Overview
The OPA445AP is a high-voltage FET-input operational amplifier manufactured by Texas Instruments. This monolithic operational amplifier is capable of operating from power supplies up to ±45V and can deliver output currents of up to 15mA. It is designed for applications requiring high output voltage or large common-mode voltage swings. The OPA445AP features a high slew rate of 15V/µs, which provides a wide power-bandwidth response, making it suitable for various high-voltage applications. The FET input circuitry allows the use of high-impedance feedback networks, minimizing output loading effects. Additionally, laser trimming of the input circuitry ensures low input offset voltage and drift.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Power Supply | ±50V | ||||
| Differential Input Voltage | ±80V | ||||
| Input Voltage Range | |±VS| –3V | ||||
| Operating Temperature Range | -55°C | 125°C | |||
| Input Offset Voltage (VOS) | VCM = 0, IO = 0 | ±1mV | ±3mV | ±5mV | mV |
| Input Bias Current | 10pA | pA | |||
| Slew Rate | 15V/µs | V/µs | |||
| Output Current | 15mA | ||||
| Package Types | TO-99, DIP-8, SO-8, SO-8 PowerPAD |
Key Features
- Wide-Power Supply Range: ±10V to ±45V
- High Slew Rate: 15V/µs, providing wide power-bandwidth response
- Low Input Bias Current: 10pA, suitable for high-impedance feedback networks
- Standard-Pinout Packages: Available in TO-99, DIP-8, SO-8, and SO-8 PowerPAD packages
- Offset Voltage Trim: Adjustable offset voltage trim connections on pins 1 and 5
Applications
- Test Equipment: Suitable for various test and measurement applications
- High-Voltage Regulators: Ideal for high-voltage regulation circuits
- Power Amplifiers: Used in power amplifier circuits requiring high output voltage
- Data Acquisition: Applicable in data acquisition systems
- Signal Conditioning: Useful in signal conditioning circuits
- Audio: Suitable for audio applications
- Piezo Drivers: Can be used to drive piezoelectric devices
Q & A
- What is the maximum power supply voltage for the OPA445AP?
The OPA445AP can operate from power supplies up to ±45V, or a total of 90V.
- What is the slew rate of the OPA445AP?
The slew rate of the OPA445AP is 15V/µs.
- What are the available package types for the OPA445AP?
The OPA445AP is available in TO-99, DIP-8, SO-8, and SO-8 PowerPAD packages.
- What is the input bias current of the OPA445AP?
The input bias current of the OPA445AP is 10pA.
- Can the OPA445AP be used in high-temperature environments?
The OPA445AP operates from -55°C to +125°C, making it suitable for a wide range of temperature environments.
- How can the offset voltage be adjusted in the OPA445AP?
The offset voltage can be adjusted using the offset voltage trim connections on pins 1 and 5.
- What are some common applications of the OPA445AP?
The OPA445AP is commonly used in test equipment, high-voltage regulators, power amplifiers, data acquisition, signal conditioning, audio, and piezo drivers.
- Is the OPA445AP sensitive to electrostatic discharge (ESD)?
Yes, the OPA445AP is sensitive to ESD and requires appropriate handling precautions to prevent damage.
- How can capacitive loads be managed with the OPA445AP?
Capacitive loads can be managed by using specific circuit configurations to preserve phase margin and prevent oscillations.
- What is the maximum junction temperature for the OPA445AP?
The maximum junction temperature for the OPA445AP is 150°C for the TO-99 package and 175°C for other packages.
