Overview
The OPA2188 operational amplifier from Texas Instruments is a high-precision, low-noise device that utilizes TI's proprietary auto-zeroing techniques. This amplifier is designed to offer low offset voltage (maximum of 25 μV) and near zero-drift over time and temperature, making it ideal for applications requiring high DC precision. The OPA2188 features a wide supply range of ±2 V to ±18 V, rail-to-rail output, and RFI filtered inputs. It is available in MSOP-8 and SO-8 packages and is specified for operation from –40°C to +105°C.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Offset Voltage (VOS) | 6 | 25 | 25 | μV |
| Offset Voltage Drift | 0.03 | 0.085 | 0.085 | μV/°C |
| Power-Supply Rejection Ratio (PSRR) | 130 | 146 | 146 | dB |
| Common-Mode Rejection Ratio (CMRR) | 120 | 126 | 126 | dB |
| Open-Loop Gain (AOL) | 120 | 136 | 136 | dB |
| Gain-Bandwidth Product (GBW) | 2 | 2 | 2 | MHz |
| Slew Rate (SR) | 0.8 | 0.8 | 0.8 | V/μs |
| Quiescent Current (IQ) | 415 | 510 | 600 | μA |
| Operating Voltage Range (VS) | ±2 V to ±18 V | V | ||
| Output Voltage Swing from Rail | 6 | 15 | 15 | mV |
| Short-Circuit Current (ISC) | ±18 | mA | ||
| Operating Temperature Range (TA) | –40°C | +105°C | °C |
Key Features
- Low offset voltage (maximum of 25 μV) and near zero-drift over time and temperature.
- High DC precision with PSRR of 142 dB and CMRR of 146 dB.
- Rail-to-rail output swing within 15 mV of the rails.
- RFI filtered inputs.
- Wide supply range: ±2 V to ±18 V (single or dual supplies).
- Low quiescent current: maximum of 600 μA.
- High input impedance.
- Available in MSOP-8 and SO-8 packages.
- Specified for operation from –40°C to +105°C.
Applications
- Bridge amplifiers.
- Strain gauges.
- Test equipment.
- Transducer applications.
- Temperature measurement.
- Electronic scales.
- Medical instrumentation.
- Resistance temperature detectors (RTDs).
- Precision active filters.
Q & A
- What is the maximum input offset voltage of the OPA2188?
The maximum input offset voltage of the OPA2188 is 25 μV.
- What is the typical power-supply rejection ratio (PSRR) of the OPA2188?
The typical PSRR of the OPA2188 is 146 dB.
- What is the gain-bandwidth product (GBW) of the OPA2188?
The GBW of the OPA2188 is 2 MHz.
- What is the slew rate (SR) of the OPA2188?
The slew rate of the OPA2188 is 0.8 V/μs.
- What is the quiescent current (IQ) of the OPA2188?
The maximum quiescent current of the OPA2188 is 600 μA.
- What is the operating voltage range of the OPA2188?
The operating voltage range of the OPA2188 is ±2 V to ±18 V.
- What are the typical applications of the OPA2188?
The OPA2188 is typically used in bridge amplifiers, strain gauges, test equipment, transducer applications, temperature measurement, electronic scales, medical instrumentation, RTDs, and precision active filters.
- What are the available package types for the OPA2188?
The OPA2188 is available in MSOP-8 and SO-8 packages.
- What is the specified temperature range for the OPA2188?
The specified temperature range for the OPA2188 is from –40°C to +105°C.
- Does the OPA2188 have RFI filtered inputs?
Yes, the OPA2188 has RFI filtered inputs.
