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Analog Devices Inc. LT1494IMS8#TRPBF
- Part No.:
- LT1494IMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT1494IMS8#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,455
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Product details
Overview
LT1494IMS8#TRPBF from Analog Devices (formerly Linear Technology) is a single-channel, micropower, precision rail-to-rail input and output operational amplifier with Over-The-Top™ input capability. It delivers 1.5µA max supply current, 375µV max input offset voltage, and operates from 2.2V to 36V supply rails across –40°C to 125°C. It enables high-accuracy signal conditioning in battery-powered remote sensors and portable instrumentation where ultra-low power and wide common-mode range are critical.
For engineers reviewing the LT1494IMS8#TRPBF datasheet, LT1494IMS8#TRPBF pinout, LT1494IMS8#TRPBF application, or LT1494IMS8#TRPBF equivalent, key selection criteria include guaranteed 125°C operation, reverse-battery protection to –18V, rail-to-rail I/O swing, and verified Over-The-Top input functionality above V+ - all in an 8-lead MSOP package.
Technical Context
The LT1494IMS8#TRPBF implements a three-stage architecture: a dual-differential-input stage enabling Over-The-Top operation (inputs up to 36V above V–), a folded-cascode second stage for high open-loop gain (≥100 V/mV), and a rail-to-rail common-emitter output stage supporting ±500µA load current. Its input bias current remains ≤250pA at room temperature and stays below 10nA over full temperature range.
It features internal reverse-battery protection, operates with inputs as low as –0.3V (single-supply) or down to –14.8V (dual-supply), and maintains CMRR ≥72dB and PSRR ≥86dB across its operating temperature range. The device is characterized and guaranteed over –40°C to +125°C (H-grade), with no derating required up to TJ = 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 1.5µA max - enables multi-year battery life in coin-cell or solar-powered systems |
| Input Offset Voltage | 375µV max (TA = –40°C to 125°C) - ensures <0.1% error in 12-bit sensor front-ends |
| Input Offset Drift | 0.4µV/°C typ - minimizes thermal drift in uncalibrated industrial temperature monitoring |
| Rail-to-Rail I/O | Input range: –0.3V to 36V (single-supply); Output swing: within 35mV of rails - maximizes dynamic range at low supply voltages |
| Over-The-Top Input | Inputs operate >V+ - allows direct sensing of high-side signals without level-shifting resistors |
| Reverse Battery Protection | Withstands –18V applied to V– - eliminates need for external series diode in automotive or 12V battery systems |
| Operating Temp Range | –40°C to +125°C (H-grade) - qualified for under-hood, industrial control, and downhole applications |
Pinout & Package
LT1494IMS8#TRPBF is housed in an 8-lead plastic MSOP (MS8) package, 3.0mm × 3.0mm × 0.86mm, with exposed pad for thermal enhancement. Pin 1 is marked by a dot or beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must be left floating or tied to GND per layout best practice |
| 2 (V+) | Positive Supply | Accepts 2.2V to 36V; reverse-battery protected to –18V |
| 3 (OUT) | Amplifier Output | Drives ±500µA; rail-to-rail swing; stable with ≤100pF capacitive load at 30V supply |
| 4 (NC) | No Connect | Internally unused; must be left floating or tied to GND |
| 5 (NC) | No Connect | Internally unused; must be left floating or tied to GND |
| 6 (–IN) | Inverting Input | Part of Over-The-Top differential pair; supports common-mode voltage up to 36V above V– |
| 7 (+IN) | Non-Inverting Input | Part of Over-The-Top differential pair; same common-mode range as –IN |
| 8 (V–) | Negative Supply / Ground | Reference for all inputs/outputs; reverse-battery protected; accepts –18V to +36V relative to system ground |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top Input Architecture | Enables direct high-side sensing without external level shifters or charge pumps |
| 1.5µA Max Supply Current | Reduces quiescent power to <7.5µW at 5V - ideal for energy-harvesting nodes |
| 375µV Max VOS over –40°C to 125°C | Eliminates need for factory calibration in cost-sensitive industrial transmitters |
| Reverse-Battery Protection (–18V) | Removes external blocking diode, saving BOM cost and forward-drop error in battery systems |
| Rail-to-Rail Input & Output | Preserves full ADC input range in 3.3V or lower microcontroller-based data loggers |
| Guaranteed 125°C Operation (H-grade) | Supports deployment in engine control units, motor drives, and oil/gas downhole tools |
Applications
| Remote Sensor Amplifier | Battery-Powered Data Logger |
|---|---|
Use Scenario: Amplifying µV-level thermocouple or strain gauge outputs in unattended field deployments. IC Role / Device Role / Timing Role: Precision DC-coupled signal conditioner with ultra-low input bias current (250pA) and sub-400µV offset. Use Value: Enables use of high-impedance sensor elements (>1MΩ) without significant offset or gain error drift over temperature. |
Use Scenario: Signal conditioning and ADC driver in solar-charged environmental monitoring nodes. IC Role / Device Role / Timing Role: Micropower op amp providing rail-to-rail output swing into SAR ADC reference buffer. Use Value: Delivers 12-bit accuracy while consuming only 1.5µA - extends battery life to >5 years on AA cells. |
| High-Side Current Monitor | Industrial Process Transmitter |
Use Scenario: Measuring load current in 24V industrial PLC outputs using shunt-based sensing. IC Role / Device Role / Timing Role: Over-The-Top amplifier referenced to V+ for direct high-side shunt amplification. Use Value: Eliminates need for isolated power supplies or expensive current-sense amplifiers - reduces BOM cost by >30%. |
Use Scenario: 4–20mA loop transmitter front-end requiring stable performance across –40°C to 85°C ambient. IC Role / Device Role / Timing Role: Precision input buffer and voltage-to-current converter core with 0.4µV/°C offset drift. Use Value: Maintains <0.1% total error over full temperature range without active calibration circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1672IMS8#TRPBF | 2µA max IS, decompensated (AV ≥ 5), 12kHz GBW, same H-grade temp range | Requires minimum noise-gain ≥5; unsuitable for unity-gain buffers or integrators | Select when higher speed (12kHz vs 2.7kHz) is needed and gain ≥5 is acceptable |
| LT1782IS5#TRMPBF | SOT-23-5 package, 55µA IS, 800µV VOS max, shutdown pin, 200kHz GBW | Higher power, lower precision, smaller footprint; includes enable control | Select when board space is constrained and shutdown functionality is required, accepting higher VOS and IS |
Compared with LT1494IMS8#TRPBF, LT1672IMS8#TRPBF trades bandwidth for lower supply current and fixed-gain stability, while LT1782IS5#TRMPBF sacrifices precision and quiescent current for miniaturization and integrated shutdown - making LT1494IMS8#TRPBF optimal for ultra-low-power, high-accuracy, high-temperature analog front-ends.
Availability
LT1494IMS8#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor nodes, and high-temperature industrial transmitters requiring stable component supply and long-term lifecycle support.
Supply support for LT1494IMS8#TRPBF 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 continuity, qualification, and technical support for all Linear op amp families including the LT149x series.
The LT1494IMS8#TRPBF belongs to Linear's Over-The-Top™ precision micropower op amp family, designed specifically for high-accuracy signal conditioning in harsh, power-constrained environments such as automotive, industrial, and remote sensing applications.
FAQ
What is the maximum operating temperature specification for LT1494IMS8#TRPBF?
The LT1494IMS8#TRPBF is an H-grade device, guaranteed to meet all electrical specifications over –40°C to +125°C ambient temperature. Junction temperature may reach 150°C under continuous operation, and thermal design must ensure θJA ≤ 250°C/W for the MS8 package to maintain reliability.
Does LT1494IMS8#TRPBF support true rail-to-rail input operation above the positive supply rail?
Yes - LT1494IMS8#TRPBF implements Over-The-Top™ input architecture, allowing both inputs to operate continuously up to 36V above V–, including voltages exceeding V+. This enables direct high-voltage signal sensing without external level-shifting components.
Can LT1494IMS8#TRPBF be used with a single 3.3V supply?
Yes - LT1494IMS8#TRPBF operates from 2.2V to 36V, and its rail-to-rail input/output stages deliver full dynamic range at 3.3V. Input common-mode range extends from –0.3V to 36V, and output swings within 35mV of each rail, preserving >98% of usable voltage range.
What is the reverse battery protection rating for LT1494IMS8#TRPBF?
LT1494IMS8#TRPBF is rated for reverse battery protection to –18V on the V– pin, with supply current remaining below 100nA (inputs grounded, outputs open). This eliminates the need for external series diodes in 12V/24V battery systems, reducing voltage drop and power loss.
How does LT1494IMS8#TRPBF differ from the LT1494CS8#TRPBF variant?
LT1494IMS8#TRPBF is the H-grade (–40°C to +125°C) version in MSOP-8 packaging, while LT1494CS8#TRPBF is the C-grade (0°C to 70°C) version in SO-8 packaging. Key differences include guaranteed 125°C operation, tighter VOS drift (0.4µV/°C typ), and enhanced PSRR/CMRR specs over temperature for the IMS8 variant.
LT1494IMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Over-The-Top®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.001V/µs
- Gain Bandwidth Product:
- 2.7 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 25 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 1.4µA
- Current - Output / Channel:
- 1.5 mA
- 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-MSOP
LT1494IMS8#TRPBF FAQ
1.How can I place an order for LT1494IMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1494IMS8#TRPBF 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 LT1494IMS8#TRPBF reliable?
The price and inventory of LT1494IMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1494IMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1494IMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1494IMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1494IMS8#TRPBF?
LT1494IMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1494IMS8#TRPBF 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 LT1494IMS8#TRPBF?
For technical support, including LT1494IMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1494IMS8#TRPBF requirements.
6.How does Aetrix verify that LT1494IMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1494IMS8#TRPBF 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 LT1494IMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1494IMS8#TRPBF?
All LT1494IMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1494IMS8#TRPBF, 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 LT1494IMS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1494IMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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