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Analog Devices Inc. LT2078AIS8#PBF
- Part No.:
- LT2078AIS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2078AIS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:195
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Product details
Overview
LT2078AIS8#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. It serves as a low-power signal conditioning front-end in battery-powered instrumentation and remote sensor interfaces.
For engineers reviewing the LT2078AIS8#PBF datasheet, LT2078AIS8#PBF pinout, LT2078AIS8#PBF application, or LT2078AIS8#PBF equivalent, key selection criteria include guaranteed industrial-temperature performance (–40°C to +85°C), sub-100µV offset stability over temperature, and true ground-sinking capability without pull-down resistors - critical for micropower instrumentation amplifiers and thermocouple front-ends.
Technical Context
The LT2078AIS8#PBF employs an all-NPN output stage enabling output swing to within 4.5mV of ground under no-load conditions and 125mV while sinking 100µA, eliminating external pull-down resistors. Its precision is maintained via internal trimming at 5V/0V supplies, with PSRR of 96dB and CMRR of 90dB over the full industrial temperature range.
It delivers 200kHz gain-bandwidth product and 0.07V/µs slew rate at 5V/0V, supporting stable closed-loop operation with capacitive loads up to 15pF. Input bias current remains below 10nA and input offset current below 0.7nA across –40°C to +85°C, ensuring minimal error in high-impedance sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 43–60µA (enables multi-year battery life in portable sensors) |
| Input Offset Voltage | 70µV max (G-grade, –40°C to +85°C; enables <10µV system offset in precision DC amplifiers) |
| Offset Voltage Drift | 0.4–1.8µV/°C (G-grade; ensures <15µV drift over full industrial range) |
| Output Swing Low | 4.5mV above ground (no-load); 125mV at 100µA sink (eliminates need for power-wasting pull-down resistors) |
| Gain Bandwidth Product | 200kHz (supports stable 40Hz low-pass filtering with 5-pole response) |
| Input Noise (0.1–10Hz) | 0.6µVP-P (low-frequency noise critical for thermocouple and strain gauge amplification) |
| Common Mode Rejection | 90–106dB (G-grade; rejects >99.99% of common-mode interference in unbalanced sensor bridges) |
Pinout & Package
LT2078AIS8#PBF is housed in an 8-lead plastic SO (S8) package with standard dual op amp pinout compatible with industry-wide PCB footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input B | High-impedance differential input for second amplifier channel; supports picoampere-level source impedances |
| 2 | Non-inverting Input B | Direct connection to low-noise sensor nodes; immune to phase reversal down to –1V |
| 3 | Output B | Ground-sinking output capable of 5mA sink/source; drives ADC reference buffers without level-shifting |
| 4 | V– | Ground reference for single-supply operation; accepts 0V; not internally tied to substrate |
| 5 | Output A | Primary output for instrumentation amplifier first stage; low-output-impedance (<1Ω at DC) for driving 10kΩ loads |
| 6 | Inverting Input A | Differential input for first amplifier; matched to Pin 1 for <110µV inter-channel VOS mismatch |
| 7 | Non-inverting Input A | High-CMRR input node; maintains >90dB rejection from 0.05V to 3.2V common-mode range |
| 8 | V+ | Positive supply rail; operates from 2.2V to ±22V; functional down to 1.8V (with offset skew) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-ground output sink | Outputs swing to within 4.5mV of ground with no external components - eliminates 12–15kΩ pull-down resistors and associated 300µA quiescent loss |
| Phase reversal protection | Guaranteed non-reversing output even when inputs fall to –1V - prevents lockup in servo and closed-loop sensor systems |
| Low 0.1–10Hz noise | 0.6µVP-P noise enables direct amplification of thermocouple outputs (≈40µV/°C) with <0.1°C resolution |
| Industrial-temp precision | 70µV max VOS and 0.4µV/°C drift (typ) over –40°C to +85°C - suitable for unheated outdoor sensor nodes |
| Single-supply optimized design | Specified fully at 5V/0V with input range extending below ground (to –0.3V) and output sourcing/sinking 5mA - simplifies power architecture in portable devices |
Applications
| Thermocouple Amplifier | Micropower Instrumentation Amplifier |
|---|---|
Use Scenario: Amplifying µV-level thermocouple outputs (e.g., Type K, 41µV/°C) in wireless temperature nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Precision front-end amplifier providing gain ≥100 with <10µV total input-referred offset and sub-1µV/°C drift contribution. Use Value: Enables ±0.2°C accuracy over –20°C to +70°C without calibration, extending battery life beyond 5 years via 50µA/channel quiescent current. | Use Scenario: Building a 3-op-amp instrumentation amplifier for bridge-based pressure sensors in handheld medical devices. IC Role / Device Role / Timing Role: Dual op amp implementing both input buffers (A & B channels) with matched VOS (<110µV) and IB (<10nA). Use Value: Achieves >100dB CMRR without trimming, rejects EMI-induced common-mode transients, and sustains 200kHz bandwidth for fast step-response diagnostics. |
| Remote Sensor Signal Conditioning | Battery-Powered Data Logger Front-End |
Use Scenario: Conditioning signals from high-impedance pH or ion-selective electrodes in field-deployable environmental monitors. IC Role / Device Role / Timing Role: Ultra-low-input-bias amplifier (IB <10nA) driving 1MΩ+ source impedances without significant DC error or drift. Use Value: Maintains <0.5% gain accuracy over 10-year deployment with no recalibration, leveraging 0.4µV/°C drift and 0.7nA max IOS over temperature. | Use Scenario: Analog front-end for 16-bit SAR ADC in solar-powered soil moisture loggers operating on Li-ion cells. IC Role / Device Role / Timing Role: Dual-channel signal conditioner providing programmable gain, anti-alias filtering, and rail-to-rail output drive into ADC reference input. Use Value: Delivers 85µVP-P (0.1–10Hz) output noise and 200kHz GBW - sufficient for 1ksps sampling with 70dB SNR, while consuming <100µA total. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift architecture; 0.1µV/°C max drift vs. LT2078AIS8#PBF's 1.8µV/°C max; higher 17µA supply current per amp | Better long-term drift stability but higher power; unsuitable where ground-sinking without pull-downs is mandatory | Select OPA2333AIDR only if ultra-low drift dominates over micropower and ground-sink capability |
| AD8602ARZ-REEL7 | Higher 1mA supply current; 60µV max VOS but only specified at 25°C (not over full –40°C to +85°C range) | Lacks guaranteed industrial-temp VOS/drift specs; output does not swing to ground while sinking - requires pull-down resistors | Select AD8602ARZ-REEL7 only for non-battery applications where speed (8MHz GBW) outweighs power and rail-to-ground requirements |
Compared with OPA2333AIDR and AD8602ARZ-REEL7, LT2078AIS8#PBF uniquely combines guaranteed industrial-temperature precision, true ground-sinking output, and 50µA/channel micropower operation - making it irreplaceable in long-life, single-supply sensor nodes where every microamp and millivolt matters.
Availability
LT2078AIS8#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor amplifiers, and micropower data loggers requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LT2078AIS8#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LT2078AIS8#PBF belongs to Linear's legacy micropower precision op amp family, engineered specifically for single-supply, low-voltage sensor signal conditioning where ultra-low power, rail-to-ground output, and industrial-grade precision must coexist.
FAQ
What is the maximum guaranteed input offset voltage for LT2078AIS8#PBF over its full operating temperature range?
The LT2078AIS8#PBF has a maximum input offset voltage of 70µV over the full industrial temperature range of –40°C to +85°C, as specified in the "ELECTRICAL CHARACTERISTICS" table under LT2078AI/LT2079AI conditions. This is a guaranteed limit, not a typical value, and applies to all units meeting the I-grade specification.
Does LT2078AIS8#PBF require external pull-down resistors to achieve ground-level output swing?
No, LT2078AIS8#PBF does not require external pull-down resistors. Its all-NPN output stage sinks current to within 4.5mV of ground under no-load conditions and 125mV while sinking 100µA - a core feature explicitly highlighted in the datasheet to eliminate power-wasting resistors in micropower designs.
Can LT2078AIS8#PBF operate from a single 3.3V supply?
Yes, LT2078AIS8#PBF is fully specified down to 2.2V minimum supply voltage and functions reliably at 3.3V. The datasheet confirms operation from "one lithium cell or two NiCd batteries", and typical performance data (e.g., output swing, GBW, noise) is provided at 5V/0V and ±2.5V - confirming robustness at low voltages.
What is the guaranteed input bias current specification for LT2078AIS8#PBF across temperature?
The LT2078AIS8#PBF guarantees a maximum input bias current of 10nA over the full –40°C to +85°C industrial temperature range (G-grade), as documented in the "ELECTRICAL CHARACTERISTICS" table for LT2078AI/LT2079AI. This enables use with MΩ-range source impedances without significant DC error.
Is LT2078AIS8#PBF pin-compatible with other dual op amps in SO-8 packages?
Yes, LT2078AIS8#PBF uses the industry-standard SO-8 dual op amp pinout (pin 1 = In–B, pin 2 = In+B, pin 3 = OutB, pin 4 = V–, pin 5 = OutA, pin 6 = In–A, pin 7 = In+A, pin 8 = V+), matching LM358, OP290, and AD8602 footprints - enabling drop-in replacement where electrical specs align.
LT2078AIS8#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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT2078AIS8#PBF FAQ
1.How can I place an order for LT2078AIS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2078AIS8#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 LT2078AIS8#PBF reliable?
The price and inventory of LT2078AIS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2078AIS8#PBF is usually 5 days.
3.What payment methods are accepted for LT2078AIS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2078AIS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2078AIS8#PBF?
LT2078AIS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2078AIS8#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 LT2078AIS8#PBF?
For technical support, including LT2078AIS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2078AIS8#PBF requirements.
6.How does Aetrix verify that LT2078AIS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT2078AIS8#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 LT2078AIS8#PBF meets industry standards.
7.What is the process for return or replacement of LT2078AIS8#PBF?
All LT2078AIS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2078AIS8#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 LT2078AIS8#PBF part is unused and in its original packaging.
Return procedure for LT2078AIS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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