Overview
The OPA2145IDR is a high-precision, low-noise JFET operational amplifier produced by Texas Instruments. This dual-channel op-amp is designed for applications requiring high accuracy and low noise, making it ideal for handling small signals. It features a 5.5 MHz bandwidth, a 20 V/μs slew rate, and a low input voltage noise density of 7 nV/√Hz. The OPA2145IDR is suitable for a wide range of operating conditions and is available in various package options, including the SOIC-8 and VSSOP-8 packages.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (Dual Supply) | ±2.25 | - | ±18 | V |
| Supply Voltage (Single Supply) | 4.5 | - | 36 | V |
| Operating Temperature | -40 | - | 125 | °C |
| Bandwidth | - | 5.5 | - | MHz |
| Slew Rate | - | 20 | - | V/μs |
| Input Voltage Noise Density | - | 7 | - | nV/√Hz |
| Input Bias Current | ±2 | - | ±10 | pA |
| Quiescent Current (per amplifier) | 445 | 475 | 590 | µA |
| Open-Loop Gain | 114 | 123 | - | dB |
| Common-Mode Rejection Ratio (CMRR) | 118 | 140 | - | dB |
| Output Voltage Swing (RL = 10 kΩ) | (V–) + 0.1 | - | (V+) – 0.1 | V |
Key Features
- High-precision JFET input stage for low noise and high input impedance.
- Rail-to-rail output for maximum signal swing.
- Low input voltage noise density of 7 nV/√Hz.
- High bandwidth of 5.5 MHz and slew rate of 20 V/μs.
- Excellent common-mode rejection ratio (CMRR) of up to 140 dB.
- Wide operating supply voltage range from ±2.25 V to ±18 V.
- Low quiescent current of 445 µA per amplifier.
- Available in SOIC-8 and VSSOP-8 packages.
Applications
- High-precision instrumentation and measurement systems.
- Medical devices requiring low noise and high accuracy.
- Audio and video equipment where signal fidelity is critical.
- Industrial control systems and automation.
- Imaging and spectroscopy applications, such as fully differential transimpedance amplifiers.
Q & A
- What is the bandwidth of the OPA2145IDR?
The bandwidth of the OPA2145IDR is 5.5 MHz.
- What is the slew rate of the OPA2145IDR?
The slew rate of the OPA2145IDR is 20 V/μs.
- What is the input voltage noise density of the OPA2145IDR?
The input voltage noise density of the OPA2145IDR is 7 nV/√Hz.
- What is the common-mode rejection ratio (CMRR) of the OPA2145IDR?
The CMRR of the OPA2145IDR is up to 140 dB.
- What are the operating supply voltage ranges for the OPA2145IDR?
The OPA2145IDR operates with supply voltages ranging from ±2.25 V to ±18 V.
- What is the quiescent current per amplifier for the OPA2145IDR?
The quiescent current per amplifier for the OPA2145IDR is 445 µA.
- In what packages is the OPA2145IDR available?
The OPA2145IDR is available in SOIC-8 and VSSOP-8 packages.
- What are some typical applications for the OPA2145IDR?
The OPA2145IDR is typically used in high-precision instrumentation, medical devices, audio and video equipment, industrial control systems, and imaging applications.
- What is the input bias current of the OPA2145IDR?
The input bias current of the OPA2145IDR is ±2 pA to ±10 pA.
- What is the output voltage swing range for the OPA2145IDR with a 10 kΩ load?
The output voltage swing range for the OPA2145IDR with a 10 kΩ load is from (V–) + 0.1 V to (V+) – 0.1 V.
