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Analog Devices Inc. LT1636IS8#PBF
- Part No.:
- LT1636IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1636IS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:515
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Product details
Overview
LT1636IS8#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, independent of VCC. It delivers 18mA output drive, 225µV max input offset voltage, 220kHz gain-bandwidth product, and operates from 2.7V to 44V supply with only 50µA quiescent current - ideal for high-voltage sensor conditioning in battery-powered industrial monitoring systems.
For engineers reviewing the LT1636IS8#PBF datasheet, LT1636IS8#PBF pinout, LT1636IS8#PBF application, or LT1636IS8#PBF equivalent, key selection criteria include its 44V over-the-top input range, shutdown capability reducing IQ to 4µA, reverse-battery protection to 27V, rail-to-rail output swing, and guaranteed performance across –40°C to 125°C.
Technical Context
The LT1636IS8#PBF employs a dual-input-stage architecture (PNP + NPN) enabling seamless operation when inputs exceed V+, with no phase reversal for inputs from 5V below VEE to 44V above VEE. Its Over-The-Top® topology maintains high input impedance across the full extended common-mode range.
Internally compensated for stability into ≥200pF capacitive loads, it supports optional 0.22µF + 150Ω output compensation to drive up to 10,000pF. Shutdown is activated by pulling SHDN ≥1.2V above VEE, placing output in high-impedance state while reducing supply current to ≤4µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 44V total - supports single-supply industrial sensing and wide-range battery/solar inputs. |
| Quiescent Current | 50µA typical - enables multi-year operation in energy-constrained portable instrumentation. |
| Input Offset Voltage | 225µV max (–40°C to 85°C) - ensures precision DC signal amplification without calibration. |
| Gain-Bandwidth Product | 220kHz - sufficient for low-frequency sensor interfaces, supply current monitoring, and 4–20mA loop drivers. |
| Output Drive | ±18mA - drives heavy resistive loads or 10kΩ+ feedback networks without gain error. |
| Common-Mode Input Range | Extends 44V above VEE, independent of VCC - enables direct high-side current sensing in 24V/48V systems. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, industrial control, and harsh-environment applications. |
Pinout & Package
LT1636IS8#PBF is housed in an 8-lead plastic SO package (S8), with exposed pad connected to V– for thermal and noise performance. Pin 1 is marked with a dot or notch; device is lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NULL) | No-connect terminal | Internally unused; must be left floating or tied to V– per layout guidelines. |
| 2 (–IN) | Inverting input | Differential input node; supports rail-to-rail common-mode range including >V+. |
| 3 (+IN) | Non-inverting input | Differential input node; identical Over-The-Top® voltage tolerance as –IN. |
| 4 (V–) | Negative supply | Reference for all internal circuitry; underside metal pad connects here for thermal dissipation. |
| 5 (NULL) | No-connect terminal | Internally unused; must be left floating or tied to V–. |
| 6 (V+) | Positive supply | Accepts up to 44V; requires local 0.01µF bypass capacitor within 25mm. |
| 7 (OUT) | Amplifier output | Rail-to-rail swing; capable of sourcing/sinking 18mA; supports 10,000pF load with compensation. |
| 8 (SHDN) | Shutdown control | Active-high: ≥1.2V above V– disables output and reduces IQ to ≤4µA; tolerates up to 32V above V–. |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® Input Stage | Enables input voltages up to 44V above VEE regardless of VCC - eliminates level-shifting in high-side current sensing. |
| Reverse Battery Protection | Draws <1nA at –27V supply - safeguards circuits in automotive and field-deployed equipment during polarity reversal. |
| Output Shutdown | Reduces supply current to ≤4µA and places output in high-Z state - critical for power-gated sensor nodes. |
| Rail-to-Rail I/O | Swings within 10mV of both rails at light loads - maximizes dynamic range in low-voltage single-supply systems. |
| Capacitive Load Drive | Stable into 10,000pF with external 0.22µF + 150Ω network - supports long-line transmission and piezoelectric sensor interfacing. |
Applications
| High-Side Current Sensing | Battery Monitoring System |
|---|---|
Use Scenario: Measuring load current in 24V/48V industrial power rails using a shunt resistor placed between source and load. IC Role / Device Role / Timing Role: Precision differential amplifier configured as current-sense amplifier with Over-The-Top® inputs referenced to high-side potential. Use Value: Eliminates need for isolated amplifiers or level shifters; achieves <1% gain error with 225µV VOS and 110dB CMRR. | Use Scenario: Monitoring cell voltage and pack current in lithium-ion battery management systems operating across –20°C to 70°C ambient. IC Role / Device Role / Timing Role: Low-power analog front-end amplifier for voltage scaling, current sense, and temperature interface signals. Use Value: 50µA IQ extends standby life; 125°C rating supports operation near hot cells; reverse-battery tolerance prevents damage during service. |
| 4–20mA Transmitter | MUX Amplifier for Sensor Arrays |
Use Scenario: Converting process sensor outputs (e.g., pressure, temperature) into industry-standard 4–20mA current loops for PLC interfacing. IC Role / Device Role / Timing Role: Output stage op-amp in two-wire transmitter design, driving loop current with rail-to-rail compliance. Use Value: ±18mA output drive ensures full 20mA compliance even with 25V loop drop; shutdown mode enables remote diagnostics. | Use Scenario: Multiplexing and amplifying outputs from multiple RTDs, thermocouples, or strain gauges in portable test equipment. IC Role / Device Role / Timing Role: Channel-selectable gain stage with fast turn-on/off (2.5µs tOFF) synchronized to MUX timing. Use Value: Low 50µA IQ minimizes self-heating in precision sensor paths; shutdown isolates inactive channels to prevent crosstalk. |
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#PBF | Higher precision: 65µV max VOS, 1.2µV/°C drift; same Over-The-Top® architecture and 125°C rating. | Better suited for ultra-low-drift applications like precision weigh scales or medical sensor front-ends. | Select LT1637IS8#PBF when VOS drift and long-term stability outweigh micropower requirements. |
| ADA4522-1ARZ | Zero-drift architecture: 5µV max VOS, 0.005µV/°C drift; but lacks Over-The-Top® input (CMR = ±13.2V max) and 125°C rating. | Limited to low-voltage, high-accuracy applications where input exceeds supply is not required. | Choose ADA4522-1ARZ only for sub-20V systems demanding nanovolt-level DC precision without high-side sensing. |
Compared with LT1637IS8#PBF and ADA4522-1ARZ, LT1636IS8#PBF uniquely balances micropower operation (50µA), extended input range (44V above VEE), and 125°C qualification - making it the optimal choice for ruggedized, high-voltage industrial sensing where power and voltage range dominate over ultra-low drift.
Availability
LT1636IS8#PBF is available at Aetrix Electronics and suitable for high-reliability industrial control, battery-powered instrumentation, and automotive subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1636IS8#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, inheriting its legacy of high-performance analog ICs for precision signal conditioning, power management, and interface applications.
The LT1636 product line was designed specifically for high-voltage, low-power industrial sensing - addressing needs in current monitoring, battery management, and ruggedized transmitters where inputs exceed the positive supply rail.
FAQ
What is the maximum common-mode input voltage for LT1636IS8#PBF?
The LT1636IS8#PBF supports a common-mode input voltage extending up to 44V above VEE, independent of VCC. This Over-The-Top® capability allows direct connection to high-side shunts in 24V/48V systems without level shifting. The specification is guaranteed across the full –40°C to 125°C operating range and applies to both input pins.
Does LT1636IS8#PBF require external compensation for capacitive loads?
LT1636IS8#PBF is internally compensated for stability into ≥200pF. For capacitive loads exceeding 200pF - such as long cables or piezoelectric sensors - a 0.22µF capacitor in series with a 150Ω resistor between OUT and ground is required. This network enables stable operation with loads up to 10,000pF, as verified in the LT1636IS8#PBF datasheet Figure 12.
What is the shutdown behavior of LT1636IS8#PBF?
When the SHDN pin is driven ≥1.2V above VEE, LT1636IS8#PBF disables its output (high-impedance state) and reduces quiescent current to ≤4µA. Input bias current drops below 0.1nA, and output leakage remains <1µA. The device resumes normal operation within 120µs after SHDN returns low, as specified in the LT1636IS8#PBF electrical characteristics table.
Is LT1636IS8#PBF suitable for reverse-battery protection applications?
Yes - LT1636IS8#PBF provides inherent reverse-battery protection up to –27V. During reverse supply conditions, supply current remains below 1nA, preventing damage to downstream circuitry. This feature is validated across the full –40°C to 125°C temperature range and is explicitly documented in the Absolute Maximum Ratings and Applications Information sections of the LT1636IS8#PBF datasheet.
What package type does LT1636IS8#PBF use, and what are its thermal considerations?
LT1636IS8#PBF uses an 8-lead plastic SO (S8) package with JEDEC MS-012AC standard footprint. Its underside metal pad is internally connected to V–, serving as a thermal path. With θJA = 190°C/W, proper PCB copper area under the pad is recommended for applications operating near maximum junction temperature (150°C), especially at elevated ambient temperatures or high output currents.
LT1636IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Over-The-Top®
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SO
LT1636IS8#PBF FAQ
1.How can I place an order for LT1636IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1636IS8#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 LT1636IS8#PBF reliable?
The price and inventory of LT1636IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1636IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1636IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1636IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1636IS8#PBF?
LT1636IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1636IS8#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 LT1636IS8#PBF?
For technical support, including LT1636IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1636IS8#PBF requirements.
6.How does Aetrix verify that LT1636IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1636IS8#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 LT1636IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1636IS8#PBF?
All LT1636IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1636IS8#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 LT1636IS8#PBF part is unused and in its original packaging.
Return procedure for LT1636IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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