Overview
The OPA445AU is a monolithic operational amplifier produced by Texas Instruments. It is designed to operate from power supplies up to ±45V and can deliver output currents of 15mA. This amplifier is particularly useful in applications that require high output voltage or large common-mode voltage swings. The OPA445AU features a high slew rate of 15V/µs, which provides a wide power-bandwidth response, making it suitable for high-voltage applications. The FET input circuitry allows the use of high-impedance feedback networks, minimizing their output loading effects. Additionally, laser trimming of the input circuitry ensures low input offset voltage and drift.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Power Supply Range | ±10V to ±45V | V |
| Slew Rate | 15 V/µs | V/µs |
| Input Bias Current | 10 pA | pA |
| Gain Bandwidth Product | 2 MHz | MHz |
| Input Offset Voltage | ±1.5 mV | mV |
| Supply Current | 4.2 mA | mA |
| Output Current per Channel | 15 mA | mA |
| Operating Temperature Range | -25°C to +85°C (specified), -55°C to +125°C (operational) | °C |
| Package Type | 8-SOIC (0.154", 3.90mm Width) | |
| Mounting Type | Surface Mount |
Key Features
- Wide-Power Supply Range: Operates from ±10V to ±45V.
- High Slew Rate: 15V/µs, providing wide power-bandwidth response.
- Low Input Bias Current: 10 pA, suitable for high-impedance feedback networks.
- Standard Pinout Packages: Available in TO-99, DIP-8, SO-8 surface-mount, and SO-8 PowerPAD packages.
- Laser Trimming: Ensures low input offset voltage and drift.
Applications
- Test Equipment: Suitable for various testing applications due to its high voltage and current capabilities.
- High-Voltage Regulators: Ideal for regulating high-voltage power supplies.
- Power Amplifiers: Used in power amplifier circuits requiring high output voltage.
- Data Acquisition: Useful in data acquisition systems that need high precision and wide voltage range.
- Signal Conditioning: Effective in signal conditioning applications requiring high slew rates and low input bias current.
- Audio: Can be used in audio circuits that require high fidelity and wide dynamic range.
- Piezo Drivers: Suitable for driving piezoelectric devices due to its high voltage and current capabilities.
Q & A
- What is the maximum power supply range for the OPA445AU?
The OPA445AU can operate from power supplies up to ±45V.
- What is the slew rate of the OPA445AU?
The slew rate of the OPA445AU is 15V/µs.
- What is the input bias current of the OPA445AU?
The input bias current of the OPA445AU is 10 pA.
- What are the available package types for the OPA445AU?
The OPA445AU is available in TO-99, DIP-8, SO-8 surface-mount, and SO-8 PowerPAD packages.
- What is the operating temperature range for the OPA445AU?
The OPA445AU is specified to operate from -25°C to +85°C and can function from -55°C to +125°C.
- What is the gain bandwidth product of the OPA445AU?
The gain bandwidth product of the OPA445AU is 2 MHz).
- What is the maximum output current per channel for the OPA445AU?
The maximum output current per channel for the OPA445AU is 15 mA).
- Is the OPA445AU suitable for high-impedance feedback networks?
Yes, the OPA445AU is suitable for high-impedance feedback networks due to its FET input circuitry).
- What are some common applications of the OPA445AU?
The OPA445AU is commonly used in test equipment, high-voltage regulators, power amplifiers, data acquisition, signal conditioning, audio, and piezo drivers).
- Does the OPA445AU have any special thermal management features?
Yes, the SO-8 PowerPAD package of the OPA445AU is designed to reduce junction temperature).
