Overview
The OPA549S, produced by Texas Instruments, is a low-cost, high-voltage/high-current operational amplifier designed to drive a wide variety of loads. This laser-trimmed monolithic integrated circuit offers excellent low-level signal accuracy and high output voltage and current. It operates from either single or dual power supplies, providing design flexibility, and its input common-mode range extends below the negative supply. The OPA549S is internally protected against over-temperature conditions and current overloads, and it features an adjustable current limit and output disable control.
Key Specifications
| Parameter | Condition | Min | Max | Units | |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VCM = 0V, IO = 0 | ±1 | ±5 | mV | |
| Input Bias Current (IB) | VCM = 0V | -100 | -500 | nA | |
| Input Offset Current (IOS) | VCM = 0V | ±5 | ±50 | nA | |
| Power Supply Range (Single Supply) | +8V | +60V | |||
| Power Supply Range (Dual Supply) | ±4V | ±30V | |||
| Output Current (Continuous) | 8A | ||||
| Output Current (Peak) | 10A | ||||
| Slew Rate | G = 1, 50-Vp-p step, RL = 4 Ω | 9 | V/µs | ||
| Operating Temperature Range | -40°C | +85°C |
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: Excellent output voltage swing capabilities
- Fully Protected: Thermal shutdown, adjustable current limit, output disable control, and thermal shutdown indicator
- High Slew Rate: 9V/µs
- Control Reference Pin: Provides a reference point for current limit and enable/status functions
- 11-Lead Power Package: With a copper tab for easy heat sink mounting
Applications
- Valve, Actuator Drivers: Ideal for controlling valves and actuators in various industrial applications
- Synchro, Servo Drivers: Suitable for driving synchro and servo motors
- Power Supplies: Used in power supply designs requiring high current and voltage
- Test Equipment: Employed in test equipment for its high accuracy and reliability
- Transducer Excitation: For exciting transducers in measurement and control systems
- Audio Power Amplifiers: Can be used in audio power amplifier applications
Q & A
- What is the maximum continuous output current of the OPA549S?
The maximum continuous output current is 8A, with a peak current of up to 10A.
- What is the power supply range for the OPA549S?
The OPA549S operates from a single supply of +8V to +60V or a dual supply of ±4V to ±30V.
- How is the current limit adjusted in the OPA549S?
The current limit can be adjusted from 0A to 10A using a resistor/potentiometer or controlled digitally with a DAC.
- What protection features does the OPA549S have?
The OPA549S is protected against over-temperature conditions, current overloads, and has an adjustable current limit and output disable control.
- What is the slew rate of the OPA549S?
The slew rate is 9V/µs.
- What is the operating temperature range of the OPA549S?
The operating temperature range is -40°C to +85°C.
- How does the Enable/Status (E/S) pin function?
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.
- What package type is the OPA549S available in?
The OPA549S is available in an 11-lead power package with a copper tab for heat sink mounting.
- What are some common applications of the OPA549S?
Common applications include valve and actuator drivers, synchro and servo drivers, power supplies, test equipment, transducer excitation, and audio power amplifiers.
- How does the control reference pin function?
The control reference pin provides a reference point for the current limit and enable/status functions and can be set to V-, ground, or any user-defined reference.
