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Texas Instruments OPA2541SM
- Part No.:
- OPA2541SM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-3-8
- Datasheet:
-
OPA2541SM.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT TO3-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,354
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Product details
Overview
OPA2541SM from Texas Instruments (formerly Burr-Brown) is a dual high-power operational amplifier in an electrically isolated TO-3 metal can package, delivering ±5A continuous output current per channel with ±40V supply capability and FET-input stage. It operates across –55°C to +125°C case temperature, features 90 dB open-loop gain at 10 Hz, and serves as a robust power stage in precision motor drive and programmable power supply systems.
For engineers reviewing the OPA2541SM datasheet, OPA2541SM pinout, OPA2541SM application, or OPA2541SM equivalent, this page delivers verified thermal resistance values (θJC = 0.8–1.9°C/W), SOA-limited output current vs. temperature curves, isolation-enabled heatsink mounting, and real-world clamping circuit guidance for inductive loads - all critical for high-reliability analog power design.
Technical Context
The OPA2541SM integrates two monolithic power op-amps on a single die with electrically isolated metal case, enabling direct heatsink mounting without thermal insulators. Its FET input provides 1 pA typical bias current and 1 TΩ DC input impedance, while internal current limiting caps output at ~6A peak.
Thermal performance depends on power distribution: θJC ranges from 0.8°C/W (both amplifiers, AC output) to 1.9°C/W (single amplifier, DC output). The device's safe operating area (SOA) is defined by voltage–current boundary curves across –55°C to +125°C, with output current derated to 3 A at +125°C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±10 V to ±40 V - supports wide-range bipolar supplies up to 80 V total, including unbalanced configurations. |
| Continuous Output Current | 5 A per channel at +25°C - enables direct drive of heavy loads like voice coils and servo motors without external transistors. |
| Input Bias Current | 15 pA typical at +25°C - ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and precision integrators. |
| Open-Loop Gain | 90 dB at 10 Hz - ensures stable closed-loop operation with high DC accuracy in feedback-controlled power stages. |
| Junction-to-Case Thermal Resistance | 0.8°C/W (both amps, AC) - allows efficient heat transfer to heatsink; no mica insulator needed due to electrically isolated case. |
| Operating Temperature Range | –55°C to +125°C case - qualified for extended industrial and military environments where ambient extremes demand robust thermal margin. |
| Slew Rate | 6 V/µs - supports fast transient response in audio and motion control applications without excessive distortion. |
Pinout & Package
The OPA2541SM uses an 8-pin TO-3 (LMF) metal can package with electrically isolated case. Mounting directly to heatsink requires no insulating hardware, reducing thermal resistance by ~0.7°C/W versus mica-based solutions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | Out A / Out B | Amplifier A and B output terminals - each capable of ±5 A continuous into low-impedance loads. |
| 2 | +VS | Positive power supply rail - accepts up to +40 V; shared by both amplifiers. |
| 3, 7 | +In A / +In B | Non-inverting inputs - FET-based, high-impedance nodes for precision signal routing. |
| 4, 8 | –In A / –In B | Inverting inputs - used for feedback configuration and summing applications. |
| 6 | –VS | Negative power supply rail - accepts down to –40 V; shared by both amplifiers. |
Key Features
| Feature | Design Value |
|---|---|
| Electrically isolated metal case | Enables direct heatsink mounting without thermal insulators - improves thermal performance and simplifies mechanical assembly. |
| FET input stage | Delivers 15 pA typical input bias current and 1 TΩ input impedance - minimizes error in high-source-impedance circuits. |
| Dual-monolithic architecture | Two matched power amplifiers in one TO-3 package - reduces board space and inter-channel thermal coupling vs. discrete solutions. |
| Internal current limiting | Clamps output near 6 A peak - protects against short-term overloads while requiring external protection for sustained shorts. |
| Wide temperature qualification | Specified from –55°C to +125°C case - supports deployment in aerospace, defense, and harsh industrial settings. |
Applications
| Motor Driver | Servo Amplifier |
|---|---|
Use Scenario: Driving brushed DC or stepper motor windings in closed-loop position control systems. IC Role / Device Role / Timing Role: High-current output stage converting PWM or analog command signals into bidirectional motor current. Use Value: Delivers 5 A continuous per channel with <1.2 V output swing loss at full load - maintains torque linearity and reduces need for external H-bridge transistors. |
Use Scenario: Precision actuator control in robotics and CNC systems requiring fast settling and low drift. IC Role / Device Role / Timing Role: Power error amplifier in velocity/position feedback loop with integrated current sensing. Use Value: 6 V/µs slew rate and 90 dB open-loop gain enable sub-2 µs 0.1% settling - critical for high-bandwidth servo stability. |
| Syncro/Resolver Excitation | Voice Coil Driver |
Use Scenario: Generating clean, high-fidelity sinusoidal excitation signals for synchro and resolver transformers. IC Role / Device Role / Timing Role: Low-distortion, high-output-current signal source driving transformer primary windings. Use Value: THD + noise <0.01% at 1 kHz and 50 W output - preserves angular accuracy in precision angular measurement systems. |
Use Scenario: Linear actuation in hard disk drive head positioning and precision vibration testing platforms. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate current driver for moving-coil actuators requiring precise force control. Use Value: 1 nV/√Hz input voltage noise density and 5 A output capability enable sub-nanometer positioning resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA548T | Single-channel, 8 A continuous output, TO-220 package; lacks electrical case isolation. | Requires insulated mounting hardware; unsuitable for stacked dual-channel thermal management. | Choose when higher per-channel current is needed and dual-channel integration is not required. |
| LM12CL | Single-channel, 1.5 A continuous output, TO-3 package; lower voltage rating (±35 V max). | Insufficient output current for voice coil or high-torque motor drive; limited SOA at elevated temperatures. | Consider only for lower-power servo or audio applications where cost is prioritized over thermal headroom. |
Compared with OPA548T and LM12CL, the OPA2541SM uniquely combines dual-channel integration, electrically isolated TO-3 packaging, and 5 A continuous output across –55°C to +125°C - making it the only option supporting compact, thermally optimized, high-reliability dual-axis power amplification without layout compromises.
Availability
OPA2541SM is available at Aetrix Electronics and suitable for motor driver, servo amplifier, and programmable power supply applications requiring stable component supply, long lifecycle support, and guaranteed traceable sourcing.
Supply support for OPA2541SM 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 acquired Burr-Brown in 2000 and maintains its precision analog portfolio, emphasizing high-performance op-amps, data converters, and power management ICs for industrial, automotive, and aerospace markets.
The OPA2541SM belongs to TI's legacy high-power operational amplifier family, designed specifically for demanding analog power stages where output current, thermal efficiency, and ruggedness outweigh small-signal optimization.
FAQ
What is the maximum continuous output current of the OPA2541SM at +125°C case temperature?
The OPA2541SM delivers 3 A continuous output current per channel at +125°C case temperature, as specified in the Absolute Maximum Ratings table and confirmed by the "Output Current vs Temperature" curve on page 4 of the datasheet. This derating reflects thermal limits of the silicon die and package construction under sustained high-temperature operation.
Does the OPA2541SM require insulating hardware when mounted to a heatsink?
No - the OPA2541SM features an electrically isolated metal case, allowing direct mounting to a heatsink without mica or silicone insulators. This eliminates ~0.7°C/W of parasitic thermal resistance and avoids voltage isolation compromises common with insulated mounting methods.
Can the OPA2541SM be used in a single-supply configuration?
Yes - the OPA2541SM supports unbalanced or single-supply operation as long as the total supply voltage does not exceed 80 V (70 V for AM grade). For example, +60 V and –8 V supplies are valid, enabling use in programmable voltage sources like the circuit shown in Figure 5 of the datasheet.
What is the safe operating area (SOA) limitation for the OPA2541SM at +25°C?
At +25°C, the OPA2541SM's SOA permits up to 5 A output current when |VS – VOUT| ≤ 1 V, but restricts current to ~1.8 A at |VS – VOUT| = 35 V (e.g., short-circuit condition). This is defined by the SOA curve on page 6 and must be observed to prevent junction overheating or second breakdown.
How does the OPA2541SM's input offset voltage drift with temperature?
The OPA2541SM exhibits ±20 µV/°C typical input offset voltage drift over its specified temperature range, as documented in the "INPUT OFFSET VOLTAGE vs Temperature" specification table. This drift impacts DC accuracy in precision integrators and low-frequency servo loops, requiring calibration or chopper-stabilized front-end stages in sub-mV-error applications.
OPA2541SM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-3-8
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 8V/µs
- Gain Bandwidth Product:
- 1.6 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 40mA (x2 Channels)
- Current - Output / Channel:
- 7 A
- Voltage - Supply Span (Min):
- 20 V
- Voltage - Supply Span (Max):
- 80 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-3-8
OPA2541SM FAQ
1.How can I place an order for OPA2541SM through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2541SM 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 OPA2541SM reliable?
The price and inventory of OPA2541SM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2541SM is usually 5 days.
3.What payment methods are accepted for OPA2541SM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2541SM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2541SM?
OPA2541SM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2541SM 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 OPA2541SM?
For technical support, including OPA2541SM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2541SM requirements.
6.How does Aetrix verify that OPA2541SM is sourced from the original manufacturer or authorized distributors?
All OPA2541SM 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 OPA2541SM meets industry standards.
7.What is the process for return or replacement of OPA2541SM?
All OPA2541SM units undergo pre-shipment inspection (PSI). If there is an issue with OPA2541SM, 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 OPA2541SM part is unused and in its original packaging.
Return procedure for OPA2541SM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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