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Texas Instruments OPA549MKVC
- Part No.:
- OPA549MKVC
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-220-11, Power Package
- Datasheet:
-
OPA549MKVC.pdf
- Description:
- IC OPAMP POWER 1 CIRC 11PWRPACK
- Quantity:
- Payment:
- Shipping:
Inventory:439
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Product details
Overview
OPA549MKVC from Texas Instruments is a high-voltage, high-current operational amplifier designed for precision power amplification in demanding industrial and defense systems. It delivers 8-A continuous output current, operates from ±4 V to ±30 V dual supplies (or 8–60 V single supply), features adjustable current limiting from 0 A to 10 A via the ILIM pin, and includes thermal shutdown with E/S pin status indication - used in servo drivers, valve actuators, and high-power transducer excitation.
For engineers reviewing the OPA549MKVC datasheet, OPA549MKVC pinout, OPA549MKVC application, or OPA549MKVC equivalent, this page provides verified specifications, validated pin functions, confirmed military-grade temperature range (−55°C to 125°C), real-world thermal derating data per Figure 2, and two rigorously cross-checked alternative parts for high-current op-amp selection.
Technical Context
The OPA549MKVC implements a monolithic, laser-trimmed op-amp architecture with internal current-sense feedback enabling precise, resistor- or DAC-controlled current limiting without series output resistors. Its input common-mode range extends below V−, supporting rail-to-rail input operation in single-supply configurations.
Thermal protection uses junction-sensing circuitry that disables output at ~160°C and re-enables at ~140°C, with status reported on the open-drain E/S pin. The 11-lead KVC package integrates a copper tab electrically tied to V− for low-θJCbot (0.1°C/W) heat sinking - critical for sustained 8-A operation under −55°C to 125°C ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8-A continuous, 10-A peak - supports high-force actuator and servo drive loads without external current boosters. |
| Supply Range | ±4 V to ±30 V dual or 8 V to 60 V single - enables flexible system-level power architecture across industrial and aerospace platforms. |
| Slew Rate | 9 V/µs - ensures faithful reproduction of fast transient signals in test equipment and audio power stages. |
| Input Offset Voltage | ±5 mV max (25°C), ±7 mV over full temperature - maintains DC accuracy in closed-loop control loops with low-gain feedback. |
| Current Limit Range | 0 A to ±10 A via ILIM pin - allows dynamic load protection tuning without hardware changes, using standard resistors or DACs. |
| Thermal Shutdown Threshold | Junction temperature ~160°C - protects die integrity during overload while permitting safe recovery at ~140°C. |
| Operating Temperature | −55°C to 125°C case temperature - qualified for HiRel defense, aerospace, and medical applications per SLOS744. |
Pinout & Package
The OPA549MKVC is housed in an 11-lead KVC power package with exposed copper thermal tab internally connected to V−. Mounting the tab to a heatsink achieves θJCbot = 0.1°C/W, essential for sustained high-current operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | Output (VO) | High-current output terminals - both pins must be connected to load for rated 8-A capability and thermal balance. |
| 3 | Inverting Input (–In) | Differential input node - accepts feedback signals for closed-loop configurations including inverting amplifiers and current sources. |
| 4 | Non-inverting Input (+In) | Differential input node - used for unity-gain buffers, non-inverting amplifiers, and sensor signal conditioning. |
| 5, 7 | Negative Supply (V−) | Power return path - both pins must connect to V−; tab is electrically tied to V− but not for current conduction. |
| 6 | Reference (Ref) | User-accessible bias reference - sets voltage baseline for ILIM and E/S pins; configurable from V− to (V+) – 8 V. |
| 8 | Current Limit (ILIM) | Analog control input - sets output current limit from 0 A to 10 A via resistor or DAC; referenced to Ref pin. |
| 9 | Enable/Status (E/S) | Open-drain bidirectional pin - forced low disables output in 1 µs; voltage drop to ~0.2 V above Ref indicates thermal shutdown. |
| 10, 11 | Positive Supply (V+) | High-voltage power input - both pins must connect to V+; supports up to 60-V differential supply rails. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable current limiting | 0–10 A set via external resistor or DAC on ILIM pin - eliminates need for lossy series current-sense resistors in output path. |
| Thermal shutdown with status reporting | E/S pin outputs logic-low voltage (~0.2 V above Ref) during thermal shutdown - enables real-time fault monitoring without external sensors. |
| Output disable control | Forcing E/S ≤ (Ref + 0.8 V) disables output in 1 µs and reduces quiescent current to ±6 mA - ideal for power-gated multi-channel systems. |
| Wide supply flexibility | Operates from ±4 V to ±30 V dual or 8–60 V single supply - accommodates legacy 24-V industrial rails and high-voltage test equipment. |
| Laser-trimmed precision | ±5-mV max input offset and ±20-µV/°C drift - ensures stable DC gain in closed-loop valve and actuator control without recalibration. |
Applications
| Valve & Actuator Drivers | Synchro & Servo Drivers |
|---|---|
Use Scenario: Driving high-inductance hydraulic or pneumatic valves requiring precise 0–10 A current control with fast response. IC Role / Device Role / Timing Role: High-current op-amp configured as precision current source with adjustable ILIM-based overload protection. Use Value: Enables direct drive of solenoid coils without discrete pass transistors, reducing BOM count and improving thermal reliability. |
Use Scenario: Exciting synchro transformers and controlling torque motors in flight control surfaces and radar positioning systems. IC Role / Device Role / Timing Role: High-slew-rate (9 V/µs), wide-output-swing amplifier delivering clean sinusoidal excitation and error correction signals. Use Value: Maintains phase fidelity and low THD+N (0.015% at 1 kHz) across −55°C to 125°C, meeting MIL-STD-810 environmental requirements. |
| High-Power Transducer Excitation | Industrial Test Equipment |
Use Scenario: Biasing piezoelectric transducers and ultrasonic drivers needing stable high-voltage, high-current excitation waveforms. IC Role / Device Role / Timing Role: Precision power amplifier with rail-to-rail output swing (to within 2.7 V of rails at 8 A) and low noise density (705 nV/√Hz). Use Value: Delivers clean, distortion-free excitation up to 25 W into 4 Ω, eliminating need for external output stage buffering. |
Use Scenario: Programmable DC/AC power supplies and automated test systems requiring rapid output enable/disable and thermal fault logging. IC Role / Device Role / Timing Role: Programmable current-limited power stage with E/S pin providing synchronized enable control and thermal event flagging. Use Value: Supports automated self-test sequences via E/S pin status, reducing test time and enabling predictive maintenance alerts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA548TJ | Lower continuous current (5 A vs. 8 A), same 11-lead KVC package, identical pinout and Ref/ILIM/E/S functionality. | Better suited for space-constrained 5-A applications where thermal margin is less critical; lacks extended life derating curve for 10-year operation at 105°C. | Select OPA548TJ when 5-A output suffices and cost optimization is prioritized over maximum current headroom. |
| LM675T | 7-A continuous output, TO-220-11 package, no integrated current limit or E/S status pin - requires external sensing and protection circuitry. | Requires additional components for current limiting and thermal monitoring; not qualified for −55°C operation or HiRel applications. | Choose LM675T only for commercial-grade, lower-cost designs where external protection is acceptable and military temperature range is unnecessary. |
Compared with OPA549MKVC, OPA548TJ offers identical interface and packaging at reduced current rating and lifetime assurance, while LM675T demands external circuitry for protection and lacks military-grade qualification - making OPA549MKVC the sole choice for fully integrated, field-reliable 8-A operation across extreme temperatures.
Availability
OPA549MKVC is available at Aetrix Electronics and suitable for valve actuation, servo control, and high-power transducer excitation requiring stable component supply across extended temperature and long-life mission profiles.
Supply support for OPA549MKVC 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in high-reliability op-amps and power management ICs.
The OPA549MKVC belongs to TI's HiRel operational amplifier product line, engineered specifically for defense, aerospace, and medical systems demanding guaranteed performance from −55°C to 125°C and extended operational life under continuous high-current stress.
FAQ
What is the maximum continuous output current rating for the OPA549MKVC?
The OPA549MKVC is rated for 8-A continuous output current under specified thermal conditions. While it supports 10-A peak current, sustained operation above 8 A degrades long-term reliability and is not recommended per the datasheet's operating life derating chart (Figure 2). This rating assumes proper heatsinking and case temperature maintained within −55°C to 125°C. The OPA549MKVC achieves this using its low-θJCbot (0.1°C/W) KVC package and internal current-limit architecture.
How does the ILIM pin on the OPA549MKVC set current limit?
The ILIM pin on the OPA549MKVC accepts a 0–633-μA control current (or corresponding voltage) referenced to the Ref pin, enabling precise adjustment of output current limit from 0 A to 10 A. Using a resistor between ILIM and Ref yields predictable limits (e.g., 7.5 kΩ → ±5 A); a DAC can provide dynamic digital control. Unlike conventional designs, the OPA549MKVC senses load current indirectly - avoiding power loss and thermal issues associated with series sense resistors in the output path.
What function does the E/S pin serve on the OPA549MKVC?
The E/S (Enable/Status) pin on the OPA549MKVC serves two distinct functions: (1) forcing it ≤ (Ref + 0.8 V) disables the output stage in 1 µs, reducing quiescent current to ±6 mA; (2) monitoring its voltage reveals thermal status - ~3.5 V above Ref indicates normal operation, while ~0.2 V above Ref signals active thermal shutdown. This dual-role pin eliminates need for separate enable and fault-reporting circuitry in compact, high-reliability systems using the OPA549MKVC.
Is the OPA549MKVC qualified for military temperature range operation?
Yes, the OPA549MKVC is explicitly qualified for operation from −55°C to 125°C case temperature, as confirmed in the ordering table and absolute maximum ratings section of the SLOS744 datasheet. It is part of TI's HiRel product family, with controlled baseline, extended product life cycle, and product traceability - meeting requirements for defense, aerospace, and medical applications where extended temperature performance and long-term reliability are mandatory. The OPA549MKVC's thermal derating curve (Figure 2) further validates its 10-year design life at 105°C junction temperature.
What package type and thermal characteristics define the OPA549MKVC?
The OPA549MKVC uses the 11-lead KVC power package with an exposed copper thermal tab internally connected to V−. Key thermal metrics include θJCbot = 0.1°C/W (junction-to-case bottom), θJA = 21.5°C/W (junction-to-ambient, JEDEC high-K board), and ψJB = 9.2°C/W (junction-to-board characterization). These values enable effective heat transfer when mounted to a heatsink, supporting sustained 8-A output. The KVC package is distinct from standard SOIC or TO-220 variants and is shared across TI's OPA54x HiRel amplifier series, including the OPA549MKVC.
OPA549MKVC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-220-11, Power Package
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Power
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 9V/µs
- Gain Bandwidth Product:
- 900 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 26mA
- Current - Output / Channel:
- 10 A
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 60 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 11-Power Package
OPA549MKVC FAQ
1.How can I place an order for OPA549MKVC through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA549MKVC 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 OPA549MKVC reliable?
The price and inventory of OPA549MKVC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA549MKVC is usually 5 days.
3.What payment methods are accepted for OPA549MKVC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA549MKVC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA549MKVC?
OPA549MKVC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA549MKVC 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 OPA549MKVC?
For technical support, including OPA549MKVC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA549MKVC requirements.
6.How does Aetrix verify that OPA549MKVC is sourced from the original manufacturer or authorized distributors?
All OPA549MKVC 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 OPA549MKVC meets industry standards.
7.What is the process for return or replacement of OPA549MKVC?
All OPA549MKVC units undergo pre-shipment inspection (PSI). If there is an issue with OPA549MKVC, 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 OPA549MKVC part is unused and in its original packaging.
Return procedure for OPA549MKVC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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