Battery or Solar-Powered Systems Both the LT2078/LT2079 can be operated from a single Portable Instrumentation supply (as low as one lithium cell or two NiCd batteries). Remote Sensor Amplifier The input range goes below ground. The all NPN output Satellite Circuitry stage swings to within a few millivolts of ground while n Micropower Sample-and-Hold sinking currentno power consuming pull-down resis- n Thermocouple Amplifier tors are needed. For applications requiring DIP packages n Micropower Filters refer to the LT1078/LT1079. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATYPICAL APPLICATIOTION Single Battery, Micropower, Gain = 100, Instrumentation Amplifier Distribution of Input Offset Voltage 10.1k 1M 800 V = 5V, 0V S 5000 OP AMPS 700 3V 1M 2 (Li-Ion) 600 10.1k A 6 8 1 1/2 LT2078 500 + B 3 7 INVERTING OUT 1/2 LT2078 INPUT 5 + NONINVERTING 400 +INPUT 4 LT2078/79 TA01 300 TYPICAL PERFORMANCE OUTPUT NOISE = 85V 0.1Hz TO 10Hz 200 P-P INPUT OFFSET VOLTAGE = 40V = 300V OVER FULL BANDWIDTH RMS INPUT OFFSET CURRENT = 0.2nA INPUT RANGE = 0.03V TO 1.8V 100 TOTAL POWER DISSIPATION = 240W OUTPUT RANGE = 0.03V TO 2.3V + COMMON MODE REJECTION = 110dB (AMPLIFIER LIMITED) (0.3mV V V 23mV) 0 IN IN 80 40 40 GAIN BANDWIDTH PRODUCT = 200kHz OUTPUTS SINK CURRENTNO PULL-DOWN RESISTORS 120 0 80 120 INPUT OFFSET VOLTAGE (V) 2078/79 TA02 20789fa 1 NUMBER OF OP AMPS UU U ULT2078/LT2079 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage ...................................................... 22V Specified Temperature Range Differential Input Voltage ....................................... 30V Commercial ............................................. 0C to 70C Input Voltage ............... Equal to Positive Supply Voltage Industrial ............................................ 40C to 85C ............5V Below Negative Supply Voltage Storage Temperature Range ................. 65C to 150C Output Short-Circuit Duration .......................... Indefinite Lead Temperature (Soldering, 10 sec).................. 300C PACKAGE/ORDER INFORMATION TOP VIEW ORDER PART ORDER PART NUMBER OUT A 1 14 OUT D NUMBER TOP VIEW IN A 2 13 IN D A D LT2078ACS8 LT2079ACS + OUT A 1 8 V +IN A 3 12 +IN D LT2078AIS8 LT2079AIS + IN A 2 7 OUT B V 4 11 V A LT2078CS8 LT2079CS +IN A 3 6 IN B +IN B 5 10 +IN C B LT2078IS8 B C LT2079IS IN B 6 9 IN C V 4 5 +IN B OUT B 7 8 OUT C PART MARKING S8 PACKAGE 8-LEAD PLASTIC SO S PACKAGE 2078A 2078 14-LEAD PLASTIC SO 2078AI 2078I T = 150C, = 190C/ W T = 150C, = 150C/ W JMAX JA JMAX JA Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS V = 5V, 0V, V = 0.1V, V = 1.4V, T = 25C, unless otherwise noted. S CM O A LT2078AC/LT2078AI LT2078C/LT2078I LT2079AC/LT2079AI LT2079C/LT2079I SYMBOL PARAMETER CONDITIONS (NOTE 2) MIN TYP MAX MIN TYP MAX UNITS V Input Offset Voltage LT2078 30 70 40 120 V OS LT2079 35 110 40 150 V V Long Term Input Offset 0.4 0.5 V/Mo OS Time Voltage Stability I Input Offset Current 0.05 0.25 0.05 0.35 nA OS I Input Bias Current 6 8 6 10 nA B e Input Noise Voltage 0.1Hz to 10Hz (Note 3) 0.6 1.2 0.6 V n P-P Input Noise Voltage Density f = 10Hz (Note 3) 29 45 29 nVHz O f = 1000Hz (Note 3) 28 37 28 nVHz O i Input Noise Current 0.1Hz to 10Hz (Note 3) 2.3 4.0 2.3 pA n P-P Input Noise Current Density f = 10Hz (Note 3) 0.06 0.10 0.06 pAHz O f = 1000Hz 0.02 0.02 pAHz O Input Resistance (Note 4) Differential Mode 400 800 300 800 M Common Mode 6 6 G Input Voltage Range 3.5 3.8 3.5 3.8 V 0 0.3 0 0.3 V CMRR Common Mode Rejection Ratio V = 0V to 3.5V 95 110 92 108 dB CM PSRR Power Supply Rejection Ratio V = 2.3V to 12V 100 114 98 114 dB S 20789fa 2 UUW W U WW