Overview
The OPA2172IDGKR is a high-performance, single-supply operational amplifier from Texas Instruments. It is part of the OPAx172 family, which includes the OPA172 and OPA4172. This amplifier is designed for operation on supplies ranging from +4.5 V to +36 V (or ±2.25 V to ±18 V) and is known for its low noise, high common-mode rejection ratio, and rail-to-rail output.
The OPA2172IDGKR is particularly suited for applications requiring high accuracy and stability over a wide range of operating conditions. Its compact package options, such as the VSSOP-8, make it ideal for space-constrained designs.
Key Specifications
| Parameter | Min | Typ | Max | 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
- Low offset voltage: ±0.2 mV
- Low offset drift: ±0.3 µV/°C
- High gain bandwidth product: 10 MHz
- Low input bias current: ±8 pA
- Rail-to-rail output
- High common-mode rejection ratio: up to 120 dB
- 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 operating supply voltage range for the OPA2172IDGKR?
The OPA2172IDGKR operates on supplies ranging from +4.5 V to +36 V (or ±2.25 V to ±18 V).
- What is the typical input offset voltage of the OPA2172IDGKR?
The typical input offset voltage is ±0.2 mV.
- What is the gain bandwidth product of the OPA2172IDGKR?
The gain bandwidth product is 10 MHz.
- What are the common package options for the OPA2172IDGKR?
The OPA2172IDGKR is available in packages such as SOIC-8, VSSOP-8, SOIC-14, TSSOP-14, and microPackages like SC70, SOT-23, WSON-8.
- What is the slew rate of the OPA2172IDGKR?
The slew rate is 10 V/µs.
- What is the common-mode rejection ratio (CMRR) of the OPA2172IDGKR?
The CMRR is up to 120 dB.
- What are some typical applications for the OPA2172IDGKR?
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 OPA2172IDGKR?
The input bias current is ±8 pA.
- Does the OPA2172IDGKR have rail-to-rail output capability?
Yes, the OPA2172IDGKR has rail-to-rail output capability.
- What is the input voltage noise density of the OPA2172IDGKR at 100 Hz?
The input voltage noise density at 100 Hz is 12 nV/√Hz.
