Overview
The OPA2172IDR is a part of the OPAx172 family of operational amplifiers produced by Texas Instruments. This device is a 36-V, single-supply, low-noise operational amplifier capable of operating on supplies ranging from +4.5 V (±2.25 V) to +36 V (±18 V). It features a JFET-input architecture, providing superior performance in terms of low noise, high common-mode rejection ratio, and low input bias current. The OPA2172IDR is designed for a wide range of applications requiring high precision and reliability.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Supply Voltage | +4.5 V to +36 V | +4.5 V | +36 V | V |
| Input Offset Voltage (VOS) | ±0.2 mV | ±0.2 mV | ±1 mV | mV |
| Input Offset Drift (dVOS/dT) | ±0.3 µV/°C | ±0.3 µV/°C | ±1.5 µV/°C | µV/°C |
| Gain Bandwidth Product (GBP) | 10 MHz | 10 MHz | - | MHz |
| Input Bias Current (IB) | ±8 pA | ±8 pA | ±15 pA | pA |
| Common-Mode Rejection Ratio (CMRR) | 120 dB | 90 dB | 120 dB | dB |
| Slew Rate (SR) | 10 V/µs | 10 V/µs | - | V/µs |
| Settling Time (to 0.1%) | - | - | 150 µs (for a 10-V step) | µs |
| Input Voltage Noise (en) | 2.5 µVPP (0.1 Hz to 10 Hz) | - | - | µVPP |
| Input Voltage Noise Density (en) | 12 nV/√Hz (at 100 Hz) | - | - | nV/√Hz |
Key Features
- Rail-to-Rail Output: The OPA2172IDR features a rail-to-rail output, allowing the output voltage to swing close to the supply rails.
- Low Noise: It has a low input voltage noise of 2.5 µVPP (0.1 Hz to 10 Hz) and a noise density of 12 nV/√Hz at 100 Hz.
- High Common-Mode Rejection Ratio (CMRR): The device offers a high CMRR of up to 120 dB, ensuring excellent common-mode rejection.
- Low Input Bias Current: The input bias current is as low as ±8 pA, which is beneficial for high-impedance sources.
- High Gain Bandwidth Product (GBP): With a GBP of 10 MHz, the OPA2172IDR is suitable for high-frequency applications.
- Industry-Standard Packages: Available in various packages such as SOIC-8, VSSOP-8, SOIC-14, TSSOP-14, and microPackages like SC70, SOT-23, and WSON-8.
Applications
- Tracking Amplifier in Power Modules: Used in power modules to track input signals accurately.
- Merchant Power Supplies: Suitable for use in power supply units due to its high voltage and current handling capabilities.
- Transducer Amplifiers: Ideal for amplifying signals from transducers in various measurement systems.
- Bridge Amplifiers: Used in bridge configurations for strain gauge and other bridge-type sensors.
- Temperature Measurements: Employed in temperature measurement circuits due to its low drift and high accuracy.
- Strain Gauge Amplifiers: Used to amplify signals from strain gauges in industrial and medical applications.
- Precision Integrators: Suitable for precision integration tasks in analog circuits.
- Test Equipment: Used in various test and measurement equipment due to its high precision and reliability.
Q & A
- What is the supply voltage range for the OPA2172IDR?
The OPA2172IDR can operate on supplies ranging from +4.5 V (±2.25 V) to +36 V (±18 V).
- What is the typical input offset voltage of the OPA2172IDR?
The typical input offset voltage is ±0.2 mV.
- What is the gain bandwidth product (GBP) of the OPA2172IDR?
The GBP is 10 MHz.
- What is the common-mode rejection ratio (CMRR) of the OPA2172IDR?
The CMRR is up to 120 dB.
- What are the available packages for the OPA2172IDR?
The device is available in SOIC-8, VSSOP-8, SOIC-14, TSSOP-14, and microPackages like SC70, SOT-23, and WSON-8.
- What is the typical slew rate of the OPA2172IDR?
The typical slew rate is 10 V/µs.
- What is the input bias current of the OPA2172IDR?
The input bias current is as low as ±8 pA.
- What are some common applications of the OPA2172IDR?
Common applications include tracking amplifiers in power modules, merchant power supplies, transducer amplifiers, bridge amplifiers, temperature measurements, strain gauge amplifiers, precision integrators, and test equipment.
- How does the OPA2172IDR handle capacitive loads?
The device can handle capacitive loads with the use of an isolation resistor to prevent oscillations.
- What is the settling time of the OPA2172IDR for a 10-V step?
The settling time to 0.1% is approximately 150 µs for a 10-V step.
