LT1078/LT1079 Micropower, Dual and Quad, Single Supply, Precision Op Amps DESCRIPTIO FEATURES Available in 8-Pin SO Package The LT 1078 is a micropower dual op amp in 8-pin 50A Max Supply Current per Amplifier packages including the small outline surface mount pack- 70V Max Offset Voltage age. The LT1079 is a micropower quad op amp offered in 180 V Max Offset Voltage in 8-Pin SO the standard 14-pin packages. Both devices are optimized 250pA Max Offset Current for single supply operation at 5V. 15V specifications are 0.6 V , 0.1Hz to 10Hz Voltage Noise also provided. P-P 3pA , 0.1Hz to 10Hz Current Noise P-P Micropower performance of competing devices is achieved 0.4 V/C Offset Voltage Drift at the expense of seriously degrading precision, noise, 200kHz Gain Bandwidth Product speed and output drive specifications. The design effort of 0.07V/ s Slew Rate the LT1078/LT1079 was concentrated on reducing sup- Single Supply Operation ply current without sacrificing other parameters. The Input Voltage Range Includes Ground offset voltage achieved is the lowest on any dual or quad Output Swings to Ground while Sinking Current nonchopper stabilized op ampmicropower or other- No Pull-Down Resistors Needed wise. Offset current, voltage and current noise, slew rate Output Sources and Sinks 5mA Load Current and gain bandwidth product are all two to ten times better than on previous micropower op amps. U APPLICATIO S The 1/f corner of the voltage noise spectrum is at 0.7Hz, at least three times lower than on any monolithic op amp. Battery or Solar-Powered Systems This results in low frequency (0.1Hz to 10Hz) noise Portable Instrumentation performance which can only be found on devices with an Remote Sensor Amplifier order of magnitude higher supply current. Satellite Circuitry Micropower Sample-and-Hold Both the LT1078 and LT1079 can be operated from a Thermocouple Amplifier single supply (as low as one lithium cell or two Ni-Cad Micropower Filters batteries). The input range goes below ground. The all- NPN output stage swings to within a few millivolts of ground while sinking currentno power consuming pull , LTC and LT are registered trademarks of Linear Technology Corporation. down resistors are needed. Distribution of Input Offset Voltage TYPICAL APPLICATIO (LT1078 and LT1079 in H, J, N Packages) Single Battery, Micropower, Gain = 100, Instrumentation Amplifier 16 10.1k 1M V = 5V, 0V S T = 25C 14 A 3V (LITHIUM CELL) 1M 2 12 10.1k 8 A 1 6 10 1/2 LT1078 B 3 + 7 INVERTING OUT 1/2 LT1078 8 INPUT 5 + NONINVERTING 4 6 INPUT + LT1078/79 TA01 4 TYPICAL PERFORMANCE OUTPUT NOISE = 85V 0.1Hz TO 10Hz P-P INPUT OFFSET VOLTAGE = 40V = 300V OVER FULL BANDWIDTH RMS 2 INPUT OFFSET CURRENT = 0.2nA INPUT RANGE = 0.03V TO 1.8V TOTAL POWER DISSIPATION = 240W OUTPUT RANGE = 0.03V TO 2.3V 0 + COMMON MODE REJECTION = 110dB (AMPLIFIER LIMITED) (0.3mV V V 23mV) IN IN 120 80 40 0 40 80 120 GAIN BANDWIDTH PRODUCT = 200kHz OUTPUTS SINK CURRENTNO PULL-DOWN RESISTORS INPUT OFFSET VOLTAGE ( V) 1078/79 TA02 ARE NEEDED 10789fe 1 PERCENT OF UNITS U ULT1078/LT1079 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage ...................................................... 22V Operating Temperature Range Differential Input Voltage ....................................... 30V LT1078AM/LT1078M/ Input Voltage ............... Equal to Positive Supply Voltage LT1079AM/LT1079M (OBSOLETE) .....55C to 125C ............5V Below Negative Supply Voltage LT1078I/LT1079I .................................... 40C to 85C Output Short-Circuit Duration .......................... Indefinite LT1078AC/LT1078C/LT1078S8/ Storage Temperature Range LT1079AC/LT1079C .................................... 0C to 70C All Grades ......................................... 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C PACKAGE/ORDER INFORMATION TOP VIEW TOP VIEW TOP VIEW + V +IN A 1 8 IN A + OUT A 1 8 V 8 A V 2 7 OUT A OUT A 1 7 OUT B IN A 2 7 OUT B A + +IN B V AB 3 6 +IN A 3 6 IN B IN A 2 6 IN B B B IN B 4 5 OUT B V +IN B 4 5 5 3 +IN B +IN A S8 PACKAGE 4 N8 PACKAGE 8-LEAD PLASTIC SO 8-LEAD PDIP V (CASE) NOTE: THIS PIN CONFIGURATION DIFFERS FROM THE T = 100C, = 130C/ W (N8) H PACKAGE JMAX JA 8-LEAD DIP PIN LOCATIONS. INSTEAD, IT FOLLOWS 8-LEAD TO-5 METAL CAN THE INDUSTRY STANDARD LT1013DS8 SO PACKAGE ORDER PART NUMBER CONFIGURATION. FOR SIMILAR PERFORMANCE WITH TRADITIONAL DIP PINOUT, SEE THE LT2078 T = 150C, = 150C/ W, = 45C/ W JMAX JA JC LT1078ACN8 T = 110C, = 220C/ W JMAX JA LT1078CN8 ORDER PART NUMBER ORDER PART NUMBER LT1078IN8 LT1078ACH LT1078IS8 LT1078MH LT1078S8 J8 PACKAGE 8-LEAD PDIP T = 150C, = 100C/ W (J8) JMAX JA PART MARKING LT1078AMJ8 OBSOLETE PACKAGES 1078 Consider the N8 and S8 Packages for Alternate Source LT1078MJ8 TOP VIEW TOP VIEW ORDER PART ORDER PART OUT A 1 14 OUT D OUT A 1 16 OUT D NUMBER NUMBER IN A 2 13 IN D IN A 2 15 IN D A D A D LT1079ISW LT1079ACN +IN A 3 12 +IN D +IN A 3 14 +IN D + + LT1079SW LT1079CN V 4 11 V V 4 13 V +IN B 5 10 +IN C LT1079IN +IN B 5 12 +IN C B C B C IN B 6 9 IN C IN B 6 11 IN C OUT B 7 8 OUT C OUT B 7 10 OUT C NC 8 9 NC N PACKAGE 14-LEAD PDIP SW PACKAGE T = 110C, = 130C/ W (N) JMAX JA 16-LEAD PLASTIC SO WIDE J PACKAGE NOTE: FOR 14-PIN NARROW LT1079MJ 14-LEAD CERAMIC DIP PACKAGE SEE THE LT2079 T = 150C, = 100C/ W (J) JMAX JA T = 110C, = 150C/ W JMAX JA OBSOLETE PACKAGE Consider the N Packages for Alternate Source 10789fe 2 U W U W U WW