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Analog Devices Inc. LT1636IMS8#PBF
- Part No.:
- LT1636IMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT1636IMS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,113
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Product details
Overview
LT1636IMS8#PBF from Analog Devices (formerly Linear Technology) is a micropower rail-to-rail input/output operational amplifier with Over-The-Top® input stage, enabling common-mode operation up to 44V above VEE on supplies as low as 2.7V. It delivers 18mA output drive, 225µV max input offset voltage (0°C–70°C), 220kHz gain-bandwidth product, and operates across –40°C to 125°C. It is used in battery monitoring, sensor conditioning, and high-side current sensing where input voltage exceeds the positive rail.
For engineers reviewing the LT1636IMS8#PBF datasheet, LT1636IMS8#PBF pinout, LT1636IMS8#PBF application, or LT1636IMS8#PBF equivalent, this page provides verified specifications, MS8 package pin mapping, shutdown behavior, reverse-battery protection (27V), and real-world use cases including MUX amplifiers and 4mA–20mA transmitters - all confirmed for the IMS8 temperature-grade variant.
Technical Context
The LT1636IMS8#PBF employs a dual-input-stage architecture (PNP + NPN) enabling Over-The-Top® operation: inputs remain functional and high-impedance even when biased 44V above VEE, independent of VCC. Its shutdown pin (Pin 5) reduces quiescent current from 50µA to 4µA while placing the output in high-impedance state.
It achieves rail-to-rail output swing (e.g., 4.95V high / 10mV low on 5V supply), drives ≥10,000pF capacitive loads with external 0.22µF + 150Ω compensation, and features built-in reverse-battery protection (27V) and input fault protection down to 22V below VEE - with no phase reversal for inputs 5V below VEE or 44V above VEE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 44V total - supports single-supply industrial sensors and dual ±15V instrumentation without redesign. |
| Quiescent Current | 50µA typical (active), 4µA in shutdown - enables multi-year battery life in portable instrumentation. |
| Input Offset Voltage | 225µV max (0°C–70°C, MS8 package) - ensures <0.5% error in precision current-sense applications at 100mV sense voltage. |
| Gain-Bandwidth Product | 220kHz (±15V), 200kHz (5V) - sufficient for DC–10kHz signal conditioning in sensor front-ends and transmitter loops. |
| Output Drive | 18mA continuous - directly drives 500Ω loads (e.g., 4–20mA loop with 250Ω shunt + wiring) without external buffers. |
| Common-Mode Input Range | Extends 44V above VEE - enables direct high-side voltage monitoring in 24V/48V systems without level-shifting. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and solar inverter monitoring. |
Pinout & Package
LT1636IMS8#PBF is housed in an 8-lead plastic MSOP (MS8) package, 3.0mm × 3.0mm × 1.1mm, with exposed pad connected to V– for thermal and noise performance. Pin 1 is marked by a dot or beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Null / NC | No internal connection; left unconnected per datasheet - not used for offset nulling (requires external pot between Pins 1 & 8). |
| 2 | Inverting Input (–IN) | Differential input node; accepts voltages up to 44V above VEE - critical for high-side current sensing. |
| 3 | Non-Inverting Input (+IN) | Differential input node; same Over-The-Top® range as Pin 2 - enables true differential high-voltage monitoring. |
| 4 | Negative Supply (V–) | Ground or negative rail; exposed pad internally tied to V– - must be soldered to PCB ground plane for thermal stability. |
| 5 | Shutdown (SHDN) | Active-high control: ≥1.2V above V– enables normal operation; ≤0.3V places output in high-Z and cuts IQ to 4µA. |
| 6 | Positive Supply (V+) | Positive rail input; supports up to 44V total supply - allows direct connection to 36V industrial bus rails. |
| 7 | Output (OUT) | Rail-to-rail sourcing/sinking output; drives 18mA and remains stable into 10,000pF with compensation network. |
| 8 | Null / NC | No internal connection; used only as wiper terminal for optional external offset-null potentiometer (10kΩ to V–). |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® Input Stage | Enables input operation 44V above VEE regardless of VCC - eliminates need for external level shifters in high-side sensing. |
| Rail-to-Rail I/O | Input common-mode range includes both rails; output swings within 10mV of V– and 50mV of V+ at 5mA - maximizes dynamic range in low-voltage systems. |
| Reverse Battery Protection | Draws <1nA at –27V supply - prevents damage and system reset during field-reverse battery installation in automotive modules. |
| Capacitive Load Drive | Stable into 10,000pF with 0.22µF + 150Ω RC network - supports long-cable transmission and EMI-filtered sensor interfaces without oscillation. |
| Input Fault Tolerance | Withstands –22V on inputs (via 1kΩ series resistors) - protects against sensor cable shorts or transients in harsh industrial environments. |
| Shutdown Mode | Reduces supply current to 4µA and output leakage to <1µA - enables ultra-low-power sleep states in battery-backed data loggers. |
Applications
| Battery Monitoring | High-Side Current Sensing |
|---|---|
|
Use Scenario: Monitoring individual cell voltage in 24V lithium-ion battery packs under charge/discharge, where cell voltage may exceed microcontroller ADC range. IC Role / Device Role / Timing Role: Precision buffer and level translator - accepts 0–4.2V cell voltage referenced to pack ground while operating from local 3.3V rail. Use Value: Eliminates isolated power supplies or op-amp-based level shifters; maintains <0.1% gain error over –40°C to 125°C. |
Use Scenario: Measuring motor phase current in industrial inverters using shunt resistors placed on high-side (positive rail) of H-bridge. IC Role / Device Role / Timing Role: Differential amplifier with Over-The-Top® inputs - rejects common-mode voltage up to 400V while amplifying mV-level shunt drops. Use Value: Enables single-chip current measurement without optocouplers or isolated amplifiers; supports fast transient response (<10µs settling). |
| MUX Amplifier Front-End | 4–20mA Transmitter |
|
Use Scenario: Multiplexing multiple thermocouple or RTD signals into a single ADC channel in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Low-power, rail-to-rail input/output amplifier - conditions each sensor signal before routing through analog switch array. Use Value: 50µA IQ allows 16-channel MUX design with <1mA total analog front-end current; shutdown pin disables unused channels. |
Use Scenario: Converting 0–5V process control signals to industry-standard 4–20mA current loops in field transmitters. IC Role / Device Role / Timing Role: Output driver and current-set amplifier - sources precise loop current while rejecting supply ripple and load variations. Use Value: 18mA output drive directly powers 250Ω load + 1km cable; PSRR >90dB ensures <0.01% current error from 12V supply noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail, micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1637IMS8#PBF | Higher precision: 75µV max VOS, 0.5µV/°C drift, but 75µA IQ and no Over-The-Top® input - requires level shifting for >V+ inputs. | Used where ultra-low offset dominates (e.g., precision weigh scales); unsuitable for high-side sensing above V+. | Select LT1637IMS8#PBF only when VOS <100µV is mandatory and input stays within rails; retain LT1636IMS8#PBF for Over-The-Top® capability. |
| ADA4505-2ARMZ | Lower IQ (10µA), wider temp range (–40°C to 125°C), but limited CMVR (to V+ – 1.2V) and 11MHz GBW - no 44V Over-The-Top® tolerance. | Suitable for low-power sensor buffers where inputs stay below V+, but cannot replace LT1636IMS8#PBF in high-side current sense. | Choose ADA4505-2ARMZ for ultra-low-power, rail-to-rail I/O where Over-The-Top® is unnecessary; LT1636IMS8#PBF remains required for >V+ input operation. |
Compared with LT1637IMS8#PBF and ADA4505-2ARMZ, the LT1636IMS8#PBF uniquely combines 44V Over-The-Top® input range, 50µA IQ, and 18mA drive - making it irreplaceable in high-side sensing and battery-monitoring designs where input voltage exceeds the supply rail.
Availability
LT1636IMS8#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor conditioning, and 4–20mA transmitter designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1636IMS8#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 production, qualification, and technical support for legacy Linear parts including the LT1636 family.
The LT1636 product line was designed specifically for high-voltage, micropower signal conditioning in harsh environments - targeting automotive battery monitoring, industrial current sensing, and solar panel string monitoring where inputs exceed the supply rail.
FAQ
What is the maximum input common-mode voltage for LT1636IMS8#PBF?
The LT1636IMS8#PBF supports an input common-mode voltage extending 44V above VEE, independent of VCC. For example, with VEE = 0V and VCC = 5V, inputs can safely operate up to +44V - a defining Over-The-Top® feature confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables for the IMS8 grade.
Does LT1636IMS8#PBF require external compensation for driving capacitive loads?
Yes - the LT1636IMS8#PBF is unity-gain stable into ≥200pF without compensation, but for loads >200pF (up to 10,000pF), a 0.22µF capacitor in series with a 150Ω resistor between OUT and GND is required. This network is explicitly specified in the datasheet's "Typical Applications" section and validated across temperature for the IMS8 package.
What is the guaranteed input offset voltage specification for LT1636IMS8#PBF?
For LT1636IMS8#PBF (I-grade, MS8 package), the input offset voltage is guaranteed at 700µV max over –40°C to +85°C, and 1050µV max over –40°C to +125°C. The 225µV value applies only at 0°C to +70°C per the Electrical Characteristics table - all values are measured and binned per Linear/Analog Devices' production test flow.
Can LT1636IMS8#PBF be used in reverse-battery protection circuits?
Yes - the LT1636IMS8#PBF is rated for reverse supply voltage up to –27V (with IS < –100µA), drawing less than 1nA in that condition. This is a tested, guaranteed specification per the Absolute Maximum Ratings table and is leveraged in automotive battery-sense modules where accidental reverse connection occurs during service.
What is the shutdown behavior of LT1636IMS8#PBF?
When Pin 5 (SHDN) is pulled ≤0.3V above VEE, the LT1636IMS8#PBF enters shutdown: supply current drops to 4µA typical, output becomes high-impedance, and output leakage remains <1µA. The shutdown pin tolerates up to +32V above VEE and supports controlled wake-up in low-power data acquisition systems.
LT1636IMS8#PBF 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:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.075V/µs
- Gain Bandwidth Product:
- 220 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 50µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LT1636IMS8#PBF FAQ
1.How can I place an order for LT1636IMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1636IMS8#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 LT1636IMS8#PBF reliable?
The price and inventory of LT1636IMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1636IMS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1636IMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1636IMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1636IMS8#PBF?
LT1636IMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1636IMS8#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 LT1636IMS8#PBF?
For technical support, including LT1636IMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1636IMS8#PBF requirements.
6.How does Aetrix verify that LT1636IMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1636IMS8#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 LT1636IMS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1636IMS8#PBF?
All LT1636IMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1636IMS8#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 LT1636IMS8#PBF part is unused and in its original packaging.
Return procedure for LT1636IMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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