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Analog Devices Inc. LT1490AHS8#TRPBF
- Part No.:
- LT1490AHS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1490AHS8#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,579
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Product details
Overview
LT1490AHS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual micropower rail-to-rail input/output operational amplifier designed for high-voltage, low-power sensing and conditioning in harsh environments. It operates from 2.5V to 44V total supply, draws only 40–50μA per amplifier, features ±15V common-mode input range beyond V–, and delivers 20mA output drive - enabling direct battery monitoring and current-sense amplification without external gain stages.
For engineers reviewing the LT1490AHS8#TRPBF datasheet, LT1490AHS8#TRPBF pinout, LT1490AHS8#TRPBF application, or LT1490AHS8#TRPBF equivalent, this page provides verified package mapping (SO-8), temperature-rated specs (–40°C to 125°C), Over-The-Top® input behavior, reverse-battery protection (18V), and real-world design meaning for supply-current sensing, solar charge control, and industrial sensor interfaces.
Technical Context
The LT1490AHS8#TRPBF implements a dual-input-stage architecture (NPN + PNP) enabling operation with inputs up to 44V above V– independent of V+, eliminating phase reversal even at 15V below V–. Its Over-The-Top® topology maintains high input impedance across the full common-mode range while supporting single-supply operation down to 2.5V.
Internally compensated for unity-gain stability, it drives capacitive loads up to 10,000pF using optional 0.22μF/150Ω output compensation. The device is reverse-supply protected (≤18V reverse voltage), draws <1nA quiescent current when V+ is removed, and exhibits no supply sequencing issues - critical for battery-backed systems and automotive power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 44V total - supports wide-input industrial sensors and 12V/24V/48V battery systems without level-shifting. |
| Quiescent Current | 40–50μA per amplifier - enables multi-year operation on coin cells or energy-harvesting sources. |
| Input Offset Voltage | 500μV max (–40°C to 125°C) - ensures ≤1mV error in 2V-range current-sense shunt measurements. |
| Output Drive | 20mA sink/source - directly drives LEDs, MOSFET gates, or 1kΩ load resistors without buffers. |
| Input Common-Mode Range | 0.3V to 44V beyond V– - enables high-side current sensing in 48V telecom or EV battery packs. |
| Gain Bandwidth Product | 110kHz typical (–40°C to 125°C) - sufficient for DC–10kHz sensor signal conditioning with stable phase margin. |
| CMRR | 74dB min (0.3V to 44V CM range) - rejects supply ripple and ground noise in noisy industrial environments. |
Pinout & Package
LT1490AHS8#TRPBF is housed in an 8-lead plastic SO (S8) package, 5.0mm × 4.0mm × 1.5mm, rated for –40°C to 125°C operation. Thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Rail-to-rail swing (≤15mV from rails) drives loads up to 20mA; compatible with ADC reference buffers. |
| 2 (–IN A) | Inverting input A | High-impedance node (≥6MΩ) accepts differential signals across full supply range; no clamping diodes. |
| 3 (+IN A) | Non-inverting input A | Same Over-The-Top® range as –IN A; enables high-side sensing with V– referenced feedback. |
| 4 (V–) | Negative supply | Reverse-battery protected; underside metal pad (in DFN variants) tied to V– for thermal/EMI performance. |
| 5 (+IN B) | Non-inverting input B | Independent second channel for dual-path monitoring (e.g., battery voltage + temperature). |
| 6 (–IN B) | Inverting input B | Matches Pin 2 specs; supports matched dual configurations like instrumentation amp front-ends. |
| 7 (OUT B) | Amplifier B output | Electrically identical to Pin 1; enables simultaneous processing of two analog signals. |
| 8 (V+) | Positive supply | Bypass with 0.01μF near pin; tolerates fast transients up to 1μs rise time with ≥7.5Ω damping. |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® Input Stage | Enables input voltages up to 44V above V– regardless of V+, allowing direct connection to unregulated battery strings. |
| Rail-to-Rail I/O | Output swings within 15mV of V– and 75mV of V+ at 2.5mA load - maximizes dynamic range in low-voltage microcontroller interfaces. |
| Reverse Battery Protection | Draws <1nA at –18V reverse supply - prevents system damage during battery swap or polarity misconnection. |
| No Phase Reversal | Guaranteed over full input range (–15V to +44V relative to V–) - eliminates latch-up risk in fault-tolerant power monitors. |
| Unity-Gain Stable | Drives 10,000pF with external RC compensation - supports long-cable sensor interfaces without oscillation. |
Applications
| Battery Voltage Monitoring | High-Side Current Sensing |
|---|---|
Use Scenario: Real-time tracking of 12V/24V/48V lead-acid or Li-ion battery packs in UPS, solar charge controllers, and EV auxiliary systems. IC Role / Device Role / Timing Role: Dual op-amp configured as precision differential amplifier (Channel A) and reference buffer (Channel B) for ADC input scaling. Use Value: 500μV max VOS ensures ≤0.5% full-scale error in 20V battery range; 125°C rating supports under-hood automotive placement. | Use Scenario: Measuring motor or load current in industrial PLC outputs, HVAC actuators, and DC power supplies using shunt resistors. IC Role / Device Role / Timing Role: High-side current sense amplifier with gain-setting resistors; Channel A processes shunt voltage, Channel B buffers reference. Use Value: 44V-over-V– input range allows direct connection to shunt placed between load and 48V bus; 20mA drive eliminates need for output buffer stage. |
| Solar Panel MPPT Interface | Micropower Sensor Signal Conditioning |
Use Scenario: Converting photovoltaic panel voltage and current into analog signals for microcontroller-based maximum power point tracking (MPPT) algorithms. IC Role / Device Role / Timing Role: Dual-channel signal conditioner: Channel A measures panel voltage (high-impedance divider), Channel B measures shunt-based current. Use Value: 40μA per amplifier enables >5-year operation on supercapacitor backup; reverse supply protection guards against panel shading-induced backfeed. | Use Scenario: Amplifying low-level outputs from thermistors, RTDs, strain gauges, or MEMS sensors in battery-powered IoT nodes and portable instrumentation. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail input preamplifier with gain ≥100; second channel used for offset nulling or reference generation. Use Value: 1μVP-P (0.1–10Hz) noise and 50nV/√Hz density preserve SNR in sub-mV sensor signals; 2.5V min supply supports direct Li-SOCl₂ cell operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1490ACS8#TRPBF | Same architecture but rated 0°C to 70°C; 110μV max VOS (0°C–70°C) vs 500μV (–40°C–125°C). | Not suitable for under-hood, industrial, or extended-temperature deployments. | Select only for commercial-grade consumer devices with ambient cooling. |
| ADA4077-2ARZ | Lower VOS (10μV typ), higher GBW (1MHz), but narrower supply (±5V to ±15V); no Over-The-Top® input. | Cannot replace LT1490AHS8#TRPBF in high-side sensing or 44V-input applications. | Choose for precision lab instrumentation where ultra-low offset dominates over input range. |
Compared with LT1490ACS8#TRPBF, the LT1490AHS8#TRPBF trades slightly higher offset for guaranteed 125°C operation and robustness in automotive/industrial power domains; versus ADA4077-2ARZ, it sacrifices offset and bandwidth to deliver unique Over-The-Top® functionality essential for battery and bus monitoring.
Availability
LT1490AHS8#TRPBF is available at Aetrix Electronics and suitable for battery management systems, solar charge controllers, and industrial current-sensing applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1490AHS8#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 continues its legacy of high-performance analog ICs for precision signal conditioning, power management, and interface solutions.
The LT1490AHS8#TRPBF belongs to Linear's Over-The-Top® op amp family, engineered specifically for high-voltage, low-power sensing in battery-powered and industrial systems where input signals exceed the positive supply rail.
FAQ
What is the maximum common-mode input voltage for LT1490AHS8#TRPBF?
The LT1490AHS8#TRPBF supports a common-mode input voltage range of 0.3V to 44V beyond V–, independent of V+. This Over-The-Top® capability allows direct connection to high-side shunts or battery terminals without level-shifting - a key differentiator confirmed in the datasheet's Electrical Characteristics table for LT1490AH grade.
Does LT1490AHS8#TRPBF require external compensation for capacitive loads?
LT1490AHS8#TRPBF is internally compensated for unity-gain stability and drives ≥200pF capacitively. For loads >200pF (up to 10,000pF), the datasheet specifies optional 0.22μF/150Ω series RC compensation from output to ground. This configuration is validated in Typical Application TA04 and ensures stable operation without peaking or oscillation.
What is the guaranteed input offset voltage specification for LT1490AHS8#TRPBF over temperature?
Per the datasheet's Electrical Characteristics (page 6), LT1490AHS8#TRPBF has a guaranteed maximum input offset voltage of 500μV over the full operating temperature range of –40°C to 125°C. This value is explicitly listed for the LT1490AH grade in the S8 package column and applies to all conditions specified in Note 4.
Can LT1490AHS8#TRPBF operate with a single 3V supply?
Yes - LT1490AHS8#TRPBF operates from a minimum total supply voltage of 2.5V, making it fully functional on a single 3V supply. Its rail-to-rail input and output stages enable full-swing signal handling (e.g., 0–3V output with 3V supply), and key specs like GBW (110kHz) and VOS (500μV max) are guaranteed at 3V per the datasheet's test conditions.
Is LT1490AHS8#TRPBF reverse supply protected, and to what voltage?
Yes - LT1490AHS8#TRPBF is reverse supply protected up to 18V, drawing less than 1nA quiescent current during reverse bias. This is confirmed in the Absolute Maximum Ratings table (page 3) and Applications Information section (page 11), where reverse-battery protection is highlighted as a core feature for automotive and field-serviceable equipment.
LT1490AHS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.06V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 nA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 50µA (x2 Channels)
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 2 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1490AHS8#TRPBF FAQ
1.How can I place an order for LT1490AHS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1490AHS8#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 LT1490AHS8#TRPBF reliable?
The price and inventory of LT1490AHS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1490AHS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1490AHS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1490AHS8#TRPBF transactions.
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4.How is shipping managed for LT1490AHS8#TRPBF?
LT1490AHS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1490AHS8#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 LT1490AHS8#TRPBF?
For technical support, including LT1490AHS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1490AHS8#TRPBF requirements.
6.How does Aetrix verify that LT1490AHS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1490AHS8#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 LT1490AHS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1490AHS8#TRPBF?
All LT1490AHS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1490AHS8#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 LT1490AHS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1490AHS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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