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Analog Devices Inc. LT1636CMS8#TRPBF
- Part No.:
- LT1636CMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT1636CMS8#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,593
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Product details
Overview
LT1636CMS8#TRPBF 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, independent of VCC. It delivers 18mA output drive, 225µV max input offset voltage (0°C–70°C), 220kHz gain-bandwidth product, and operates from 2.7V to 44V total supply. It is used in battery monitoring, sensor conditioning, and high-side current sensing where input voltages exceed the positive rail.
For engineers reviewing the LT1636CMS8#TRPBF datasheet, LT1636CMS8#TRPBF pinout, LT1636CMS8#TRPBF application, or LT1636CMS8#TRPBF equivalent, key selection criteria include its 44V over-the-top input range, 50µA quiescent current, shutdown capability reducing IQ to 4µA, reverse-battery protection to 27V, and MS8 package compatibility with space-constrained industrial and automotive signal chains.
Technical Context
The LT1636CMS8#TRPBF employs a dual-input-stage architecture (PNP + NPN) that maintains high impedance and linear operation even when inputs exceed V+, enabling true high-side sensing without external level-shifting. Its Over-The-Top® input stage allows common-mode voltages from VEE to VEE + 44V on single or split supplies - verified across –40°C to 125°C for the H-grade, though this MS8 variant is C-grade (–40°C to 85°C).
Internally compensated for unity-gain stability into capacitive loads up to 10,000pF (with optional 0.22µF + 150Ω network), it avoids phase reversal for inputs 5V below VEE or 44V above VEE. Shutdown control via Pin 5 reduces supply current to ≤4µA while maintaining high-impedance output and sub-0.1nA input bias current - critical for low-power wake-up circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 44V total - supports wide-input industrial sensors and 24V/36V battery systems without external regulators. |
| Quiescent Current | 50µA typical - enables multi-year operation in coin-cell-powered instrumentation and remote monitors. |
| Input Offset Voltage | 225µV max (0°C–70°C) - ensures <0.5% error in precision 3V/5V sensor bridges and shunt-based current measurement. |
| Gain-Bandwidth Product | 220kHz - sufficient for DC–10kHz signal conditioning in temperature, pressure, and strain gauge interfaces. |
| Output Drive | 18mA rail-to-rail - directly drives 10kΩ loads or 10,000pF cables with compensation, eliminating buffer stages. |
| Common-Mode Input Range | VEE to VEE + 44V - enables direct connection to 48V bus monitoring, solar panel string sensing, and high-side current sense amplifiers. |
| Shutdown Current | 4µA max - reduces system standby power by >90% versus active mode, ideal for duty-cycled data loggers. |
Pinout & Package
LT1636CMS8#TRPBF is housed in an 8-lead MSOP (MS8) package: 3.0mm × 3.0mm × 1.1mm body, 0.65mm pitch, exposed pad connected to V– for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4 | Null / No Connect | Unused pins; must be left floating or tied to V– per layout guidelines - no internal connection. |
| 2 | Inverting Input (–IN) | Differential input node; accepts signals up to VEE + 44V - enables high-side current sensing without level shifters. |
| 3 | Non-Inverting Input (+IN) | Differential input node; same Over-The-Top® range as –IN - supports rail-independent reference monitoring. |
| 5 | Shutdown (SHDN) | Active-high enable: ≥1.2V above V– activates; ≤0.3V disables - provides clean, low-leakage sleep mode control. |
| 6 | Output (OUT) | Rail-to-rail sourcing/sinking output; drives 18mA and remains stable into 10,000pF with external compensation. |
| 7 | Positive Supply (V+) | Primary supply pin; bypass with 0.01µF ceramic near pin - required for stability at high supply voltages (>20V). |
| 8 | Negative Supply (V–) | Ground or negative rail; exposed pad internally connected - must be soldered to PCB ground plane for thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® Input Stage | Enables input operation 44V above VEE regardless of VCC - eliminates need for external high-voltage translators in battery management ICs. |
| Rail-to-Rail Input & Output | Full dynamic range utilization from VEE to V+ - maximizes SNR in low-supply (3V/5V) portable instrumentation. |
| Reverse Battery Protection | Draws <1nA at –27V reverse supply - prevents damage and leakage in automotive and solar applications with accidental polarity reversal. |
| Capacitive Load Drive | Stable into 10,000pF with 0.22µF + 150Ω compensation - supports long-line sensor interfacing without oscillation or overshoot. |
| Input Fault Protection | Internal 1kΩ series resistors + clamp diodes protect against faults down to VEE – 22V - enhances robustness in industrial I/O modules. |
Applications
| Battery Monitoring | High-Side Current Sensing |
|---|---|
Use Scenario: Real-time voltage tracking of 12V–48V lead-acid or Li-ion battery strings in UPS and EV auxiliary systems. IC Role / Device Role / Timing Role: Precision buffer and level-shifted monitor for cell or pack voltage, referenced to system ground. Use Value: Direct interface to 44V-above-ground nodes eliminates isolated ADC or optocoupler requirements, reducing BOM cost by ~30%. | Use Scenario: Accurate current measurement in motor drivers, power supplies, and industrial PLC outputs using shunt resistors on high-side rails. IC Role / Device Role / Timing Role: Differential amplifier with extended common-mode range, rejecting supply noise while amplifying mV-level shunt drops. Use Value: 225µV offset ensures <1% error at 100mV shunt drop; 18mA drive supports direct connection to ADC input RC filters. |
| Sensor Signal Conditioning | MUX Amplifier Front-End |
Use Scenario: Low-power amplification of millivolt-output RTDs, thermocouples, and bridge sensors in wireless sensor nodes. IC Role / Device Role / Timing Role: Rail-to-rail input/output op-amp providing gain, filtering, and buffering before SAR ADC sampling. Use Value: 50µA IQ enables multi-sensor arrays with microcontroller-controlled duty cycling; 220kHz GBW supports 10kHz anti-aliasing. | Use Scenario: Multiplexed analog front-end for multi-channel data acquisition in portable test equipment and medical devices. IC Role / Device Role / Timing Role: Fast-settling, low-offset amplifier driving multiplexer output to shared ADC channel. Use Value: Shutdown pin (Pin 5) enables per-channel power gating - cuts system idle current by >85% versus always-on topology. |
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#TRPBF | Higher precision: 100µV max VOS, 0.5µV/°C drift; same Over-The-Top® range and 50µA IQ. | Required for <0.1% accuracy in precision current sensing or strain gauge bridges. | Select when offset drift or initial accuracy dominates system error budget - same footprint and pinout. |
| ADA4522-1ARMZ | Zero-drift architecture: 5µV max VOS, 0.005µV/°C drift; but no Over-The-Top® input - max VCM = V+ – 0.1V. | Suitable only for conventional low-side sensing or mid-supply referenced sensors. | Choose for ultra-low drift in battery-powered instrumentation where input stays within rails - requires layout change due to different pinout. |
Compared with LT1636CMS8#TRPBF, LT1637IMS8#TRPBF offers tighter DC accuracy without sacrificing Over-The-Top® capability, while ADA4522-1ARMZ trades high-side sensing for nanovolt-level stability - making the LT1636CMS8#TRPBF optimal for cost-sensitive, high-common-mode industrial monitoring where ±0.25mV offset is acceptable.
Availability
LT1636CMS8#TRPBF is available at Aetrix Electronics and suitable for battery monitoring, sensor conditioning, high-side current sensing, and MUX amplifier front-ends requiring stable component supply across automotive, industrial, and energy infrastructure programs.
Supply support for LT1636CMS8#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 support for legacy Linear op amps including the LT1636 family.
The LT1636 product line was designed for high-reliability signal conditioning in harsh environments - specifically targeting applications demanding wide supply range, rail-to-rail operation, and fault-tolerant input architecture.
FAQ
What is the maximum common-mode input voltage for LT1636CMS8#TRPBF?
The LT1636CMS8#TRPBF supports a common-mode input voltage range from VEE to VEE + 44V, independent of VCC. This Over-The-Top® capability allows direct connection to signals exceeding the positive supply rail - confirmed for the MS8 package across –40°C to 85°C. At 5V supply, inputs may safely reach +49V referenced to VEE.
Does LT1636CMS8#TRPBF require external compensation for capacitive loads?
Yes - the LT1636CMS8#TRPBF is unity-gain stable into ≤200pF without external components. 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 validated in the LT1636CMS8#TRPBF datasheet for stability under all output current conditions.
What is the shutdown behavior of LT1636CMS8#TRPBF?
When the SHDN pin (Pin 5) is pulled ≥1.2V above VEE, the LT1636CMS8#TRPBF enters shutdown: supply current drops to ≤4µA, output becomes high-impedance, and input bias current falls below 0.1nA - even with inputs at VEE + 44V. Turn-off time is 2.5µs; turn-on time is 120µs, both measured with 10kΩ load.
Can LT1636CMS8#TRPBF operate on a single 3V supply?
Yes - the LT1636CMS8#TRPBF is fully specified for 3V single-supply operation (V+ = 3V, V– = 0V), delivering rail-to-rail input and output swing, 225µV max input offset, and 220kHz gain-bandwidth. Its minimum supply voltage is 2.7V, making it compatible with Li-ion and coin-cell powered systems.
Is LT1636CMS8#TRPBF protected against reverse battery connection?
Yes - the LT1636CMS8#TRPBF features reverse battery protection up to –27V on V+, drawing <1nA supply current during fault conditions. This is achieved via internal circuitry that blocks conduction paths, ensuring no damage or system upset in automotive or portable equipment subjected to accidental polarity reversal.
LT1636CMS8#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:
- 0.075V/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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LT1636CMS8#TRPBF FAQ
1.How can I place an order for LT1636CMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1636CMS8#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 LT1636CMS8#TRPBF reliable?
The price and inventory of LT1636CMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1636CMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1636CMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1636CMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1636CMS8#TRPBF?
LT1636CMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1636CMS8#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 LT1636CMS8#TRPBF?
For technical support, including LT1636CMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1636CMS8#TRPBF requirements.
6.How does Aetrix verify that LT1636CMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1636CMS8#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 LT1636CMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1636CMS8#TRPBF?
All LT1636CMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1636CMS8#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 LT1636CMS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1636CMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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