Overview
The OPA445AU/2K5 is a high-voltage FET-input operational amplifier produced by Texas Instruments. This monolithic operational amplifier is designed to operate from power supplies up to ±45V and can handle output currents of up to 15mA. It is particularly useful in applications requiring high output voltage or large common-mode voltage swings. The OPA445AU/2K5 features a high slew rate of 15V/µs, low input bias current of 10pA, and a wide power-bandwidth response, making it suitable for a variety of high-voltage applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Offset Voltage (VOS) | ±1 | ±3 | ±5 | mV |
| Input Bias Current (IB) | ±10 | ±50 | ±100 | pA |
| Common-Mode Voltage Range (VCM) | (V−) + 5 | (V+) - 5 | V | |
| Open-Loop Voltage Gain (AOL) | 100 | 110 | dB | |
| Gain Bandwidth Product (GBW) | 2 | MHz | ||
| Slew Rate (SR) | 15 | V/µs | ||
| Output Voltage (VO) | (V−) + 5 | (V+) - 5 | V | |
| Output Current (IO) | ±15 | mA | ||
| Operating Temperature Range | −55 | +125 | °C | |
| Power Supply Range | ±10 | ±45 | V |
Key Features
- High slew rate of 15V/µs for wide power-bandwidth response.
- Low input bias current of 10pA, suitable for high-impedance feedback networks.
- Laser-trimmed input circuitry for low input offset voltage and drift.
- Wide power supply range from ±10V to ±45V.
- Available in various packages including TO-99, DIP-8, SO-8, and SO-8 PowerPAD for enhanced thermal performance.
- Offset voltage trim connections for adjusting offset voltage.
- Capable of driving large capacitive loads with proper circuit design.
Applications
- Test equipment.
- High-voltage regulators.
- Power amplifiers.
- Data acquisition and signal conditioning.
- Audio applications, including piezo drivers.
- Non-inverting and other standard op-amp configurations.
Q & A
- What is the maximum power supply voltage for the OPA445AU/2K5? The OPA445AU/2K5 can operate from power supplies up to ±45V, or a total of 90V.
- What is the slew rate of the OPA445AU/2K5? The slew rate is 15V/µs.
- What is the input bias current of the OPA445AU/2K5? The input bias current is ±10pA.
- What are the available packages for the OPA445AU/2K5? The OPA445AU/2K5 is available in TO-99, DIP-8, SO-8, and SO-8 PowerPAD packages.
- How can the offset voltage be adjusted on the OPA445AU/2K5? The offset voltage can be adjusted using the offset voltage trim connections on pins 1 and 5.
- What is the maximum output current of the OPA445AU/2K5? The maximum output current is ±15mA.
- How can the OPA445AU/2K5 handle large capacitive loads? The OPA445AU/2K5 can handle large capacitive loads by using a circuit that preserves phase margin, as shown in the datasheet.
- What is the operating temperature range of the OPA445AU/2K5? The operating temperature range is from −55°C to +125°C.
- How does the SO-8 PowerPAD package enhance thermal performance? The SO-8 PowerPAD package has an exposed leadframe that can be soldered directly to the PCB, significantly reducing thermal resistance and enhancing power dissipation capability.
- Can the OPA445AU/2K5 be used in non-inverting amplifier configurations? Yes, the OPA445AU/2K5 can be used in virtually any op-amp configuration, including non-inverting amplifiers.
