Overview
The OPA387DBVR, part of the OPAx387 family from Texas Instruments, is a high-precision, zero-drift operational amplifier. This device is engineered with state-of-the-art, proprietary zero-drift technology, offering ultra-low input offset voltage and drift. The OPA387 is designed for a wide range of general-purpose and precision applications, including electronic thermometers, weigh scales, temperature transmitters, and data acquisition systems. It operates from a single supply of 1.7 V to 5.5 V or dual supplies of ±0.85 V to ±2.75 V, making it versatile for various power configurations.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VS = 5.5 V | ±0.25 | - | ±2 | µV |
| Input Offset Voltage Drift (dVOS/dT) | TA = –40°C to +125°C | - | - | ±0.003 | µV/°C |
| Input Bias Current (IB) | TA = –40°C to +125°C | ±30 | - | ±150 | pA |
| Input Voltage Noise Density (eN) | f = 1 kHz | - | 8.5 | - | nV/√Hz |
| Common-Mode Voltage Range (VCM) | VS = 1.7 V to 5.5 V | - | - | ±100 mV beyond supply rails | mV |
| Gain Bandwidth | - | - | - | 5.7 MHz | - |
| Quiescent Current per Amplifier (IQ) | IO = 0 mA | 570 | - | 675 | µA |
| Short-Circuit Current (ISC) | VS = 5.5 V | ±55 | - | - | mA |
Key Features
- Ultra-low offset voltage: ±2 µV (maximum, tested).
- Zero drift: ±0.003 µV/°C.
- Low-input bias current: 150 pA (maximum, tested).
- Low noise: 8.5 nV/√Hz at 1 kHz, with no 1/f noise.
- Common-mode input range: ±100 mV beyond supply rails.
- Gain bandwidth: 5.7 MHz.
- Quiescent current: 570 µA per amplifier.
- Single and dual supply operation: 1.7 V to 5.5 V single supply, ±0.85 V to ±2.75 V dual supply.
- EMI and RFI filtered inputs: Internal low-pass filter for EMI reduction.
Applications
- Electronic thermometers: High precision temperature measurement.
- Weigh scales: Accurate weight measurement.
- Temperature transmitters: Reliable temperature signal transmission.
- Ventilators: Precise control and monitoring.
- Data acquisition (DAQ): High-fidelity analog signal processing.
- Semiconductor test: Precision testing and measurement.
- Lab and field instrumentation: General-purpose and precision measurement tools.
- Merchant network and server PSU: High-precision power supply monitoring.
- Analog input module: High-accuracy analog signal processing).
- Pressure transmitter: Precise pressure measurement and transmission).
Q & A
- What is the input offset voltage of the OPA387?
The input offset voltage of the OPA387 is ±2 µV (maximum, tested).
- What is the input bias current of the OPA387?
The input bias current of the OPA387 is 150 pA (maximum, tested)).
- What is the gain bandwidth of the OPA387?
The gain bandwidth of the OPA387 is 5.7 MHz).
- What is the quiescent current per amplifier for the OPA387?
The quiescent current per amplifier for the OPA387 is 570 µA).
- What is the common-mode input range of the OPA387?
The common-mode input range of the OPA387 is ±100 mV beyond the supply rails).
- Does the OPA387 have EMI and RFI protection?
Yes, the OPA387 has internal low-pass filters for EMI and RFI reduction).
- What are the typical applications of the OPA387?
The OPA387 is typically used in electronic thermometers, weigh scales, temperature transmitters, ventilators, and data acquisition systems, among others).
- What is the operating temperature range of the OPA387?
The operating temperature range of the OPA387 is –40°C to +125°C).
- Can the OPA387 operate on a single supply or dual supply?
Yes, the OPA387 can operate on a single supply from 1.7 V to 5.5 V or dual supplies from ±0.85 V to ±2.75 V).
- What is the noise performance of the OPA387?
The OPA387 has a noise spectral density of 8.5 nV/√Hz at 1 kHz and no 1/f noise).
