Overview
The OPA145IDGKR, produced by Texas Instruments, is a high-precision, low-noise operational amplifier that is part of the OPAx145 family. This device is renowned for its excellent bandwidth and slew-rate-to-power ratio, making it an ideal choice for amplifying small signals from high-impedance sensors. The OPA145IDGKR features a rail-to-rail output swing, which facilitates seamless integration with modern single-supply precision analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). Its low current noise and pico-ampere input bias current ensure high accuracy and reliability in various applications.
Key Specifications
| Parameter | Typical | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Gain Bandwidth Product | 5.5 | - | - | MHz |
| Slew Rate | 20 | - | - | V/μs |
| Quiescent Current (per amplifier) | 445 | - | 475 | μA |
| Supply Voltage (Dual Supply) | - | ±2.25 | ±18 | V |
| Supply Voltage (Single Supply) | - | 4.5 | 36 | V |
| Operating Temperature | - | -40 | 125 | °C |
| Input Bias Current | - | ±2 | ±10 | pA |
| Input Voltage Noise Density | 9 | - | - | nV/√Hz |
| Common-Mode Voltage Range | - | (V–) – 0.1 | (V+) – 3.5 | V |
| Open-Loop Gain | 123 | 118 | - | dB |
| Output Voltage Swing (RL = 10 kΩ) | - | (V–) + 0.1 | (V+) – 0.1 | V |
Key Features
- High gain bandwidth product of 5.5 MHz and a slew rate of 20 V/μs, providing excellent bandwidth and slew-rate-to-power ratio.
- Low supply current of 475 μA (maximum), making it a low-power solution.
- Rail-to-rail output swing, enabling compatibility with single-supply ADCs and DACs.
- Low current noise and pico-ampere input bias current, ideal for amplifying small signals from high-impedance sensors.
- Excellent drift and low offset voltage, ensuring high precision and stability.
- High common-mode rejection ratio (CMRR) of up to 140 dB.
Applications
The OPA145IDGKR is suitable for a variety of applications, including:
- High-precision measurement and instrumentation.
- Medical devices, such as ECG and EEG amplifiers.
- Industrial control systems and automation.
- Aerospace and defense systems requiring low noise and high precision.
- Transimpedance amplifiers in imaging applications.
Q & A
- What is the gain bandwidth product of the OPA145IDGKR?
The gain bandwidth product of the OPA145IDGKR is 5.5 MHz. - What is the slew rate of the OPA145IDGKR?
The slew rate of the OPA145IDGKR is 20 V/μs. - What is the typical quiescent current of the OPA145IDGKR?
The typical quiescent current of the OPA145IDGKR is 445 μA. - What is the input bias current range of the OPA145IDGKR?
The input bias current range of the OPA145IDGKR is ±2 to ±10 pA. - What is the common-mode voltage range of the OPA145IDGKR?
The common-mode voltage range of the OPA145IDGKR is from (V–) – 0.1 V to (V+) – 3.5 V. - What is the open-loop gain of the OPA145IDGKR?
The open-loop gain of the OPA145IDGKR is typically 123 dB. - What are the typical output voltage swing limits for the OPA145IDGKR?
The output voltage swing limits for the OPA145IDGKR are typically from (V–) + 0.1 V to (V+) – 0.1 V with a 10 kΩ load. - What are some common applications of the OPA145IDGKR?
The OPA145IDGKR is commonly used in high-precision measurement and instrumentation, medical devices, industrial control systems, aerospace and defense systems, and transimpedance amplifiers in imaging applications. - What is the operating temperature range of the OPA145IDGKR?
The operating temperature range of the OPA145IDGKR is from –40°C to 125°C. - What is the package type of the OPA145IDGKR?
The OPA145IDGKR is available in an 8-pin VSSOP package.
