Overview
The OPA2172IDRGT, part of the OPAx172 family, is a high-performance, 36-V, single-supply, low-noise operational amplifier produced by Texas Instruments. This device is designed to operate on supplies ranging from +4.5 V to +36 V (or ±2.25 V to ±18 V) and is known for its rail-to-rail output and high common-mode rejection ratio. The OPA2172IDRGT is particularly suited for applications requiring high accuracy and low noise, making it an excellent choice for various precision analog circuits.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage | +4.5 V | - | +36 V | V |
| Input Offset Voltage (VOS) | ±0.2 mV | - | ±1 mV | mV |
| Input Offset Drift (dVOS/dT) | ±0.3 µV/°C | - | ±1.8 µV/°C | µV/°C |
| Gain Bandwidth Product (GBP) | - | 10 MHz | - | MHz |
| Slew Rate (SR) | - | 10 V/µs | - | V/µs |
| Common-Mode Rejection Ratio (CMRR) | 90 dB | 104 dB | 120 dB | dB |
| Input Bias Current (IB) | ±8 pA | - | ±15 pA | pA |
| 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
- High common-mode rejection ratio (CMRR): up to 120 dB
- Low input bias current: ±8 pA
- Low offset voltage: ±0.2 mV
- Low offset drift: ±0.3 µV/°C
- Gain bandwidth product: 10 MHz
- Slew rate: 10 V/µs
- Industry-standard packages: SOIC-8, VSSOP-8, SOIC-14, TSSOP-14, and microPackages like SC70, SOT-23, WSON-8
Applications
- Tracking amplifiers in power modules
- Merchant power supplies
- Transducer amplifiers
- Bridge amplifiers
- Temperature measurements
- Strain gauge amplifiers
- Precision integrators
- Test equipment
Q & A
- What is the supply voltage range for the OPA2172IDRGT?
The supply voltage range is from +4.5 V to +36 V (or ±2.25 V to ±18 V).
- What is the typical input offset voltage of the OPA2172IDRGT?
The typical input offset voltage is ±0.2 mV.
- What is the gain bandwidth product of the OPA2172IDRGT?
The gain bandwidth product is 10 MHz.
- What is the slew rate of the OPA2172IDRGT?
The slew rate is 10 V/µs.
- What are the common package types available for the OPA2172IDRGT?
The device is available in SOIC-8, VSSOP-8, SOIC-14, TSSOP-14, and microPackages like SC70, SOT-23, WSON-8.
- What is the common-mode rejection ratio (CMRR) of the OPA2172IDRGT?
The CMRR is up to 120 dB.
- What are some typical applications of the OPA2172IDRGT?
Typical applications include tracking amplifiers in power modules, merchant power supplies, transducer amplifiers, bridge amplifiers, temperature measurements, strain gauge amplifiers, precision integrators, and test equipment.
- What is the input bias current of the OPA2172IDRGT?
The input bias current is ±8 pA.
- How does the OPA2172IDRGT perform in terms of noise?
The device has a low input voltage noise of 2.5 µVPP (0.1 Hz to 10 Hz) and an input voltage noise density of 12 nV/√Hz at 100 Hz.
- What is the settling time of the OPA2172IDRGT?
The settling time to 0.1% is specified under various conditions, typically around 10-V step at VS = ±18 V and G = +1.
