Overview
The OPA548T device, produced by Texas Instruments, is a low-cost, high-voltage, and high-current operational amplifier. It is designed to drive a wide variety of loads with excellent low-level signal accuracy and high-output voltage and current. The amplifier operates from either single or dual supplies, offering design flexibility. In single-supply operation, the input common-mode range extends below ground. The OPA548T is internally protected against overtemperature conditions and current overloads, and it features an adjustable current limit and output disable control.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | TO-220 (KC), DDPAK |
| Pins | 7 |
| Operating Temperature Range (°C) | -40 to 85 |
| Supply Voltage (Single Supply) | 8 V to 60 V |
| Supply Voltage (Dual Supply) | ±4 V to ±30 V |
| Output Current (Continuous) | 3 A |
| Output Current (Peak) | 5 A |
| Slew Rate (Typical) | 10 V/μs |
| Input Bias Current (Maximum) | 500 nA |
| Quiescent Current per Channel (Typical) | 17 mA |
| Common Mode Rejection Ratio (Typical) | 95 dB |
| Gain Bandwidth Product (Typical) | 1 MHz |
| Offset Voltage at 25°C (Maximum) | 10 mV |
Key Features
- Wide supply range: Single supply from 8 V to 60 V, dual supply from ±4 V to ±30 V
- High-output current: 3 A continuous, 5 A peak
- Wide output voltage swing
- Fully protected: Thermal shutdown, adjustable current limit, output disable control, and thermal shutdown indicator
- High slew rate: 10 V/μs
- Low quiescent current
- Packages: 7-lead TO-220 (zip and straight leads), 7-lead DDPAK surface-mount
- Adjustable current limit from 0 A to 5 A with external resistor or digitally controlled
- Enable/Status (E/S) pin for output disable and thermal shutdown monitoring
Applications
The OPA548T is suitable for a variety of applications requiring high-voltage and high-current drive capabilities, such as:
- Industrial control systems
- Motor control and drive systems
- Power supplies and voltage regulators
- Audio and professional sound equipment
- Medical devices requiring high current and voltage accuracy
Q & A
- What is the operating temperature range of the OPA548T?
The OPA548T operates over an extended industrial temperature range of -40°C to 85°C.
- What are the supply voltage ranges for the OPA548T?
The OPA548T can operate from a single supply of 8 V to 60 V or a dual supply of ±4 V to ±30 V.
- What is the maximum output current of the OPA548T?
The OPA548T can deliver up to 3 A continuous and 5 A peak output current.
- How is the current limit adjusted on the OPA548T?
The current limit can be adjusted from 0 A to 5 A using an external resistor and potentiometer or digitally controlled with a voltage-out or current-out DAC.
- What protection features does the OPA548T have?
The OPA548T is fully protected with thermal shutdown, adjustable current limit, output disable control, and a thermal shutdown indicator.
- What packages are available for the OPA548T?
The OPA548T is available in 7-lead TO-220 (zip and straight leads) and 7-lead DDPAK surface-mount packages.
- How does the Enable/Status (E/S) pin function?
The E/S pin disables the output stage and reduces quiescent current when set low, and it can be monitored to determine if the device is in thermal shutdown.
- What is the slew rate of the OPA548T?
The slew rate of the OPA548T is 10 V/μs.
- Is the OPA548T RoHS compliant?
Yes, the OPA548T is RoHS compliant.
- What is the typical quiescent current per channel for the OPA548T?
The typical quiescent current per channel is 17 mA.
