Overview
The OPA547FKTWTG3 is a high-voltage, high-current operational amplifier produced by Texas Instruments. It is designed to drive a wide variety of loads with excellent low-level signal accuracy and high output voltage and current. This amplifier operates from either single or dual supplies, offering design flexibility, and is internally protected against over-temperature conditions and current overloads. The OPA547 is available in industry-standard 7-lead staggered and straight lead TO-220 packages, as well as a 7-lead DDPAK surface-mount plastic power package, ensuring good thermal performance.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply Voltage | V+ to V– | - | - | 60V | V |
| Input Voltage | (V–) – 0.5V to (V+) + 0.5V | - | - | - | V |
| Output Current | - | - | - | 500mA | mA |
| Operating Temperature | - | -40°C | - | 125°C | °C |
| Storage Temperature | - | -55°C | - | 125°C | °C |
| Junction Temperature | - | - | - | 150°C | °C |
| Input Offset Voltage | VCM = 0, IO = 0 | ±1mV | ±5mV | - | mV |
| Input Bias Current | VCM = 0V | -100nA | -500nA | - | nA |
| Quiescent Current | ILIM Connected to V–, IO = 0 | ±10mA | ±15mA | - | mA |
Key Features
- Wide Supply Range: Single supply: +8V to +60V, Dual supply: ±4V to ±30V
- High Output Current: 500mA continuous
- Wide Output Voltage Swing: Excellent performance across the full operating voltage range
- Full Protection: Thermal shutdown, adjustable current limit
- Output Disable Control: Enables output stage to be disabled, reducing quiescent current
- Thermal Shutdown Indicator: Status output to monitor thermal shutdown
- High Slew Rate: Suitable for high-speed applications
- Adjustable Current Limit: Set from 0mA to 750mA with a 0 to 150µA control signal
Applications
- Programmable Power Supplies: Can be used to build programmable power supplies with adjustable output voltage and current
- Voltage Sources: Can provide an accurate voltage source with minimal external components
- High-Current Drive Applications: Suitable for driving reactive and EMF-generating loads, such as motors and solenoids
- Industrial Control Systems: Used in various industrial control systems requiring high voltage and current drive capabilities
- Automotive Systems: Applicable in automotive systems where high reliability and robust performance are necessary
Q & A
- What is the operating temperature range of the OPA547?
The OPA547 operates over an extended industrial temperature range of –40°C to +85°C.
- What is the maximum output current of the OPA547?
The maximum continuous output current is 500mA.
- How can the current limit be adjusted on the OPA547?
The current limit can be adjusted from 0mA to 750mA using a 0 to 150µA control signal on the ILIM pin.
- What is the purpose of the Enable/Status (E/S) pin?
The E/S pin disables the output stage and reduces quiescent current when in the low state. It also indicates thermal shutdown status.
- What are the package options for the OPA547?
The OPA547 is available in 7-lead staggered and straight lead TO-220 packages, and a 7-lead DDPAK surface-mount plastic power package.
- How does the OPA547 protect against over-temperature conditions?
The OPA547 has internal thermal shutdown protection that activates when the junction temperature exceeds +160°C and resets at +140°C.
- Can the OPA547 operate with single or dual supplies?
Yes, the OPA547 can operate from either single (+8V to +60V) or dual (±4V to ±30V) supplies.
- What is the quiescent current when the output is disabled?
The quiescent current is approximately ±4mA when the output is disabled.
- How can reactive and EMF-generating loads be protected with the OPA547?
Clamp diodes from the output terminal to the power supplies can be used to prevent damaging conditions such as output voltage exceeding the power-supply voltage.
- Can the OPA547 be used in programmable power supply applications?
Yes, the OPA547 can be used to build programmable power supplies with adjustable output voltage and current.
