Datasheet LT2178, LT2179 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 17µA Max, Dual and Quad, Single Supply, Precision Op Amps |
| Pages / Page | 12 / 1 — FEATURES. DESCRIPTION. SO Package with Standard Pinout. Supply Current … |
| File Format / Size | PDF / 215 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. SO Package with Standard Pinout. Supply Current per Amplifi er: 17μA Max. Offset Voltage: 70μV Max
Model Line for this Datasheet
Text Version of Document
LT2178/LT2179 17µA Max, Dual and Quad, Single Supply, Precision Op Amps
FEATURES DESCRIPTION
n
SO Package with Standard Pinout
The LT®2178 is a micropower dual op amp in a surface n
Supply Current per Amplifi er: 17μA Max
mount standard 8-pin confi guration, the LT2179 is a n
Offset Voltage: 70μV Max
micropower quad op amp offered in a surface mount n Offset Current: 250pA Max 14-pin package. Both devices are optimized for single n Input Bias Current: 5nA Max supply operation at 5V. Specifi cations are also provided n Voltage Noise: 0.9μVP-P, 0.1Hz to 10Hz at ±15V supply. n Current Noise: 1.5pAP-P, 0.1Hz to 10Hz The extremely low supply current is combined with true n Offset Voltage Drift: 0.5μV/°C precision specifi cations: offset voltage is 30μV and offset n Gain Bandwidth Product: 85kHz current is 50pA. Both offset parameters have low drift with n Slew Rate: 0.04V/μs temperature. The 1.5pAP-P current noise and picoampere n Single Supply Operation offset current permit the use the megohm level source Input Voltage Range Includes Ground resistors without introducing serious errors. Voltage Output Swings to Ground while Sinking Current noise, at 0.9μVP-P, is remarkably low considering the low No Pull-Down Resistors Needed supply current. n Output Sources and Sinks 5mA Load Current The LT2178/LT2179 can be operated from a single supply (as low as one lithium-cell or two NiCd batteries). The input
APPLICATIONS
range goes below ground. The all-NPN output stage swings n to within a few millivolts of ground while sinking current. Battery- or Solar-Powered Systems No power consuming pull down resistors are needed. Portable Instrumentation Remote Sensor Amplifi er For surface mount applications where three times higher Satellite Circuitry supply current is acceptable, the micropower LT1077 n Micropower Sample-and-Hold single, LT2078 dual and LT2079 quad are recommended. n Thermocouple Amplifi er The LT1077/LT2078/LT2079 have signifi cantly higher n Micropower Filters bandwidth, slew rate, lower voltage noise and better output L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear drive capability. For applications requiring DIP packages Technology Corporation. All other trademarks are the property of their respective owners. refer to the LT1178/LT1179.
TYPICAL APPLICATION Self-Buffered, Dual Output, Micropower Reference Supply Current vs Temperature
TOTAL BATTERY CURRENT = 28mA 20 OUTPUT ACCURACY = p0.4% MAX 2 – TEMPERATURE COEFFICIENT = 20ppm/°C 1 1.2365V LOAD REGULATION = 25ppm/mA, IL ≤ 5mA, V+ ≥ 5V 18 1/2 LT2178 OUTPUT LINE REGULATION = 10ppm/V V 3 + S = p15V 4V TO 9V * 0.1% FILM RESISTORS 4 16 5 + 8 250k 7 2.470V 1/2 LT2178 14 VS = 5V, 0V OUTPUT 6 – 2M 0.1μF 0.1μF 12 VS = p1.5V LT1004-1.2 SUPPLY CURRENT PER AMPLIFIER A) 1M* 1M* 10 21789 TA01 –50 –25 0 25 50 75 100 TEMPERATURE (°C) 21789 TA02 21789fc 1
FEATURES DESCRIPTION
n
SO Package with Standard Pinout
The LT®2178 is a micropower dual op amp in a surface n
Supply Current per Amplifi er: 17μA Max
mount standard 8-pin confi guration, the LT2179 is a n
Offset Voltage: 70μV Max
micropower quad op amp offered in a surface mount n Offset Current: 250pA Max 14-pin package. Both devices are optimized for single n Input Bias Current: 5nA Max supply operation at 5V. Specifi cations are also provided n Voltage Noise: 0.9μVP-P, 0.1Hz to 10Hz at ±15V supply. n Current Noise: 1.5pAP-P, 0.1Hz to 10Hz The extremely low supply current is combined with true n Offset Voltage Drift: 0.5μV/°C precision specifi cations: offset voltage is 30μV and offset n Gain Bandwidth Product: 85kHz current is 50pA. Both offset parameters have low drift with n Slew Rate: 0.04V/μs temperature. The 1.5pAP-P current noise and picoampere n Single Supply Operation offset current permit the use the megohm level source Input Voltage Range Includes Ground resistors without introducing serious errors. Voltage Output Swings to Ground while Sinking Current noise, at 0.9μVP-P, is remarkably low considering the low No Pull-Down Resistors Needed supply current. n Output Sources and Sinks 5mA Load Current The LT2178/LT2179 can be operated from a single supply (as low as one lithium-cell or two NiCd batteries). The input
APPLICATIONS
range goes below ground. The all-NPN output stage swings n to within a few millivolts of ground while sinking current. Battery- or Solar-Powered Systems No power consuming pull down resistors are needed. Portable Instrumentation Remote Sensor Amplifi er For surface mount applications where three times higher Satellite Circuitry supply current is acceptable, the micropower LT1077 n Micropower Sample-and-Hold single, LT2078 dual and LT2079 quad are recommended. n Thermocouple Amplifi er The LT1077/LT2078/LT2079 have signifi cantly higher n Micropower Filters bandwidth, slew rate, lower voltage noise and better output L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear drive capability. For applications requiring DIP packages Technology Corporation. All other trademarks are the property of their respective owners. refer to the LT1178/LT1179.
TYPICAL APPLICATION Self-Buffered, Dual Output, Micropower Reference Supply Current vs Temperature
TOTAL BATTERY CURRENT = 28mA 20 OUTPUT ACCURACY = p0.4% MAX 2 – TEMPERATURE COEFFICIENT = 20ppm/°C 1 1.2365V LOAD REGULATION = 25ppm/mA, IL ≤ 5mA, V+ ≥ 5V 18 1/2 LT2178 OUTPUT LINE REGULATION = 10ppm/V V 3 + S = p15V 4V TO 9V * 0.1% FILM RESISTORS 4 16 5 + 8 250k 7 2.470V 1/2 LT2178 14 VS = 5V, 0V OUTPUT 6 – 2M 0.1μF 0.1μF 12 VS = p1.5V LT1004-1.2 SUPPLY CURRENT PER AMPLIFIER A) 1M* 1M* 10 21789 TA01 –50 –25 0 25 50 75 100 TEMPERATURE (°C) 21789 TA02 21789fc 1
