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Analog Devices Inc. LT1636IS8#TRPBF
- Part No.:
- LT1636IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1636IS8#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,211
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Product details
Overview
LT1636IS8#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 on supplies as low as 2.7V. It delivers 18mA output drive, 225µV max input offset voltage, 220kHz gain-bandwidth product, and operates across –40°C to 125°C. It is used in high-voltage sensor conditioning and battery monitoring where input signals exceed the positive rail.
For engineers reviewing the LT1636IS8#TRPBF datasheet, LT1636IS8#TRPBF pinout, LT1636IS8#TRPBF application, or LT1636IS8#TRPBF equivalent, key selection criteria include its 44V over-the-top input range, 4µA shutdown current, reverse battery protection to 27V, rail-to-rail output swing, and SO-8 package compatibility with space-constrained industrial sensing designs.
Technical Context
The LT1636IS8#TRPBF employs a dual-input-stage architecture (PNP + NPN) that maintains high-impedance operation and no phase reversal when inputs exceed V+, even on 3V supplies. Its Over-The-Top® topology allows differential and common-mode input voltages up to 44V independent of VCC, with built-in 1kΩ series resistors and clamp diodes for ±22V fault protection below VEE.
It features internal compensation for unity-gain stability into capacitive loads up to 10,000pF using an external 0.22µF/150Ω network, and supports shutdown via SHDN pin (active-high, 32V tolerant), reducing quiescent current to 4µA while maintaining <1µA output leakage and <0.1nA input bias current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 44V total - enables single-supply operation in 24V industrial systems and high-side sensing on 36V battery rails. |
| Quiescent Current | 50µA typical - supports multi-year battery life in portable instrumentation and remote sensor nodes. |
| Input Offset Voltage | 225µV max (–40°C to 85°C) - ensures sub-mV error in precision current-sense and bridge amplifier applications. |
| Gain-Bandwidth Product | 220kHz - sufficient for DC–10kHz signal conditioning in strain gauge, thermocouple, and RTD interfaces. |
| Output Drive | 18mA - directly drives 500Ω loads or 4–20mA transmitter circuits without external buffers. |
| Common-Mode Input Range | Extends 44V above VEE - allows direct connection to high-side shunt monitors in automotive and solar MPPT systems. |
| Shutdown Current | 4µA - enables ultra-low-power sleep modes in always-on monitoring systems. |
| CMRR | 110dB - rejects noise in noisy industrial environments with large ground potential differences. |
Pinout & Package
LT1636IS8#TRPBF is housed in an 8-lead plastic SO (Small Outline) package (S8), with exposed pad not connected internally. Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant and moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NULL) | No-connect terminal | Internally unused; must be left floating or tied to GND per layout best practice - no electrical function. |
| 2 (–IN) | Inverting input | Differential input node; high-impedance (≥7MΩ) and Over-The-Top® capable - accepts voltages up to 44V above VEE. |
| 3 (+IN) | Non-inverting input | Differential input node; identical Over-The-Top® capability and protection as Pin 2. |
| 4 (V–) | Negative supply rail | Reference for all internal circuitry; underside metal pad (in SO-8) is electrically connected to V–. |
| 5 (NULL) | No-connect terminal | Internally unused; must be left floating - no thermal or electrical role. |
| 6 (V+) | Positive supply rail | Accepts up to 44V; requires local 0.01µF bypass capacitor within 25mm for stability under load transients. |
| 7 (OUT) | Amplifier output | Rail-to-rail swing (within 10mV of rails); drives 18mA; stable into 10,000pF with external RC compensation. |
| 8 (SHDN) | Shutdown control | Active-high enable; pulls output to high-Z and reduces IQ to 4µA when ≥1.2V above V–; tolerates up to 32V above V–. |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® input stage | Enables reliable high-side current sensing without level-shifting, even when input exceeds V+ by 44V - eliminates external op-amp or comparator bias networks. |
| Rail-to-rail I/O | Delivers full dynamic range from V– to V+ at both input and output - maximizes SNR in low-voltage (3V) battery-powered systems. |
| Reverse battery protection | Draws <1nA at –27V supply - prevents damage and system reset during field-replacement errors in automotive and portable equipment. |
| Output shutdown | Reduces system standby power by >90% (from 50µA to 4µA) while preserving input bias integrity - critical for energy-harvesting sensor nodes. |
| Capacitive load drive | Stable into 10,000pF with optional 0.22µF/150Ω network - supports long-cable interfacing and EMI-filtered outputs without oscillation. |
| High voltage gain | 2000V/mV (126dB) - enables precise low-level signal amplification (e.g., µV thermocouple outputs) with minimal external gain stages. |
Applications
| Battery Monitoring | High-Side Current Sensing |
|---|---|
Use Scenario: Monitoring individual cell voltage in 24V Li-ion battery packs with isolated microcontroller interface. IC Role / Device Role / Timing Role: Precision buffer and level translator for cell voltage measurement, rejecting pack ground noise. Use Value: Direct connection to cells up to 36V without external level shifters; 225µV offset ensures ≤0.1% voltage error at 3.6V full scale. | Use Scenario: Measuring motor phase current in industrial inverters using high-side shunt resistors. IC Role / Device Role / Timing Role: High-common-mode differential amplifier front-end for isolated ADC input. Use Value: 44V over-the-top range accommodates 400V bus transients; rail-to-rail output matches 0–5V ADC reference. |
| MUX Amplifier Interface | Solar Panel MPPT Circuit |
Use Scenario: Signal conditioning for multiplexed temperature and pressure sensors in HVAC controllers. IC Role / Device Role / Timing Role: Low-power, fast-settling amplifier driving analog MUX inputs to reduce channel crosstalk. Use Value: 220kHz GBW and 120µs turn-on time enable accurate sampling of 10-channel sensor arrays at 1ksps. | Use Scenario: Voltage and current feedback in photovoltaic string optimizers operating at up to 1000V DC. IC Role / Device Role / Timing Role: High-voltage sense amplifier feeding MPPT controller's error amplifier. Use Value: Reverse battery protection prevents latch-up during panel reconfiguration; 125°C rating supports rooftop ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1637IS8#TRPBF | Higher precision: 75µV max VOS, 1.5µV/°C drift; same Over-The-Top® architecture and SO-8 package. | Targeted at metrology-grade current sensing where sub-100µV offset is mandatory. | Select LT1637IS8#TRPBF only if VOS budget is ≤100µV and cost premium is acceptable. |
| ADA4522-1ARZ | Zero-drift architecture; 5µV max VOS, 0.005µV/°C drift; but no Over-The-Top® input - max VCM = V+ – 1.2V. | Suitable for low-frequency precision instrumentation where input stays within supply rails. | Choose ADA4522-1ARZ for ultra-low drift in lab equipment; avoid for high-side sensing beyond V+. |
Compared with LT1636IS8#TRPBF, LT1637IS8#TRPBF offers tighter offset specs at higher cost, while ADA4522-1ARZ provides near-zero drift but lacks over-the-rail capability - making LT1636IS8#TRPBF the only choice for true high-side sensing in harsh industrial environments.
Availability
LT1636IS8#TRPBF is available at Aetrix Electronics and suitable for battery monitoring, high-side current sensing, MUX amplifier interfaces, and solar MPPT circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1636IS8#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 precision, high-voltage, low-power signal conditioning in industrial, automotive, and energy infrastructure applications where inputs exceed supply rails.
FAQ
What is the maximum common-mode input voltage for LT1636IS8#TRPBF?
The LT1636IS8#TRPBF supports a common-mode input voltage extending 44V above VEE, independent of VCC. This Over-The-Top® capability allows direct connection to high-side shunts or battery terminals exceeding the positive supply rail - verified across –40°C to 125°C and confirmed in Absolute Maximum Ratings and Electrical Characteristics tables.
Does LT1636IS8#TRPBF require external compensation for capacitive loads?
Yes, the LT1636IS8#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 specified in the datasheet for stable operation with long cables or EMI filters.
What is the shutdown behavior of LT1636IS8#TRPBF?
When the SHDN pin is driven ≥1.2V above VEE, the LT1636IS8#TRPBF disables the output (high-impedance state) and reduces quiescent current to 4µA. Input bias current drops to <0.1nA, and output leakage remains <1µA - enabling true zero-power sleep modes in battery-operated systems without compromising input integrity.
Can LT1636IS8#TRPBF operate on a 3V single supply?
Yes, the LT1636IS8#TRPBF is fully specified and characterized for 3V single-supply operation (3V/0V), including rail-to-rail input/output swing, 225µV max VOS, and 220kHz GBW. Its minimum supply voltage is 2.7V, making it suitable for coin-cell and energy-harvesting applications where headroom is constrained.
Is LT1636IS8#TRPBF pin-compatible with other LT1636 variants?
Yes, LT1636IS8#TRPBF shares identical pinout and footprint with all S8-package LT1636 variants (e.g., LT1636CS8, LT1636HS8). The 'I' grade denotes –40°C to 125°C operation, and all S8 versions use the same SO-8 outline, thermal pad connection (to V–), and null pin assignments - enabling drop-in replacement within temperature-grade requirements.
LT1636IS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Over-The-Top®
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1636IS8#TRPBF FAQ
1.How can I place an order for LT1636IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1636IS8#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 LT1636IS8#TRPBF reliable?
The price and inventory of LT1636IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1636IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1636IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1636IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1636IS8#TRPBF?
LT1636IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1636IS8#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 LT1636IS8#TRPBF?
For technical support, including LT1636IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1636IS8#TRPBF requirements.
6.How does Aetrix verify that LT1636IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1636IS8#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 LT1636IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1636IS8#TRPBF?
All LT1636IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1636IS8#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 LT1636IS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1636IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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