Overview
The OPA2187IDGKT, produced by Texas Instruments, is a high-precision, low-quiescent current operational amplifier. This device is part of the OPAx187 series, which utilizes auto-zeroing techniques to provide low offset voltage and near zero drift over time and temperature. The OPA2187 is designed for applications requiring high accuracy and low power consumption, offering rail-to-rail output swing and high-input impedance. It is available in microsize packages, including 8-pin VSSOP and 8-pin SOIC, and is specified for operation from –40°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Offset Voltage (VOS) | ±1 (typ), ±10 (max) | µV |
| Offset Voltage Drift | 0.001 (typ), 0.005 (max) | µV/°C |
| Noise | 15 (typ), 20 (max) | nV/√Hz |
| Power Supply Rejection Ratio (PSRR) | 160 | dB |
| Common Mode Rejection Ratio (CMRR) | 140 | dB |
| Open Loop Gain (AOL) | 160 | dB |
| Quiescent Current (IQ) | 100 (typ), 145 (max) | µA |
| Supply Voltage Range | ±2.25 V to ±18 V | V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Type | 8-pin VSSOP, 8-pin SOIC |
Key Features
- Low offset voltage: 10 µV (maximum)
- Zero drift: 0.001 µV/°C (typical)
- Low noise: 15 nV/√Hz (typical)
- High PSRR and CMRR: 160 dB and 140 dB respectively
- Low quiescent current: 100 µA (typical)
- Wide supply voltage range: ±2.25 V to ±18 V
- Rail-to-rail output operation
- Input includes negative rail
- Low bias current: 100 pA (typical)
- EMI filtered inputs
- Microsize packages
Applications
- Bridge amplifier
- Strain gauge
- Test and measurement equipment
- Transducer applications
- Temperature measurement
- Electronic scales
- Medical instrumentation
- RTD amplifier
- Precision active filters
- Low-side current monitoring
Q & A
- What is the typical input offset voltage of the OPA2187?
The typical input offset voltage is ±1 µV, with a maximum of ±10 µV.
- What is the offset voltage drift of the OPA2187?
The offset voltage drift is typically 0.001 µV/°C, with a maximum of 0.005 µV/°C.
- What is the noise level of the OPA2187?
The noise level is typically 15 nV/√Hz, with a maximum of 20 nV/√Hz.
- What is the power supply rejection ratio (PSRR) of the OPA2187?
The PSRR is 160 dB.
- What is the common mode rejection ratio (CMRR) of the OPA2187?
The CMRR is 140 dB.
- What is the quiescent current of the OPA2187?
The quiescent current is typically 100 µA, with a maximum of 145 µA.
- What is the supply voltage range for the OPA2187?
The supply voltage range is ±2.25 V to ±18 V.
- What are the available package types for the OPA2187?
The OPA2187 is available in 8-pin VSSOP and 8-pin SOIC packages.
- What is the operating temperature range for the OPA2187?
The operating temperature range is –40°C to +125°C.
- What are some common applications of the OPA2187?
Common applications include bridge amplifiers, strain gauges, test and measurement equipment, transducer applications, temperature measurement, electronic scales, medical instrumentation, RTD amplifiers, precision active filters, and low-side current monitoring.
