Features and Benefits
- Available in 8-Pin SO Package
- 50µA Max Supply Current per Amplifier
- 70µV Max Offset Voltage
- 180µA Max Offset Voltage in 8-Pin SO
- 250pA Max Offset Current
- 0.6µVP-P, 0.1Hz to 10Hz Voltage Noise
- 3pAP-P, 0.1Hz to 10Hz Current Noise
- 0.4µV/°C Offset Voltage Drift
- 200kHz Gain Bandwidth Product
- 0.07V/µs Slew Rate
- Single Supply Operation
- Input Voltage Range Includes Ground
- Output Swings to Ground while Sinking Current
- No Pull-Down
- Output Sources and Sinks 5mA Load Current
The LT1078 is a micropower dual op amp in 8-pin packages including the small outline surface mount package. The LT1079 is a micropower quad op amp offered in the standard 14-pin packages. Both devices are optimized for single supply operation at 5V. ±15V specifications are also provided.
Micropower performance of competing devices is achieved at the expense of seriously degrading precision, noise, speed and output drive specifications. The design effort of the LT1078/LT1079 was concentrated on reducing supply current without sacrificing other parameters. The offset voltage achieved is the lowest on any dual or quad nonchopper stabilized op amp—micropower or otherwise. Offset current, voltage and current noise, slew rate and gain bandwidth product are all two to ten times better than on previous micropower op amps.
The 1/f corner of the voltage noise spectrum is at 0.7Hz, at least three times lower than on any monolithic op amp. This results in low frequency (0.1Hz to 10Hz) noise performance which can only be found on devices with an order of magnitude higher supply current.
Both the LT1078 and LT1079 can be operated from a single supply (as low as one lithium cell or two Ni-Cad batteries). The input range goes below ground. The all-NPN output stage swings to within a few millivolts of ground while sinking current—no power consuming pull down resistors are needed.
- Battery or Solar-Powered Systems
- Portable Instrumentation
- Remote Sensor Amplifier
- Satellite Circuitry
- Micropower Sample-and-Hold
- Thermocouple Amplifier
- Micropower Filters
Markets and Technologies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
R046 Reliability Data3/23/201821 K
AN141 - Risk Assessment Advice for High Reliability Amplifiers10/7/2013292K
AN61 - Practical Circuitry for Measurement and Control Problems2/5/20131M
AN45 - Measurement and Control Circuit Collection11/29/20121M
AN43 - Bridge Circuits7/10/20123M
AN92 - Bias Voltage and Current Sense Circuits for Avalanche Photodiodes1/7/20091M
AN67 - Linear Technology Magazine Circuit Collection, Volume III8/20/20071M
AN48 - Using the LTC Op Amp Macromodels8/20/2007289K
DN40 - Designing with a New Family of Instrumentation Amplifiers6/28/2016540K
DN23 - Micropower, Single Supply Applications: (1) A Self-Biased, Buffered Reference (2) Megaohm Input Impedance Difference Amplifier6/28/2016194K
DN56 - 3V Operation of Linear Technology Op Amps7/24/201476K
DN42 - Chopper vs Bipolar Op Amps—An Unbiased Comparison7/24/201468K
Design Note 45: Signal Conditioning for Platinum Temperature Transducers3/1/1991
High Voltage Amplifiers9/10/2013368K
Consider New Precision Amplifiers for Updated Industrial Equipment Designs9/1/2009 LT Journal
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
Use the Analog Filter Wizard to design low-pass, high-pass, or band-pass filters with actual op amps in minutes. As you progress through the design process, you can observe the characteristics of your filter design from ideal specifications to real world circuit behavior. Quickly evaluate the tradeoffs in op amp specifications - including gain-bandwidth, noise, and supply current – to determine the best filter design for your requirements.
LT1078 Companion Parts
Recommended Related Parts
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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