Overview
The OPA2171AIDCUR, produced by Texas Instruments, is part of the OPAx171 family of operational amplifiers. These devices are designed for general-purpose applications and offer high overall performance. They are specified for operation from 2.7V to 36V (±1.35V to ±18V) and are available in various packages, including the 8-pin SOIC and VSSOP configurations. The OPA2171AIDCUR is a dual-channel version, providing two independent operational amplifiers in a single package.
The OPA2171AIDCUR is notable for its low noise, low offset drift, and high common-mode rejection ratio (CMRR), making it suitable for a wide range of applications that require precision and stability. The device is stable with capacitive loads up to 300pF and features internal phase-reversal protection, ensuring that the output does not reverse into the opposite rail when the input is driven beyond the linear common-mode range.
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 0 | - | 40 | V |
| Input Voltage Range | V- - 0.5 | - | V+ + 0.5 | V |
| Operating Temperature | -40 | - | 125 | °C |
| Junction Temperature | - | - | 150 | °C |
| Low Noise | - | 14 nV/√Hz | - | nV/√Hz |
| Offset Drift | - | ±0.3 µV/°C | - | µV/°C |
| Gain Bandwidth | - | 3 MHz | - | MHz |
| Quiescent Current | - | 475 µA per amplifier | - | µA |
| Common-Mode Rejection Ratio (CMRR) | - | 120 dB | - | dB |
| Input Bias Current | - | 8 pA | - | pA |
Key Features
- Wide Supply Range: Operates from 2.7V to 36V (±1.35V to ±18V).
- Low Noise: 14 nV/√Hz at 1 kHz.
- Low Offset Drift: ±0.3 µV/°C.
- RFI Filtered Inputs: Reduces radio-frequency interference.
- Rail-to-Rail Output: Output voltage swing from rail to rail.
- High CMRR and PSRR: 120 dB CMRR and high power supply rejection ratio.
- Low Quiescent Current: 475 µA per amplifier.
- Phase-Reversal Protection: Prevents phase reversal when input is driven beyond the linear common-mode range.
- Stable with Capacitive Loads: Stable up to 300 pF capacitive loads.
Applications
- Tracking Amplifier in Power Modules: Used in power modules for precise tracking.
- Merchant Power Supplies: Suitable for use in commercial power supplies.
- Transducer Amplifiers: Ideal for amplifying signals from transducers.
- Bridge Amplifiers: Used in bridge configurations for precise measurement.
- Temperature Measurements: Used in temperature sensing applications.
- Strain Gauge Amplifiers: Suitable for strain gauge applications.
- Precision Integrators: Used in precision integration circuits.
- Battery-Powered Instruments: Suitable for battery-powered devices due to low quiescent current.
- Test Equipment: Used in various test and measurement equipment.
Q & A
- What is the supply voltage range of the OPA2171AIDCUR?
The OPA2171AIDCUR operates from 2.7V to 36V (±1.35V to ±18V).
- What is the typical noise level of the OPA2171AIDCUR?
The typical noise level is 14 nV/√Hz at 1 kHz.
- What is the offset drift of the OPA2171AIDCUR?
The offset drift is ±0.3 µV/°C.
- Does the OPA2171AIDCUR have phase-reversal protection?
Yes, it has internal phase-reversal protection.
- What is the gain bandwidth of the OPA2171AIDCUR?
The gain bandwidth is 3 MHz.
- What is the quiescent current per amplifier of the OPA2171AIDCUR?
The quiescent current per amplifier is 475 µA.
- What is the common-mode rejection ratio (CMRR) of the OPA2171AIDCUR?
The CMRR is 120 dB.
- Is the OPA2171AIDCUR stable with capacitive loads?
Yes, it is stable with capacitive loads up to 300 pF.
- What are some common applications of the OPA2171AIDCUR?
Common applications include tracking amplifiers, merchant power supplies, transducer amplifiers, bridge amplifiers, temperature measurements, strain gauge amplifiers, precision integrators, battery-powered instruments, and test equipment.
- What packages are available for the OPA2171AIDCUR?
The OPA2171AIDCUR is available in 8-pin SOIC and VSSOP packages.
