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Texas Instruments OPA548F/500G3
- Part No.:
- OPA548F/500G3
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
OPA548F/500G3.pdf
- Description:
- IC POWER 1 CIRCUIT DDPAK/TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:430
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Product details
Overview
OPA548F/500G3 from Texas Instruments is a high-voltage, high-current operational amplifier designed for precision power amplification in demanding analog output stages. It delivers ±3-A continuous output current, supports ±4 V to ±30 V dual supplies (or 8–60 V single supply), and features adjustable current limiting (0–5 A), thermal shutdown with status reporting, and output disable control - enabling use in programmable lab power supplies and semiconductor test instrumentation.
For engineers reviewing the OPA548F/500G3 datasheet, OPA548F/500G3 pinout, OPA548F/500G3 application, or OPA548F/500G3 equivalent, key selection considerations include its 10 V/µs slew rate, ±2-mV input offset voltage, 7-pin TO-220 staggered package with copper tab for heatsinking, and E/S pin dual functionality for enable/disable and thermal fault monitoring.
Technical Context
The OPA548F/500G3 integrates a PNP-input stage with un-compensated bias currents, a high-current class A/B output stage with temperature-compensated biasing, and local feedback requiring external compensation only for highly reactive loads. Its ILIM pin accepts a 0–330 µA control signal to set current limit without series power resistors.
The Enable/Status (E/S) pin operates bidirectionally: pulling it low disables the output in 1 µs and reduces quiescent current to ±6 mA; monitoring its voltage (3.5 V above V– normal, ~0.35 V above V– during thermal shutdown) provides real-time die temperature status at junction temperatures exceeding 160°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | Dual: ±4 V to ±30 V; single: 8 V to 60 V - enables flexible rail configuration including asymmetric supplies (e.g., +55 V / –5 V). |
| Output Current | ±3 A continuous, ±5 A peak - sustains high-power drive into low-impedance loads like 4-Ω resistive or piezoelectric transducers. |
| Slew Rate | 10 V/µs - supports fast transient response in closed-loop configurations up to ~1 MHz gain-bandwidth product. |
| Input Offset Voltage | ±2 mV (typical) - ensures low DC error in precision voltage sourcing and current regulation applications. |
| Thermal Shutdown Threshold | 160°C junction temperature - protects device under overload or inadequate heatsinking; resets at 140°C. |
| Current Limit Range | 0 A to 5 A via external resistor on ILIM pin - eliminates need for high-power sense resistors in the output path. |
| Quiescent Current | ±17 mA active, ±6 mA shutdown - enables power-efficient multiplexed multi-channel systems. |
Pinout & Package
OPA548F/500G3 is housed in a 7-lead TO-220 staggered-lead package (KVT/KC variant) with exposed copper tab for direct heatsink mounting. Package dimensions are 10.17 mm × 8.38 mm (nominal), and the tab is electrically connected to V–.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN+ | Noninverting input | Accepts differential input signal; PNP input stage yields negative bias current (~–100 nA typical). |
| 2: VIN– | Inverting input | Feedback node; matched input impedance minimizes common-mode error when source impedances are balanced. |
| 3: ILIM | Current limit control input | Receives 0–330 µA current to set output current limit from 0 A to 5 A; open = 0 A, tied to V– = ~5 A. |
| 4: V– | Negative power supply | Reference for all negative-side circuitry; copper tab is internally connected to this pin. |
| 5: V+ | Positive power supply | Supplies high-current output stage; requires low-impedance bypassing (ceramic + tantalum recommended). |
| 6: VO | Amplifier output | Delivers ±3-A continuous current; output voltage swing is within 3.7 V of either rail at full load. |
| 7: E/S | Enable/Status bidirectional I/O | Pull ≤(V–)+0.8 V to disable output (1 µs); monitor voltage to detect thermal shutdown (drops from ~3.5 V to ~0.35 V above V–). |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable current limiting | 0–5 A set via external resistor on ILIM pin - avoids power loss and thermal stress of series-sense resistors in output path. |
| Output disable with status reporting | E/S pin simultaneously controls output state and reports thermal fault - enables fail-safe system-level monitoring without extra sensors. |
| Wide supply flexibility | Operates from ±4 V to ±30 V or 8–60 V single supply - supports asymmetric rails and legacy industrial power architectures. |
| Thermal protection with hysteresis | Shuts down at 160°C, resets at 140°C - prevents thermal runaway while allowing recovery without manual reset. |
| High-output current capability | ±3-A continuous, ±5-A peak into 8-Ω loads - drives demanding actuators, transducers, and test fixtures directly. |
Applications
| Programmable Lab Power Supply | Semiconductor Test Fixture |
|---|---|
Use Scenario: Benchtop or rack-mounted DC power supply with digitally adjustable voltage and current limits. IC Role / Device Role / Timing Role: Precision power amplifier core implementing voltage-controlled current source/sink with real-time thermal and overcurrent protection. Use Value: Enables single-chip programmable V/I sourcing up to ±10 V / ±2.5 A using DAC-controlled ILIM and E/S-monitored safety interlock. | Use Scenario: Automated test equipment (ATE) channel driving DUTs requiring high-current stimulus and precise compliance limits. IC Role / Device Role / Timing Role: High-fidelity output driver in parametric test modules, supporting fast settling (<15 µs) and low THD+N (0.02% at 1 kHz). Use Value: Delivers stable ±3-A drive into variable DUT impedances while providing hardware-enforced current limiting and thermal fault signaling to host controller. |
| Ultrasound Transducer Driver | Analog Input Module Excitation |
Use Scenario: Bipolar excitation stage for piezoelectric ultrasound transducers in medical or NDT systems. IC Role / Device Role / Timing Role: High-slew-rate power buffer generating ±20-V, 1–5 MHz burst waveforms with controlled current limiting to prevent transducer damage. Use Value: Sustains 10 V/µs slew rate into capacitive loads and uses ILIM to clamp peak current during resonance, improving transducer lifetime and signal fidelity. | Use Scenario: Precision excitation source for 4-wire RTD or strain gauge bridges in industrial analog input modules. IC Role / Device Role / Timing Role: Low-drift, high-current constant-current source (e.g., 1 mA to 10 mA) with rail-to-rail compliance and thermal margin monitoring. Use Value: Achieves <±2 mV offset and ±30 µV/°C drift over –40°C to +85°C, ensuring <0.1% measurement accuracy across temperature without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage, high-current operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA547F/500 | Lower quiescent current (±12 mA vs ±17 mA), same pinout and specs except reduced output current (±1.5 A continuous). | Suitable for lower-power precision drivers where thermal budget is constrained but full 3-A capability is unnecessary. | Select OPA547F/500 when 1.5-A output suffices and lower idle power is prioritized. |
| LM675T | Wider input voltage range (±20 V max), no E/S pin, fixed thermal shutdown only, 3-A continuous but no adjustable current limit. | Lacks programmable current limiting and thermal status reporting - requires external circuitry for safe operation in automated test systems. | Choose LM675T only for cost-sensitive, non-networked applications where basic high-current amplification suffices. |
Compared with OPA548F/500G3, OPA547F/500 trades output current for lower power consumption and identical integration, while LM675T omits critical safety and control features - making OPA548F/500G3 the only option supporting fully self-contained, digitally monitored high-current amplification.
Availability
OPA548F/500G3 is available at Aetrix Electronics and suitable for semiconductor test fixtures, programmable lab power supplies, ultrasound transducer drivers, and analog input module excitation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA548F/500G3 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, power management, and signal chain solutions.
The OPA548F/500G3 belongs to TI's high-voltage, high-current operational amplifier product line, engineered for robust, thermally protected power amplification in test, measurement, and industrial actuation systems.
FAQ
What is the maximum continuous output current specification for the OPA548F/500G3?
The OPA548F/500G3 delivers ±3 A continuous output current into resistive loads at specified operating conditions. Peak current capability reaches ±5 A for short durations. This rating assumes proper heatsinking and operation within the recommended junction temperature range (–40°C to +125°C). Derating applies above +85°C ambient per thermal metrics in the datasheet.
How does the ILIM pin function in the OPA548F/500G3?
The ILIM pin on the OPA548F/500G3 sets the output current limit from 0 A to 5 A using an external resistor between ILIM and V–. The relationship follows ILIM = (15000)(4.75) / (13750 Ω + RCL). Connecting ILIM directly to V– yields ~5 A limit; leaving it open disables output. This indirect sensing avoids power loss in the output path - a key differentiator of the OPA548F/500G3 architecture.
Can the OPA548F/500G3 operate from a single supply, and what is the minimum voltage?
Yes, the OPA548F/500G3 supports single-supply operation from 8 V to 60 V. Its input common-mode range extends below ground, enabling true single-supply use with inputs referenced to V–. For example, with V+ = 24 V and V– = 0 V, VIN– and VIN+ can accept signals down to –0.2 V, preserving linear operation near the negative rail - a critical feature for the OPA548F/500G3 in grounded-sensor interfaces.
What thermal protection features does the OPA548F/500G3 provide?
The OPA548F/500G3 includes internal thermal shutdown that activates at ~160°C junction temperature and resets at ~140°C. Thermal status is reported on the E/S pin: voltage drops from ~3.5 V to ~0.35 V above V– during shutdown. This allows external logic or microcontrollers to monitor fault conditions in real time - a built-in safety mechanism unique to the OPA548F/500G3 among comparable power op-amps.
Is the OPA548F/500G3 pin-compatible with other packages in the OPA548 family?
Yes, the OPA548F/500G3 uses the 7-lead TO-220 staggered-lead (KVT) package and shares identical pinout and electrical functionality with other OPA548 variants in TO-220 (KC) and DDPAK (KTW) packages. All variants use the same 7-pin assignment: VIN+, VIN–, ILIM, V–, V+, VO, and E/S - enabling drop-in replacement across thermal and assembly requirements without redesign.
OPA548F/500G3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Power
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 17mA
- Current - Output / Channel:
- 5 A
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 60 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-7)
OPA548F/500G3 FAQ
1.How can I place an order for OPA548F/500G3 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA548F/500G3 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 OPA548F/500G3 reliable?
The price and inventory of OPA548F/500G3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA548F/500G3 is usually 5 days.
3.What payment methods are accepted for OPA548F/500G3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA548F/500G3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA548F/500G3?
OPA548F/500G3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA548F/500G3 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 OPA548F/500G3?
For technical support, including OPA548F/500G3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA548F/500G3 requirements.
6.How does Aetrix verify that OPA548F/500G3 is sourced from the original manufacturer or authorized distributors?
All OPA548F/500G3 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 OPA548F/500G3 meets industry standards.
7.What is the process for return or replacement of OPA548F/500G3?
All OPA548F/500G3 units undergo pre-shipment inspection (PSI). If there is an issue with OPA548F/500G3, 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 OPA548F/500G3 part is unused and in its original packaging.
Return procedure for OPA548F/500G3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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