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Analog Devices Inc. LT1639HS#TRPBF
- Part No.:
- LT1639HS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1639HS#TRPBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,741
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Product details
Overview
LT1639HS#TRPBF from Analog Devices (formerly Linear Technology) is a quad rail-to-rail input and output operational amplifier with Over-The-Top® capability, enabling operation with inputs up to 44V above V– or above V+. It delivers 1.2MHz gain bandwidth, 0.4V/µs slew rate, and 25mA output drive per channel at 170μA quiescent current per amplifier, supporting single-supply battery monitoring and sensor conditioning in industrial systems operating from –40°C to 125°C.
For engineers reviewing the LT1639HS#TRPBF datasheet, LT1639HS#TRPBF pinout, LT1639HS#TRPBF application, or LT1639HS#TRPBF equivalent, key selection criteria include its reverse-battery protection to 18V, rail-to-rail I/O swing, ±15V or 3V–44V total supply range, and guaranteed high-temperature performance up to 125°C in SO-14 package.
Technical Context
The LT1639HS#TRPBF integrates dual NPN/PNP input stages enabling Over-The-Top operation - inputs remain functional even when biased above V+ - with phase reversal protection and internal 1kΩ series input resistors for fault tolerance. Its architecture supports stable unity-gain operation and drives ≥200pF capacitive loads without external compensation.
It features reverse battery protection drawing <1nA under –18V reverse supply, operates on total supplies from 2.7V to 44V, and maintains rail-to-rail output swing (within 20mV of V+, 3mV of V–) while sourcing/sinking ≥25mA per channel at 5V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 1.2MHz typical - enables stable closed-loop gain up to 12 at 100kHz for precision signal conditioning. |
| Slew Rate | 0.4V/µs typical - supports 100kHz full-power bandwidth for 1V output swing without distortion. |
| Supply Current per Amp | 170μA typical - allows four-channel operation at <680μA total, ideal for micropower battery systems. |
| Input Voltage Range | 0.3V to 44V common-mode - permits direct sensing of 44V rails with no level-shifting circuitry. |
| Output Drive | 25mA minimum per channel - drives 2kΩ loads to rail with <10mV error, suitable for active filter and transmitter interfaces. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive and industrial control environments. |
| CMRR | 76dB minimum - rejects supply noise and common-mode interference in noisy industrial settings. |
Pinout & Package
LT1639HS#TRPBF is housed in a 14-lead plastic SOIC (SO-14) package with exposed pad thermally connected to V–, measuring 8.65mm × 3.90mm × 1.75mm, JEDEC MS-012AC compliant, rated for θJA = 160°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Rail-to-rail output capable of sourcing/sinking ≥25mA; connects directly to load or feedback network. |
| 2 (–IN A) | Inverting input A | Differential input node with 1kΩ series resistor; accepts voltages up to 44V above V– regardless of supply. |
| 3 (+IN A) | Non-inverting input A | Differential input node with 1kΩ series resistor; supports Over-The-Top operation above V+. |
| 4 (V–) | Negative supply | Power ground reference; underside metal pad internally bonded to this pin for thermal dissipation. |
| 5 (+IN B) | Non-inverting input B | Independent input for second amplifier; shares same Over-The-Top and phase-reversal protection as Pin 3. |
| 6 (–IN B) | Inverting input B | Independent input for second amplifier; identical electrical behavior to Pin 2. |
| 7 (OUT B) | Amplifier B output | Identical output capability to Pin 1; fully independent channel with no crosstalk beyond specified 80dB. |
| 8 (V+) | Positive supply | Bypass with 0.1μF capacitor within 25mm; supports reverse-battery protection up to –18V. |
| 9 (OUT C) | Amplifier C output | Third rail-to-rail output; matches Pins 1 and 7 in drive strength and voltage swing specs. |
| 10 (–IN C) | Inverting input C | Third differential input; validated for 44V common-mode range and phase reversal immunity. |
| 11 (+IN C) | Non-inverting input C | Third high-voltage input node; functions identically to Pins 3 and 5 across full temperature range. |
| 12 (V–) | Negative supply (redundant) | Second V– connection for improved grounding; electrically tied to Pin 4 internally. |
| 13 (+IN D) | Non-inverting input D | Fourth input; supports same Over-The-Top operation and input protection as other +IN pins. |
| 14 (OUT D) | Amplifier D output | Fourth rail-to-rail output; fully characterized for 25mA drive and 125°C operation. |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® Input Operation | Enables direct interface to 44V bus voltages without external level shifters or clamps. |
| Rail-to-Rail Input and Output | Maximizes dynamic range in low-voltage (3V) and high-voltage (44V) single-supply systems. |
| Reverse Battery Protection | Draws <1nA at –18V reverse supply - eliminates need for external blocking diodes in automotive power paths. |
| Phase Reversal Protection | Prevents false outputs during input faults below V–, critical for safety-critical sensor monitoring. |
| Guaranteed 125°C Operation | Full electrical specifications validated over –40°C to 125°C - suitable for engine control and industrial motor drives. |
| Capacitive Load Drive | Stable with ≥200pF loads; optional RC compensation extends stability to 1000pF for long-line transmission. |
Applications
| Battery Monitoring System | 4–20mA Transmitter |
|---|---|
Use Scenario: Real-time monitoring of 12V–48V lead-acid or Li-ion battery packs in UPS and solar charge controllers. IC Role / Device Role / Timing Role: Quad op amp configures two channels as high-side current sense amplifiers and two as voltage dividers with Over-The-Top inputs referenced to battery positive rail. Use Value: Eliminates isolated amplifiers or level shifters; measures cell voltage and charge current simultaneously with <1mV offset drift over temperature. | Use Scenario: Industrial process transmitter converting RTD or pressure sensor output to standardized 4–20mA loop signal. IC Role / Device Role / Timing Role: One amplifier conditions sensor signal, another serves as precision current source with rail-to-rail output driving loop transistor base. Use Value: Achieves <0.1% total error over –40°C to 125°C using single-supply design; reverse-battery protection prevents field failure during wiring errors. |
| Micropower Active Filter | Supply Current Sensing |
Use Scenario: Low-noise 2nd-order anti-aliasing filter in portable gas analyzers powered by coin-cell batteries. IC Role / Device Role / Timing Role: Two amplifiers implement Sallen-Key topology with unity-gain stable 1.2MHz GBW and 20nV/√Hz input noise. Use Value: Delivers 100dB stopband attenuation at 10kHz while consuming only 340μA total - extends battery life >2 years. | Use Scenario: High-side current measurement in 24V PLC I/O modules detecting short-circuit and overload conditions. IC Role / Device Role / Timing Role: Amplifier configured as difference amplifier across 0.1Ω shunt, with inputs referenced to 24V rail via Over-The-Top architecture. Use Value: Measures 0–5A with ±0.5% accuracy from –40°C to 125°C; no external high-voltage op amp required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | Lower GBW (6.4MHz), higher supply current (550μA/amp), no Over-The-Top capability, max 6V supply. | Restricted to low-voltage (<6V) consumer applications; unsuitable for 24V+ industrial sensing. | Select only for cost-sensitive, low-temp (<85°C), low-voltage designs where Over-The-Top is unnecessary. |
| OP497GPZ | Higher precision (25μV VOS), lower supply current (125μA/amp), but no rail-to-rail output and limited CMRR (80dB). | Requires dual supplies; cannot interface directly to 0V-referenced loads or 44V buses. | Choose for ultra-low-offset analog front-ends where rail-to-rail swing and high-voltage input are not required. |
Compared with TLV2464IDR and OP497GPZ, LT1639HS#TRPBF uniquely combines Over-The-Top input operation, rail-to-rail I/O, reverse-battery protection, and guaranteed 125°C performance - making it the only option for robust, single-supply, high-voltage industrial signal conditioning.
Availability
LT1639HS#TRPBF is available at Aetrix Electronics and suitable for battery monitoring systems, 4–20mA transmitters, and industrial sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1639HS#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT1639HS#TRPBF belongs to ADI's legacy Linear Technology precision op amp product line, engineered specifically for high-voltage, micropower, rail-to-rail signal conditioning in harsh industrial and automotive environments.
FAQ
What is the maximum common-mode input voltage for LT1639HS#TRPBF?
The LT1639HS#TRPBF supports a common-mode input voltage range of 0.3V to 44V relative to V–, enabling direct connection to 44V bus rails without external level-shifting components. This Over-The-Top® capability is guaranteed across the full –40°C to 125°C operating temperature range and applies independently to each of the four amplifier inputs in LT1639HS#TRPBF.
Does LT1639HS#TRPBF require external compensation for driving capacitive loads?
LT1639HS#TRPBF is internally compensated for stable operation with ≥200pF capacitive loads under all output conditions. For loads exceeding 200pF up to 1000pF, optional external compensation using a 0.22μF capacitor in series with a 150Ω resistor between output and ground is recommended. This configuration maintains phase margin >45° and prevents peaking or oscillation in LT1639HS#TRPBF-based buffer or filter circuits.
What is the reverse battery protection rating of LT1639HS#TRPBF?
LT1639HS#TRPBF provides reverse battery protection up to –18V on either supply pin, drawing less than 1nA supply current under reverse bias. This feature eliminates the need for external blocking diodes in automotive and industrial power systems, preserving efficiency and reducing bill-of-materials cost while ensuring robustness against wiring errors in LT1639HS#TRPBF-based designs.
Can LT1639HS#TRPBF operate from a single 3V supply?
Yes, LT1639HS#TRPBF is fully specified and guaranteed for operation from a single 3V supply (V+ = 3V, V– = 0V), delivering rail-to-rail input and output swing, 1.2MHz gain bandwidth, and 170μA quiescent current per amplifier. Its minimum operating supply voltage is 2.7V, making LT1639HS#TRPBF suitable for coin-cell and energy-harvesting applications where low-voltage operation is essential.
What is the output drive capability of LT1639HS#TRPBF at 125°C?
At 125°C, LT1639HS#TRPBF maintains a minimum output drive capability of 25mA per channel into resistive loads, with rail-to-rail output swing preserved (within 20mV of V+, 3mV of V– at no load). Electrical characteristics including VOL, VOH, and ISC are guaranteed over the full –40°C to 125°C range, ensuring reliable performance in under-hood automotive and industrial control applications using LT1639HS#TRPBF.
LT1639HS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.38V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 250 nA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 205µA (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LT1639HS#TRPBF FAQ
1.How can I place an order for LT1639HS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1639HS#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 LT1639HS#TRPBF reliable?
The price and inventory of LT1639HS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1639HS#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1639HS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1639HS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1639HS#TRPBF?
LT1639HS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1639HS#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 LT1639HS#TRPBF?
For technical support, including LT1639HS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1639HS#TRPBF requirements.
6.How does Aetrix verify that LT1639HS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1639HS#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 LT1639HS#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1639HS#TRPBF?
All LT1639HS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1639HS#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 LT1639HS#TRPBF part is unused and in its original packaging.
Return procedure for LT1639HS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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