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Analog Devices Inc. LT1636IN8#PBF
- Part No.:
- LT1636IN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1636IN8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,815
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Product details
Overview
LT1636IN8#PBF from Analog Devices (formerly Linear Technology) is a micropower rail-to-rail input/output operational amplifier with Over-The-Top® input stage, enabling operation with inputs 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 battery monitoring, sensor conditioning, and high-side current sensing where input common-mode range exceeds the positive rail.
For engineers reviewing the LT1636IN8#PBF datasheet, LT1636IN8#PBF pinout, LT1636IN8#PBF application, or LT1636IN8#PBF equivalent, key selection criteria include its 44V-over-VEE input capability, 50µA quiescent current, shutdown function reducing IQ to 4µA, rail-to-rail output swing, and reverse-battery protection to 27V - all in an 8-lead PDIP package.
Technical Context
The LT1636IN8#PBF employs a dual-input-stage architecture (PNP + NPN) enabling continuous high-impedance operation across its full 0V to 44V input common-mode range - independent of VCC. Its Over-The-Top® topology eliminates phase reversal for inputs 5V below VEE or 44V above VEE, and supports single-supply operation down to 2.7V total supply.
Internally compensated for stability into ≥200pF capacitive loads, it drives up to 10,000pF with external 0.22µF/150Ω compensation. Shutdown is activated by pulling SHDN ≥1.2V above VEE, reducing supply current to 4µA and output leakage to <1µA while preserving input bias current <0.1nA even at 44V over-VEE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 44V total - enables direct interface with 24V industrial rails and 36V automotive systems without level-shifting. |
| Input Common-Mode Range | 0V to 44V above VEE - supports true high-side sensing (e.g., battery + terminal monitoring) on any supply voltage. |
| Quiescent Current | 50µA typical - allows multi-year operation on coin cells in portable instrumentation and remote sensors. |
| Output Drive | ±18mA - sufficient to drive 10kΩ loads with rail-to-rail swing and maintain linearity into 4–20mA transmitter circuits. |
| Gain-Bandwidth Product | 220kHz - suitable for DC-coupled signal conditioning, precision current sensing, and slow-loop control feedback paths. |
| Input Offset Voltage | 225µV max (–40°C to 125°C) - ensures ≤1mV error in 4–20mA loop transmitters and battery voltage monitors with 12-bit ADCs. |
| CMRR | 110dB - rejects noise in high-impedance sensor bridges and shunt-based current measurement under noisy supply conditions. |
Pinout & Package
LT1636IN8#PBF is housed in an 8-lead narrow-body PDIP (N8) package with 0.300-inch width, through-hole mounting, and industry-standard pinout compatible with legacy op amp footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Null (NC) | No internal connection - left unconnected per datasheet; not used for offset nulling in this variant (offset null uses Pins 1 & 8 externally). |
| 2 | Inverting Input (–IN) | Differential input node; accepts signals up to 44V above VEE with no phase reversal or damage. |
| 3 | Non-Inverting Input (+IN) | Differential input node; identical Over-The-Top® tolerance as Pin 2, enabling high-side reference sensing. |
| 4 | Negative Supply (V–) | Ground or negative rail connection; substrate reference for internal protection diodes and shutdown logic. |
| 5 | Shutdown (SHDN) | Active-high enable: ≥1.2V above VEE disables output (high-Z) and reduces IQ to 4µA. |
| 6 | Output (OUT) | Rail-to-rail sourcing/sinking output capable of ±18mA; drives 10,000pF with external compensation network. |
| 7 | Positive Supply (V+) | Positive rail input; reverse-battery protected to 27V - draws <1nA if V+ is forced negative relative to V–. |
| 8 | Null (NC) | No internal connection - used only as second terminal for external 10kΩ offset-null potentiometer (wiper to V–). |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® Input Stage | Enables reliable high-side sensing without external level shifters - inputs operate 44V above VEE regardless of VCC, eliminating design risk in battery + monitoring. |
| Micropower Shutdown Mode | Reduces supply current to 4µA and output leakage to <1µA while maintaining input bias <0.1nA - ideal for wake-on-event sensor nodes. |
| Rail-to-Rail Input & Output | Full dynamic range utilization on 3V, 5V, or ±15V supplies - maximizes ADC resolution in low-voltage portable systems. |
| Reverse Battery Protection | Draws <1nA at –27V reverse supply - prevents system damage during field-replaceable battery insertion errors. |
| Capacitive Load Drive | Stable into 10,000pF with optional 0.22µF/150Ω compensation - supports long-line transmission and EMI-filtered sensor interfaces. |
Applications
| Battery Monitoring System | High-Side Current Sensing |
|---|---|
Use Scenario: Monitoring voltage of 24V lead-acid or LiFePO4 battery packs in solar charge controllers and UPS units. IC Role / Device Role / Timing Role: Precision buffer and level translator for battery + terminal, referenced to system ground. Use Value: Direct measurement without resistive dividers preserves accuracy; 225µV offset ensures <0.1% error at 24V full scale. | Use Scenario: Measuring load current via shunt resistor placed between power source and load (high-side configuration). IC Role / Device Role / Timing Role: Difference amplifier front-end with common-mode rejection of supply noise. Use Value: 44V-over-VEE input range accommodates 24V bus + shunt drop; 110dB CMRR suppresses PWM switching noise. |
| Sensor Signal Conditioning | 4–20mA Transmitter |
Use Scenario: Amplifying low-level outputs from bridge-based pressure or temperature sensors in industrial process equipment. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier stage with rail-to-rail output swing. Use Value: 50µA IQ enables always-on operation in loop-powered 2-wire sensors; 52nV/√Hz noise supports µV-level resolution. | Use Scenario: Converting DAC output or sensor voltage into standardized 4–20mA current loop for PLC interfacing. IC Role / Device Role / Timing Role: Voltage-to-current converter output driver with precise compliance and thermal stability. Use Value: ±18mA output drive meets 20mA loop requirement; 225µV offset contributes <0.1% FSR error in 16-bit systems. |
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 |
|---|---|---|---|
| LT1637IN8#PBF | Higher precision: 75µV max VOS, 1.5µV/°C drift, but 100µA IQ; same Over-The-Top® architecture and pinout. | Used where offset drift dominates error budget (e.g., precision thermocouple amplifiers), not ultra-low-power nodes. | Select LT1637IN8#PBF when VOS drift <1µV/°C is required and 2× quiescent current is acceptable. |
| ADA4522-1ARZ | Zero-drift architecture: 5µV max VOS, 0.005µV/°C drift, but 1.2mA IQ; no Over-The-Top® input - max VCM = V+ – 1.2V. | Used in high-accuracy DC-coupled instrumentation where input common-mode stays within rails (e.g., strain gauge bridges). | Select ADA4522-1ARZ only when input common-mode never exceeds V+ – 1.2V and sub-µV offset stability is critical. |
Compared with LT1636IN8#PBF, LT1637IN8#PBF trades 2× quiescent current for 3× lower offset drift, while ADA4522-1ARZ abandons Over-The-Top® capability entirely to achieve near-zero drift - making LT1636IN8#PBF uniquely suited for high-side sensing in battery-constrained systems.
Availability
LT1636IN8#PBF is available at Aetrix Electronics and suitable for battery monitoring, sensor conditioning, and 4–20mA transmitter designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1636IN8#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 its precision analog portfolio, emphasizing high-performance, low-power, and robust industrial-grade signal conditioning ICs.
The LT1636 family was designed specifically for high-reliability sensing in harsh environments - supporting rail-to-rail operation, extreme common-mode voltage tolerance, and wide-temperature functionality in battery-powered and industrial control systems.
FAQ
What is the maximum input common-mode voltage for LT1636IN8#PBF?
The LT1636IN8#PBF supports an input common-mode voltage range extending up to 44V above VEE, independent of VCC. This Over-The-Top® capability allows direct connection to high-side nodes such as battery positive terminals or 24V bus lines without external level-shifting circuitry. The specification is guaranteed across the full –40°C to 125°C operating temperature range.
Does LT1636IN8#PBF support rail-to-rail output swing?
Yes, LT1636IN8#PBF provides true rail-to-rail output swing: on a 5V supply, it delivers 4.95V high and 10mV low with no load, and sustains ≥4.3V high and ≤875mV low while sourcing/sinking 10mA. This enables full utilization of ADC input ranges and simplifies interface design in low-voltage systems.
How does the shutdown function work on LT1636IN8#PBF?
The LT1636IN8#PBF shutdown pin (Pin 5) activates when pulled ≥1.2V above VEE, placing the output in high-impedance state and reducing quiescent current from 50µA to 4µA. Output leakage remains <1µA, and input bias current stays <0.1nA - preserving accuracy in high-impedance sensor networks during sleep mode.
Can LT1636IN8#PBF drive large capacitive loads?
Yes, LT1636IN8#PBF is internally compensated for ≥200pF and can drive up to 10,000pF using an external 0.22µF capacitor in series with a 150Ω resistor from output to ground. This configuration maintains stability across temperature and load variations, supporting EMI filtering and long-cable sensor interfaces without oscillation.
What is the reverse battery protection rating for LT1636IN8#PBF?
LT1636IN8#PBF provides reverse battery protection up to –27V on the V+ pin, drawing less than 1nA supply current under fault conditions. This protects downstream circuitry during incorrect battery installation in field-deployed equipment such as portable test instruments and remote monitoring nodes.
LT1636IN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Over-The-Top®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1636IN8#PBF FAQ
1.How can I place an order for LT1636IN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1636IN8#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 LT1636IN8#PBF reliable?
The price and inventory of LT1636IN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1636IN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1636IN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1636IN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1636IN8#PBF?
LT1636IN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1636IN8#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 LT1636IN8#PBF?
For technical support, including LT1636IN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1636IN8#PBF requirements.
6.How does Aetrix verify that LT1636IN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1636IN8#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 LT1636IN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1636IN8#PBF?
All LT1636IN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1636IN8#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 LT1636IN8#PBF part is unused and in its original packaging.
Return procedure for LT1636IN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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