Overview
The OPA172IDCKR, part of the OPAx172 family, is a high-performance, single-supply, low-noise operational amplifier produced by Texas Instruments. This amplifier is designed to operate over a wide range of supply voltages from +4.5 V to +36 V (or ±2.25 V to ±18 V) and is known for its low offset voltage, low noise, and high common-mode rejection ratio. The OPA172IDCKR is particularly suited for applications requiring precision and stability in various industrial and commercial environments.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Offset Voltage (VOS) | TA = +25°C, VS = ±2.25 V to ±18 V | ±0.2 | ±1 | mV | |
| Offset Drift (dVOS/dT) | TA = –40°C to +125°C | ±0.3 | ±1.5 | µV/°C | |
| Input Bias Current (IB) | TA = +25°C, VS = ±2.25 V to ±18 V | ±8 | ±15 | pA | |
| Common-Mode Rejection Ratio (CMRR) | VS = ±2.25 V, (V–) – 0.1 V < VCM < (V+) – 2 V | 90 | 104 | dB | |
| Gain Bandwidth Product (GBP) | TA = +25°C | 10 | MHz | ||
| Slew Rate (SR) | G = +1 | 10 | V/µs | ||
| Input Voltage Noise (En) | f = 0.1 Hz to 10 Hz | 2.5 | µVPP | ||
| Input Voltage Noise Density (en) | f = 100 Hz | 12 | nV/√Hz | ||
| Package | SC70-5 |
Key Features
- Low Offset Voltage and Drift: ±0.2 mV and ±0.3 µV/°C, respectively, ensuring high precision.
- High Common-Mode Rejection Ratio: Up to 120 dB, providing excellent rejection of common-mode signals.
- Rail-to-Rail Output: The output voltage can swing to within a few millivolts of the supply rails.
- Low Input Bias Current: ±8 pA, minimizing the impact on the input signal.
- High Gain Bandwidth Product: 10 MHz, suitable for high-frequency applications.
- Low Noise: Input voltage noise of 2.5 µVPP and noise density of 12 nV/√Hz at 100 Hz.
- Compact Packages: Available in SC70-5, among other packages, for space-efficient designs.
Applications
- Tracking Amplifier in Power Modules: For precise voltage tracking and regulation.
- Merchant Power Supplies: Enhancing the performance of power supply units.
- Transducer Amplifiers: Amplifying signals from various transducers.
- Bridge Amplifiers: Used in bridge configurations for strain gauges and other sensors.
- Temperature Measurements: For accurate temperature sensing and amplification.
- Strain Gauge Amplifiers: In applications requiring precise strain measurements.
- Precision Integrators: For integrating signals in precision circuits.
- Test Equipment: In various test and measurement instruments.
Q & A
- What is the operating supply voltage range for the OPA172IDCKR?
The OPA172IDCKR operates on supply voltages ranging from +4.5 V to +36 V (or ±2.25 V to ±18 V).
- What is the typical offset voltage of the OPA172IDCKR?
The typical offset voltage is ±0.2 mV.
- What is the common-mode rejection ratio (CMRR) of the OPA172IDCKR?
The CMRR is up to 120 dB.
- What is the gain bandwidth product (GBP) of the OPA172IDCKR?
The GBP is 10 MHz.
- What is the slew rate of the OPA172IDCKR?
The slew rate is 10 V/µs.
- What are the typical applications of the OPA172IDCKR?
It is used in tracking amplifiers, power supplies, transducer amplifiers, bridge amplifiers, temperature measurements, strain gauge amplifiers, precision integrators, and test equipment.
- What package options are available for the OPA172IDCKR?
The OPA172IDCKR is available in the SC70-5 package, among others.
- What is the input bias current of the OPA172IDCKR?
The input bias current is ±8 pA.
- How does the OPA172IDCKR perform in terms of noise?
The OPA172IDCKR has an input voltage noise of 2.5 µVPP and a noise density of 12 nV/√Hz at 100 Hz.
- Is the OPA172IDCKR suitable for high-frequency applications?
Yes, with a gain bandwidth product of 10 MHz, it is suitable for high-frequency applications.
