Overview
The OPA2387DGKR, 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 OPA2387 is a dual-channel amplifier, making it suitable for a wide range of general-purpose and precision applications. It operates from a single supply of 1.7 V to 5.5 V or a dual supply of ±0.85 V to ±2.75 V, and is unity-gain stable. The amplifier features a 5.7-MHz bandwidth, 8.5-nV/√Hz noise spectral density, and no 1/f noise, ensuring high fidelity and precision in various applications.
Key Specifications
| Parameter | Test Conditions | Min | 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 | ±0.012 | µV/°C |
| Input Bias Current (IB) | TA = –40°C to +125°C | ±30 | — | ±150 | pA |
| Input Offset Current (IOS) | TA = –40°C to +125°C | ±60 | — | ±300 | 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 | (V–) + 100 mV | — | (V+) – 100 mV | V |
| Gain Bandwidth Product | — | — | 5.7 | — | MHz |
| Quiescent Current per Amplifier (IQ) | IO = 0 mA, TA = –40°C to +125°C | 570 | — | 700 | 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, no 1/f noise
- Common-mode input range: ±100 mV beyond supply rails
- Gain bandwidth product: 5.7 MHz
- Quiescent current: 570 µA per amplifier
- Supply voltage range: Single supply: 1.7 V to 5.5 V, Dual supply: ±0.85 V to ±2.75 V
- EMI and RFI filtered inputs: Internal input low-pass filter for EMI rejection
Applications
- Electronic thermometer
- Weigh scale
- Temperature transmitter
- Ventilators
- Data acquisition (DAQ)
- Semiconductor test
- Lab and field instrumentation
- Merchant network and server PSU
- Analog input module
- Pressure transmitter
Q & A
- What is the input offset voltage of the OPA2387?
The input offset voltage of the OPA2387 is ±2 µV (maximum, tested).
- What is the input bias current of the OPA2387?
The input bias current of the OPA2387 is 150 pA (maximum, tested).
- What is the gain bandwidth product of the OPA2387?
The gain bandwidth product of the OPA2387 is 5.7 MHz.
- What is the quiescent current per amplifier for the OPA2387?
The quiescent current per amplifier for the OPA2387 is 570 µA.
- What is the supply voltage range for the OPA2387?
The OPA2387 operates from a single supply of 1.7 V to 5.5 V or a dual supply of ±0.85 V to ±2.75 V.
- Does the OPA2387 have EMI and RFI protection?
Yes, the OPA2387 has internal input low-pass filters for EMI and RFI rejection.
- What are some common applications of the OPA2387?
The OPA2387 is commonly used in electronic thermometers, weigh scales, temperature transmitters, ventilators, data acquisition systems, semiconductor testing, lab and field instrumentation, and more.
- What is the common-mode input range of the OPA2387?
The common-mode input range of the OPA2387 extends ±100 mV beyond the supply rails.
- How does the OPA2387 handle noise?
The OPA2387 features low noise with 8.5 nV/√Hz at 1 kHz and no 1/f noise.
- What is the operating temperature range of the OPA2387?
The OPA2387 is specified over the industrial temperature range of –40°C to +125°C.
