Overview
The OPA145IDBVR from Texas Instruments is a single, low-power, high-precision JFET input operational amplifier. It is part of the OPAx145 family, which is known for its excellent drift, low current noise, and pico-ampere input bias current. This amplifier is designed to amplify small signals from high-impedance sensors and is suitable for a wide range of applications due to its rail-to-rail output swing and single-supply or dual-supply operation capabilities.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Gain Bandwidth Product | 5.5 MHz | |
| Slew Rate | 20 V/μs | |
| Supply Voltage (Single Supply) | 4.5 V to 36 V | |
| Supply Voltage (Dual Supply) | ±2.25 V to ±18 V | |
| Quiescent Current (per amplifier) | 445 µA to 475 µA | |
| Input Bias Current | 2 pA | |
| Input Voltage Noise Density | 7 nV/√Hz | |
| Input Current Noise Density | 0.8 fA/√Hz | |
| Operating Temperature Range | -40°C to 125°C | |
| Package Type | SOT-23 (DBV) - 5 pins |
Key Features
- Best bandwidth and slew-rate-to-power ratio with a gain bandwidth product of 5.5 MHz and a slew rate of 20 V/μs.
- Low supply current: maximum of 475 µA.
- High precision with very low offset voltage (150 µV maximum) and low offset drift (1 µV/°C maximum).
- Low input bias current of 2 pA.
- Excellent noise performance with very low voltage noise (7 nV/√Hz) and current noise (0.8 fA/√Hz).
- Input-voltage range includes V– supply, allowing for single-supply operation.
- Rail-to-rail output swing, suitable for interfacing with modern single-supply precision ADCs and DACs.
Applications
The OPA145IDBVR is an excellent choice for various applications, including:
- Amplifying small signals from high-impedance sensors.
- Single-supply and dual-supply precision analog circuits.
- Interfacing with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs).
- Low-noise, low-power precision instrumentation.
Q & A
- What is the gain bandwidth product of the OPA145IDBVR?
The gain bandwidth product of the OPA145IDBVR is 5.5 MHz.
- What is the slew rate of the OPA145IDBVR?
The slew rate of the OPA145IDBVR is 20 V/μs.
- What are the supply voltage ranges for the OPA145IDBVR?
The OPA145IDBVR can operate on a single supply from 4.5 V to 36 V or on a dual supply from ±2.25 V to ±18 V.
- What is the typical quiescent current of the OPA145IDBVR?
The typical quiescent current of the OPA145IDBVR is between 445 µA and 475 µA.
- What is the input bias current of the OPA145IDBVR?
The input bias current of the OPA145IDBVR is 2 pA.
- What is the input voltage noise density of the OPA145IDBVR?
The input voltage noise density of the OPA145IDBVR is 7 nV/√Hz.
- What is the operating temperature range of the OPA145IDBVR?
The operating temperature range of the OPA145IDBVR is -40°C to 125°C.
- What package type is the OPA145IDBVR available in?
The OPA145IDBVR is available in a SOT-23 (DBV) package with 5 pins.
- What are some common applications for the OPA145IDBVR?
The OPA145IDBVR is commonly used for amplifying small signals from high-impedance sensors, in single-supply and dual-supply precision analog circuits, and for interfacing with ADCs and DACs.
- Is the OPA145IDBVR suitable for low-noise applications?
Yes, the OPA145IDBVR is suitable for low-noise applications due to its excellent noise performance.
