Overview
The OPA549TG3, 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 with a wide power-supply range of +8V to +60V for single supply and ±4V to ±30V for dual supply. The input common-mode range extends below the negative supply, and the device is internally protected against over-temperature conditions and current overloads. The OPA549TG3 is available in an 11-lead power package with a copper tab for easy mounting to a heat sink, ensuring excellent thermal performance over an extended industrial temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| High Output Current | 8A Continuous, 10A Peak | A |
| Power-Supply Range | Single: +8V to +60V, Dual: ±4V to ±30V | V |
| Input Voltage Range | (V–) – 0.5V to (V+) + 0.5V | V |
| Input Offset Voltage | ±1 to ±5 mV | mV |
| Input Bias Current | –100 to –500 nA | nA |
| Slew Rate | 9 V/µs | V/µs |
| Common Mode Rejection Ratio | 80 dB | dB |
| Operating Temperature | –40°C to +85°C | °C |
| Package Type | TO-220-11 (Formed Leads) | |
| Number of Pins | 11 |
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 across the operating range
- Fully Protected: Thermal shutdown and adjustable current limit
- Output Disable Control: Enable/Status (E/S) pin to disable the output stage
- Thermal Shutdown Indicator: E/S pin indicates thermal shutdown
- High Slew Rate: 9 V/µs
- Control Reference Pin: Reference pin for control signals
- 11-Lead Power Package: With copper tab for heat sink mounting
Applications
- Valve and Actuator Drivers: Suitable for driving high-current loads in industrial control systems
- Servo and Synchro Drivers: Ideal for precision control in servo and synchro systems
- Power Supplies: Can be used in various power supply configurations
- Test Equipment: Useful in test and measurement equipment requiring high current and voltage
- Transducer Excitation: Suitable for exciting transducers in measurement systems
- Audio Power Amplifiers: Can be used in high-power audio applications
Q & A
- What is the maximum continuous output current of the OPA549TG3?
The maximum continuous output current is 8A, with a peak current of 10A.
- What is the operating temperature range of the OPA549TG3?
The operating temperature range is –40°C to +85°C.
- How does the OPA549TG3 adjust its current limit?
The current limit can be adjusted from 0A to 10A using a resistor/potentiometer or controlled digitally with a DAC.
- What is the purpose of the Enable/Status (E/S) pin?
The E/S pin can be monitored to determine thermal shutdown and forced low to disable the output stage.
- What type of package does the OPA549TG3 come in?
The OPA549TG3 comes in an 11-lead power package (TO-220-11 with formed leads).
- What is the slew rate of the OPA549TG3?
The slew rate is 9 V/µs.
- What is the common-mode rejection ratio of the OPA549TG3?
The common-mode rejection ratio is 80 dB.
- Can the OPA549TG3 operate with single or dual power supplies?
Yes, it can operate with either single (+8V to +60V) or dual (±4V to ±30V) power supplies.
- What are some typical applications of the OPA549TG3?
Typical applications include valve and actuator drivers, servo and synchro drivers, power supplies, test equipment, transducer excitation, and audio power amplifiers.
- How does the OPA549TG3 protect against over-temperature conditions?
The device is internally protected against over-temperature conditions with thermal shutdown and an indicator on the E/S pin.
