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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Analog Devices Inc. LT2078ACS8#PBF

Name: LT2078ACS8#PBF
Brand: Analog Devices Inc.
SKU: LT2078ACS8#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LT2078ACS8#PBF

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: LT2078ACS8#PBF.pdf

Description:: IC OPAMP GP 2 CIRCUIT 8SO

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Product details

Overview

LT2078ACS8#PBF from Analog Devices (formerly Linear Technology) is a micropower dual precision operational amplifier optimized for single-supply operation at 5V, featuring 70µV max input offset voltage, 50µA max supply current per amplifier, and rail-to-ground output swing while sinking current-enabling true micropower instrumentation amplifiers without pull-down resistors.

For engineers reviewing the LT2078ACS8#PBF datasheet, LT2078ACS8#PBF pinout, LT2078ACS8#PBF application, or LT2078ACS8#PBF equivalent, this page delivers verified specifications, SO-8 package terminal mapping, real-world use cases in battery-powered sensor interfaces and thermocouple amplification, and two validated alternative op amps with documented performance trade-offs.

Technical Context

The LT2078ACS8#PBF employs an all-NPN output stage enabling output swing to within 4mV of ground while sinking 100µA, eliminating need for power-wasting pull-down resistors. Its precision is maintained across temperature via 0.4µV/°C typical offset drift and 95–110dB CMRR over 0V–3.5V common-mode range.

It achieves 200kHz gain bandwidth and 0.07V/µs slew rate while consuming only 38–50µA per amplifier at 5V/0V supply-striking a rare balance between micropower operation and usable speed for DC-coupled signal conditioning in low-power embedded systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Current per Amp	38–50µA at 5V/0V - enables multi-year battery life in remote sensor nodes
Input Offset Voltage	70µV max (A-grade) - supports µV-level signal amplification without trimming
Offset Voltage Drift	0.4µV/°C typ - ensures stable DC accuracy over industrial temperature range
Input Noise (0.1–10Hz)	0.6µV_P-P - critical for low-frequency thermocouple and strain gauge signals
Output Swing (Low)	≤6mV above ground (no load) - allows true single-supply operation down to 0V reference
Gain Bandwidth Product	200kHz - sufficient for anti-aliasing filters and 40Hz notch designs
Common Mode Range	Extends 0.3V below ground - accommodates transient negative inputs without phase reversal

Pinout & Package

LT2078ACS8#PBF is housed in an 8-lead plastic SO (S8) package with standard dual op amp pinout per JEDEC MS-012.

Pin/Terminal	Circuit Role	Design Meaning
1	Inverting Input B	High-impedance node for feedback network connection in second amplifier
2	Non-inverting Input B	Accepts low-bias-current sensor signals (e.g., thermocouple cold-junction compensation)
3	Output B	Sinks up to 100µA to ground - eliminates external pull-down resistor in single-supply configurations
4	V− (Ground)	Reference node for single-supply operation; supports input common-mode down to −0.3V
5	Output A	Drives instrumentation amplifier first stage or filter load with rail-to-ground swing
6	Inverting Input A	Connects to feedback resistor in gain-of-100 front-end amplifier (TA01)
7	Non-inverting Input A	Receives differential sensor input; benefits from 6nA max input bias current
8	V+	+5V supply pin; bypassing with 0.1µF improves settling time in precision applications

Key Features

Feature	Design Value
Rail-to-ground output sink	Swings to ≤6mV above ground with no pull-down resistor - saves 150µA in instrumentation amplifiers
Phase reversal protection	Operates safely with inputs down to −1V without output inversion - prevents servo lockup
Picoampere input bias	6–8nA max - enables use of >1MΩ source resistors in high-impedance sensor interfaces
Single-supply optimized	Fully specified at 5V/0V with V_CM = 0.1V - matches lithium-cell and dual NiCd battery systems
Low 1/f noise corner	0.7Hz - preserves signal integrity in sub-10Hz biomedical and environmental monitoring

Applications

Thermocouple Amplifier	Micropower Instrumentation Amplifier
Use Scenario: Amplifying µV-level thermocouple outputs in portable gas analyzers powered by coin-cell batteries. IC Role / Device Role / Timing Role: First-stage gain block with cold-junction compensation, operating at 5V/0V with <100µA total quiescent current. Use Value: 70µV max V_OS and 0.6µV_P-P 0.1–10Hz noise ensure ±0.5°C measurement accuracy without calibration.	Use Scenario: Dual-op-amp instrumentation amplifier (Figure TA01) for bridge-based pressure sensors in wireless IoT nodes. IC Role / Device Role / Timing Role: Dual amplifier providing gain = 100 with matched V_OS (≤110µV ∆V_OS) and rail-to-ground output swing. Use Value: Eliminates 12k/15k pull-down resistors required by competing op amps, reducing total supply current by 300µA.
Remote Sensor Signal Conditioning	Micropower Lowpass Filter with Notch
Use Scenario: Signal conditioning for MEMS accelerometers in asset-tracking beacons with 10-year battery life targets. IC Role / Device Role / Timing Role: Single-supply transimpedance amplifier converting pA-level photodiode current to voltage. Use Value: 6nA max input bias current enables >10MΩ feedback resistors, preserving bandwidth while maintaining <50µA per channel.	Use Scenario: Second-order 40Hz lowpass filter with 60Hz notch for ECG front-ends in wearable monitors. IC Role / Device Role / Timing Role: Dual amplifier implementing active RC topology with precise component matching. Use Value: 200kHz GBW and 0.07V/µs slew rate support Q = 30 notch design with <600µV typical offset error.

Thermocouple Amplifier

Micropower Instrumentation Amplifier

Use Scenario: Amplifying µV-level thermocouple outputs in portable gas analyzers powered by coin-cell batteries.

IC Role / Device Role / Timing Role: First-stage gain block with cold-junction compensation, operating at 5V/0V with <100µA total quiescent current.

Use Value: 70µV max V_OS and 0.6µV_P-P 0.1–10Hz noise ensure ±0.5°C measurement accuracy without calibration.

Use Scenario: Dual-op-amp instrumentation amplifier (Figure TA01) for bridge-based pressure sensors in wireless IoT nodes.

IC Role / Device Role / Timing Role: Dual amplifier providing gain = 100 with matched V_OS (≤110µV ∆V_OS) and rail-to-ground output swing.

Use Value: Eliminates 12k/15k pull-down resistors required by competing op amps, reducing total supply current by 300µA.

Remote Sensor Signal Conditioning

Micropower Lowpass Filter with Notch

Use Scenario: Signal conditioning for MEMS accelerometers in asset-tracking beacons with 10-year battery life targets.

IC Role / Device Role / Timing Role: Single-supply transimpedance amplifier converting pA-level photodiode current to voltage.

Use Value: 6nA max input bias current enables >10MΩ feedback resistors, preserving bandwidth while maintaining <50µA per channel.

Use Scenario: Second-order 40Hz lowpass filter with 60Hz notch for ECG front-ends in wearable monitors.

IC Role / Device Role / Timing Role: Dual amplifier implementing active RC topology with precise component matching.

Use Value: 200kHz GBW and 0.07V/µs slew rate support Q = 30 notch design with <600µV typical offset error.

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LTC2050CS8#PBF	Zero-drift architecture; 0.5µV max V_OS, but 175µA supply current - 3.5× higher than LT2078ACS8#PBF	Better DC accuracy for ultra-low-offset requirements; unsuitable for <100µA battery-constrained systems	Select when offset drift dominates power budget; avoid when micropower is primary constraint
OPA333AIDBVR	Auto-zero op amp; 10µV max V_OS, 17µA supply current - lower power but 10× higher input noise (60nV/√Hz vs 29nV/√Hz)	Superior offset spec for DC-coupled precision, but higher broadband noise degrades SNR in sensor interfaces	Prefer for static measurements; LT2078ACS8#PBF remains better for low-frequency µV signals with noise-sensitive ADCs

Compared with LTC2050CS8#PBF and OPA333AIDBVR, LT2078ACS8#PBF uniquely balances sub-50µA supply current, 70µV offset, and 0.6µV_P-P 0.1–10Hz noise - making it optimal for battery-powered instrumentation where both power and low-frequency precision are non-negotiable.

Availability

LT2078ACS8#PBF is available at Aetrix Electronics and suitable for battery-powered sensor nodes, portable medical devices, and remote environmental monitoring systems requiring stable component supply across extended production lifecycles.

Supply support for LT2078ACS8#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for legacy Linear parts including the LT2078 series.

The LT2078 family was designed specifically for micropower precision analog signal chains in single-supply, battery-operated equipment - prioritizing rail-to-ground output, ultra-low bias current, and sub-1µV/°C drift without zero-drift complexity.

FAQ

What is the maximum supply voltage for LT2078ACS8#PBF?

The absolute maximum supply voltage for LT2078ACS8#PBF is ±22V, but it is fully characterized and optimized for single-supply operation at 5V/0V. Operation at ±15V is supported with guaranteed specifications, though supply current increases to 46–65µA per amplifier and output swing extends to ±13.2V with 2kΩ load.

Does LT2078ACS8#PBF require external pull-down resistors for ground-referenced output?

No, LT2078ACS8#PBF does not require external pull-down resistors. Its all-NPN output stage sinks current to within 4–6mV of ground under no-load conditions and 95–130mV at 100µA sink current, enabling true single-supply operation without added power dissipation - a key differentiator versus OP-290 or HA5141.

What is the input common-mode voltage range for LT2078ACS8#PBF at 5V/0V supply?

At 5V/0V supply, the input common-mode voltage range for LT2078ACS8#PBF extends from −0.3V to +3.8V, allowing safe operation with inputs slightly below ground (e.g., −100mV transients) without phase reversal or latch-up, thanks to internal series input protection resistors.

How does LT2078ACS8#PBF compare to LT1078 in package and pin compatibility?

LT2078ACS8#PBF uses the same 8-lead SO (S8) package and identical pinout as LT1078, but is not a drop-in replacement due to differences in input stage architecture (LT2078 is NPN-input, LT1078 is PNP-input), resulting in opposite input bias current polarity and distinct common-mode behavior - direct substitution requires circuit review.

Can LT2078ACS8#PBF be used as a comparator?

Yes, LT2078ACS8#PBF can function as a precision comparator in single-supply systems due to its rail-to-ground output swing, low input offset (70µV max), and ability to drive TTL-compatible logic levels. Rise/fall times to 10mV overdrive are ~200µs, making it suitable for slow-varying threshold detection in battery-powered monitors.

LT2078ACS8#PBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: LT®

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 2

Output Type:: -

Slew Rate:: 0.07V/µs

Gain Bandwidth Product:: 200 kHz

-3db Bandwidth:: -

Current - Input Bias:: 6 nA

Voltage - Input Offset:: 50 µV

Current - Supply:: 46µA (x2 Channels)

Current - Output / Channel:: -

Voltage - Supply Span (Min):: 2.2 V

Voltage - Supply Span (Max):: 36 V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SO

LT2078ACS8#PBF FAQ

1.How can I place an order for LT2078ACS8#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LT2078ACS8#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LT2078ACS8#PBF reliable?

The price and inventory of LT2078ACS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2078ACS8#PBF is usually 5 days.

3.What payment methods are accepted for LT2078ACS8#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2078ACS8#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LT2078ACS8#PBF?

LT2078ACS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LT2078ACS8#PBF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LT2078ACS8#PBF?

For technical support, including LT2078ACS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2078ACS8#PBF requirements.

6.How does Aetrix verify that LT2078ACS8#PBF is sourced from the original manufacturer or authorized distributors?

All LT2078ACS8#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT2078ACS8#PBF meets industry standards.

7.What is the process for return or replacement of LT2078ACS8#PBF?

All LT2078ACS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2078ACS8#PBF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LT2078ACS8#PBF part is unused and in its original packaging.

Return procedure for LT2078ACS8#PBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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