Overview
The OPA549SG3 is a high-voltage, high-current operational amplifier produced by Texas Instruments. This laser-trimmed monolithic integrated circuit is designed to provide excellent low-level signal accuracy and high output voltage and current. It is ideal for driving a wide variety of loads and operates from either single or dual supplies, offering design flexibility. The input common-mode range extends below the negative supply, and the device is internally protected against over-temperature conditions and current overloads. The OPA549SG3 is available in an 11-lead power package, specifically the TO-220-11 (Formed Leads) package, which includes a copper tab for easy mounting to a heat sink to ensure excellent thermal performance. The device operates over an extended industrial temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Number of Channels | 1 | |
| Input Bias Current (Max) | 500,000 | pA |
| Quiescent Current per Channel (Typ) | 26 | mA |
| Quiescent Current per Channel (Max) | 35 | mA |
| Offset Voltage (Max) | 5 | mV |
| Offset Drift (Typ) | 20 | μV/°C |
| Common Mode Rejection Ratio (CMRR) (Typ) | 95 | dB |
| Gain Bandwidth Product (GBW) (Typ) | 0.9 | MHz |
| Slew Rate (Typ) | 9 | V/μs |
| Output Current (Typ) | 8000 | mA |
| Total Supply Voltage (Min) | 8 | V |
| Total Supply Voltage (Max) | 60 | V |
| Operating Temperature Range | -40 to +85 | °C |
| Package Type | TO-220-11 (Formed Leads) |
Key Features
- High Output Current: 8A continuous, 10A peak.
- Wide Power-Supply Range: Single supply: +8V to +60V, Dual supply: ±4V to ±30V.
- Wide Output Voltage Swing: Extends below the negative supply.
- Fully Protected: Thermal shutdown, adjustable current limit.
- Output Disable Control: Enable/Status (E/S) pin to disable output stage and indicate thermal shutdown.
- High Slew Rate: 9V/μs.
- Control Reference Pin: For adjusting current limit and other control functions.
- 11-Lead Power Package: TO-220-11 (Formed Leads) with copper tab for heat sinking.
Applications
- Valve, Actuator Drivers: Suitable for controlling valves and actuators in various industrial applications.
- Syncho, Servo Drivers: Used in servo and synchro systems for precise control.
- Power Supplies: Can be used in power supply designs requiring high current and voltage.
- Test Equipment: Ideal for test and measurement equipment due to its high accuracy and reliability.
- Transducer Excitation: Used for exciting transducers in various measurement systems.
- Audio Power Amplifiers: Suitable for high-power audio applications requiring high current and voltage swing.
Q & A
- What is the OPA549SG3 operational amplifier used for?
The OPA549SG3 is used for driving a wide variety of loads, including valve and actuator drivers, servo and synchro systems, power supplies, test equipment, transducer excitation, and audio power amplifiers.
- What are the key features of the OPA549SG3?
The key features include high output current, wide power-supply range, wide output voltage swing, full protection against thermal shutdown and current overloads, output disable control, high slew rate, and an 11-lead power package.
- What is the operating temperature range of the OPA549SG3?
The operating temperature range is –40°C to +85°C.
- How does the OPA549SG3 protect against over-temperature conditions?
The OPA549SG3 is internally protected against over-temperature conditions through thermal shutdown and current limit features.
- What is the typical output current of the OPA549SG3?
The typical output current is 8A continuous, with a peak of 10A.
- What is the purpose of the Enable/Status (E/S) pin?
The E/S pin can be monitored to determine if the device is in thermal shutdown and can be forced low to disable the output stage and disconnect the load.
- How can the current limit be adjusted in the OPA549SG3?
The current limit can be adjusted from 0A to 10A using a resistor/potentiometer or controlled digitally with a voltage-out or current-out Digital-to-Analog Converter (DAC).
- What is the package type of the OPA549SG3?
The package type is TO-220-11 (Formed Leads).
- What is the slew rate of the OPA549SG3?
The slew rate is 9V/μs.
- Can the OPA549SG3 operate from single or dual supplies?
Yes, the OPA549SG3 can operate from either single or dual supplies, offering design flexibility.
