Overview
The OPA547T-1 is a low-cost, 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. The OPA547T-1 operates from either single or dual supplies, offering design flexibility, and its input common-mode range extends below ground in single-supply operation. The amplifier is internally protected against over-temperature conditions and current overloads, and it features an adjustable current limit and output disable control. It is available in industry-standard 7-lead TO-220 and 7-lead DDPAK surface-mount packages, suitable for operation over the extended industrial temperature range of –40°C to +85°C.
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 | Continuous | 500mA | mA | ||
| Operating Temperature | –40°C | +85°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 | |
| Input Voltage Noise Density | f = 1kHz | 90nV/√Hz | nV/√Hz | ||
| Current Noise Density | f = 1kHz | 200fA/√Hz | fA/√Hz |
Key Features
- Wide Supply Range: Single supply: +8V to +60V, Dual supply: ±4V to ±30V
- High Output Current: 500mA Continuous
- Wide Output Voltage Swing:
- Fully Protected: Thermal Shutdown, Adjustable Current Limit
- Output Disable Control: Disables output stage and reduces quiescent current
- Thermal Shutdown Indicator: Monitors thermal shutdown status
- High Slew Rate: 6V/µs
- Low Quiescent Current:
- Packages: 7-Lead TO-220, 7-Lead DDPAK Surface-Mount
Applications
- Valve and Actuator Drivers
- Syncho and Servo Drivers
- Power Supplies
- Test Equipment
- Transducer Excitation
- Audio Amplifiers
Q & A
- What is the operating temperature range of the OPA547T-1?
The OPA547T-1 operates over the extended industrial temperature range of –40°C to +85°C.
- What are the supply voltage ranges for the OPA547T-1?
The OPA547T-1 can operate from single supplies (+8V to +60V) or dual supplies (±4V to ±30V).
- What is the maximum continuous output current of the OPA547T-1?
The maximum continuous output current is 500mA.
- How is the current limit adjusted in the OPA547T-1?
The current limit can be adjusted from 0mA to 750mA using a 0 to 150µA control signal connected to the ILIM pin. This can be done with a resistor/potentiometer or digitally with a voltage-out or current-out DAC.
- What is the function of the Enable/Status (E/S) pin?
The E/S pin disables the output stage and reduces quiescent current when pulled low. It also indicates thermal shutdown status when monitored.
- What packages are available for the OPA547T-1?
The OPA547T-1 is available in 7-lead TO-220 and 7-lead DDPAK surface-mount packages.
- How does the OPA547T-1 protect against over-temperature conditions?
The OPA547T-1 features thermal shutdown protection to prevent over-temperature conditions.
- Can the OPA547T-1 be used in single-supply configurations?
Yes, the OPA547T-1 can operate in single-supply configurations, and the input common-mode range extends below ground in such configurations.
- What are some typical applications of the OPA547T-1?
Typical applications include valve and actuator drivers, syncho and servo drivers, power supplies, test equipment, transducer excitation, and audio amplifiers.
- How does the OPA547T-1 handle output short-circuits?
The OPA547T-1 has a safe operating area (SOA) curve that defines the permissible range of voltage and current to prevent damage from output short-circuits. Additionally, clamp diodes can be used to protect against voltage exceeding power-supply voltage.
