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Analog Devices Inc. LT2078IS8#PBF
- Part No.:
- LT2078IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2078IS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:101
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Product details
Overview
LT2078IS8#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, 200kHz gain bandwidth product, and rail-to-rail output swing to ground while sinking current-enabling low-power sensor amplification in battery-powered instrumentation.
For engineers reviewing the LT2078IS8#PBF datasheet, LT2078IS8#PBF pinout, LT2078IS8#PBF application, or LT2078IS8#PBF equivalent, key selection criteria include micropower consumption under 60µA, sub-100µV offset stability over temperature, single-supply compatibility down to 2.2V, and verified phase-reversal immunity when inputs dip 1V below ground.
Technical Context
The LT2078IS8#PBF employs an all-NPN output stage enabling true ground-swing capability without pull-down resistors, unlike competing micropower op amps. Its input stage includes series protection resistors preventing destructive substrate conduction during negative transients beyond –5V.
It delivers precision performance across industrial temperature range (–40°C to +85°C), with guaranteed 0.4µV/°C offset drift and 90dB min common-mode rejection ratio over full operating conditions-critical for thermocouple and remote sensor front-ends where signal integrity must be preserved amid supply and common-mode variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 45–70 µA - enables multi-year battery life in portable sensors and satellite telemetry nodes |
| Input Offset Voltage | 70 µV max (G-grade) - ensures <1mV error in 100× gain instrumentation amplifiers at room temperature |
| Offset Voltage Drift | 0.4 µV/°C typ - maintains <10µV total drift over 0°C to 85°C industrial range |
| Gain Bandwidth Product | 200 kHz - supports stable closed-loop operation up to 20kHz in unity-gain buffer or difference amplifier configurations |
| Output Swing (Low) | ≤170 mV above ground at 100µA sink - eliminates need for power-wasting pull-down resistors in micropower designs |
| Input Voltage Range | Extends 0.3V below V– (ground) - allows direct interfacing with transducers producing slightly negative signals |
| Phase Reversal Immunity | None observed at –1V input (VS = 5V, 0V) - prevents lockup in servo and feedback control loops during transient undershoot |
Pinout & Package
LT2078IS8#PBF is housed in an 8-lead plastic SOIC (S8) package with standard dual op amp pinout per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input A | High-impedance differential input node for first amplifier; accepts signals down to –0.3V relative to V– |
| 2 | Noninverting Input A | High-impedance differential input node for first amplifier; bias current ≤10nA ensures minimal resistor-induced offset |
| 3 | Output A | Class-AB NPN output capable of sourcing/sinking ±5mA; swings within 170mV of ground while sinking |
| 4 | V– | Negative supply terminal; tied to ground in single-supply mode; internal protection limits reverse current |
| 5 | Noninverting Input B | Second amplifier input; matched to Pin 2 for differential applications requiring inter-amplifier tracking |
| 6 | Inverting Input B | Second amplifier input; matched to Pin 1 for precision dual-channel configurations |
| 7 | Output B | Independent output stage identical to Pin 3; supports dual-path signal conditioning without crosstalk degradation |
| 8 | V+ | Positive supply terminal; operates from 2.2V to ±22V; PSRR ≥96dB minimizes supply noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Ground-swing output without pull-down resistors | Reduces quiescent power by >300µA in instrumentation amplifier topologies where both outputs sink current |
| Phase reversal immunity to –1V input | Prevents catastrophic latch-up in closed-loop systems exposed to ESD or transient undershoot on sensor lines |
| Picoampere-level input bias current | Enables use of >1MΩ source impedances in thermocouple and pH electrode interfaces without significant offset error |
| Guaranteed industrial temperature performance | Full electrical specs validated from –40°C to +85°C-not just characterized-ensuring reliability in outdoor and automotive environments |
| Low 0.1Hz–10Hz noise | 0.6µVP-P enables high-resolution DC-coupled measurements in medical and scientific instrumentation |
Applications
| Remote Sensor Amplifier | Thermocouple Amplifier |
|---|---|
Use Scenario: Amplifying microvolt-level signals from RTDs or strain gauges located meters away in industrial monitoring systems. IC Role / Device Role / Timing Role: Dual-channel precision instrumentation front-end providing gain, common-mode rejection, and low-noise buffering before ADC sampling. Use Value: 70µV max offset and 0.4µV/°C drift ensure <±20µV total error over 85°C ambient range-critical for Class A temperature accuracy. | Use Scenario: Cold-junction compensation and linearization of Type-K thermocouple outputs in furnace controllers. IC Role / Device Role / Timing Role: Precision difference amplifier with matched input pairs rejecting common-mode noise from long thermocouple leads. Use Value: 90dB CMRR and picoampere input bias allow use of high-value thermistor networks without loading error or self-heating. |
| Micropower Sample-and-Hold | Battery-Powered Portable Instrumentation |
Use Scenario: Low-leakage hold capacitor charging in handheld multimeters and data loggers operating from coin cells. IC Role / Device Role / Timing Role: Unity-gain buffer isolating the hold capacitor from ADC input impedance during acquisition phase. Use Value: 50µA supply current per amplifier extends battery life to >5 years in intermittent-read applications; 0.6µVP-P noise preserves 16-bit effective resolution. | Use Scenario: Signal conditioning in handheld gas analyzers, environmental monitors, and field-deployable test equipment. IC Role / Device Role / Timing Role: Dual op amp performing simultaneous sensor excitation and signal amplification from a single 3.3V or 5V Li-ion supply. Use Value: Single-supply operation from 2.2V minimum and ground-swing output eliminate need for charge pumps or negative rails-reducing BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2050CS8#PBF | Zero-drift architecture; 0.5µV max offset, 0.005µV/°C drift; higher supply current (170µA); chopper noise at 100kHz | Better DC accuracy but unsuitable for low-noise analog front-ends sensitive to switching artifacts | Select LTC2050CS8#PBF only when ultra-low drift dominates over noise and power constraints |
| OPA2333AIDR | Zero-drift; 12µV max offset; 0.02µV/°C drift; 17µA supply current; rail-to-rail I/O; no phase reversal immunity | Lower power and better DC specs, but lacks –1V input tolerance-requires external clamping for robust field deployment | Select OPA2333AIDR for ultra-low-power portable devices where input transients are fully controlled |
Compared with LTC2050CS8#PBF and OPA2333AIDR, LT2078IS8#PBF uniquely balances micropower (≤70µA), precision (70µV offset), and ruggedness (–1V input, ground-swing output), making it optimal for unregulated battery-powered systems requiring both accuracy and fault tolerance.
Availability
LT2078IS8#PBF is available at Aetrix Electronics and suitable for remote sensor amplification, thermocouple conditioning, micropower sample-and-hold circuits, and battery-powered portable instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LT2078IS8#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 continues its legacy of high-performance analog ICs for precision signal conditioning and power management.
The LT2078 product line was designed specifically for micropower, single-supply precision applications-including battery-operated instrumentation, remote sensing, and satellite telemetry-where ultra-low supply current must not compromise offset, noise, or output drive.
FAQ
What is the maximum supply voltage rating for LT2078IS8#PBF?
The absolute maximum supply voltage for LT2078IS8#PBF is ±22V across V+ and V– terminals. Operation at ±15V is fully specified in the datasheet, with guaranteed performance including 200kHz GBW and 0.07V/µs slew rate. For single-supply use, V– is grounded and V+ may range from 2.2V to 22V, with 5V being the primary characterization condition for micropower optimization.
Does LT2078IS8#PBF require external pull-down resistors to achieve ground output swing?
No, LT2078IS8#PBF does not require external pull-down resistors. Its all-NPN output stage sinks current to within 170mV of ground at 100µA load-verified across the full –40°C to +85°C industrial temperature range. This eliminates the 150–300µA quiescent current penalty typical of competing micropower op amps like OP-290 or OP-490 that mandate pull-down resistors for ground swing.
What is the guaranteed input offset voltage specification for LT2078IS8#PBF over temperature?
LT2078IS8#PBF guarantees a maximum input offset voltage of 250µV over the full industrial temperature range (–40°C to +85°C), with typical performance at 95µV. The offset voltage drift is specified at 0.4µV/°C typical and 2.5µV/°C maximum, ensuring predictable, bounded error accumulation across operating conditions-critical for long-duration data logging and calibration-stable systems.
Can LT2078IS8#PBF operate from a single 3.3V supply?
Yes, LT2078IS8#PBF is fully functional from a single 3.3V supply (V+ = 3.3V, V– = 0V). The minimum specified supply voltage is 2.2V, and performance metrics-including 70µV max offset, 200kHz GBW, and ground-swing output-are validated at 5V and ±15V. At 3.3V, supply current remains ≤60µA, common-mode range extends to 0.05V–2.8V, and output swing reaches within 130mV of ground while sinking 100µA.
How does LT2078IS8#PBF handle input voltages below ground?
LT2078IS8#PBF incorporates internal series input resistors that protect against destructive substrate conduction when inputs fall as low as –5V below V– (ground). It exhibits no phase reversal at –1V input under 5V single-supply conditions-a key differentiator versus LM158, OP-290, or HA5141. This enables direct connection to transducers with negative transients without external clamping diodes or level-shifting circuitry.
LT2078IS8#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:
- 70 µV
- Current - Supply:
- 47µA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT2078IS8#PBF FAQ
1.How can I place an order for LT2078IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2078IS8#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 LT2078IS8#PBF reliable?
The price and inventory of LT2078IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2078IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT2078IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2078IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2078IS8#PBF?
LT2078IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2078IS8#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 LT2078IS8#PBF?
For technical support, including LT2078IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2078IS8#PBF requirements.
6.How does Aetrix verify that LT2078IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT2078IS8#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 LT2078IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT2078IS8#PBF?
All LT2078IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2078IS8#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 LT2078IS8#PBF part is unused and in its original packaging.
Return procedure for LT2078IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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