Overview
The OPA4180 operational amplifier from Texas Instruments is a high-precision, zero-drift op amp designed for applications requiring low offset voltage and minimal drift over time and temperature. This quad-channel op amp utilizes TI's proprietary zero-drift techniques to offer excellent DC precision and low noise performance. It is available in SOIC-14 and TSSOP-14 packages, making it suitable for a variety of precision analog circuits.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage (VIO) | TA = 25°C | 15 | - | 75 | μV |
| Input Offset Voltage Drift (dVIO/dT) | TA = –40°C to +125°C | - | 0.1 | 0.35 | μV/°C |
| Power Supply Rejection Ratio (PSRR) | VS = 4 V to 36 V, VCM = VS / 2 | - | - | 126 dB | - |
| Common Mode Rejection Ratio (CMRR) | VS = 4 V to 36 V, VCM = VS / 2 | - | - | 114 dB | - |
| Open-Loop Gain (AOL) | - | - | - | 120 dB | - |
| Quiescent Current (IQ) | TA = 25°C, IO = 0 mA | 450 | - | 525 | μA |
| Operating Voltage Range (VS) | - | ±2 V (or 4 V) | - | ±18 V (or 36 V) | V |
| Output Voltage Swing from Rail | No load, RL = 10 kΩ | 8 mV | - | 18 mV | - |
| Short-Circuit Current (IOS) | - | - | - | ±18 mA | - |
| Operating Temperature Range | - | -40°C | - | +125°C | °C |
Key Features
- Low Offset Voltage: 75 μV (Maximum)
- Zero-Drift: 0.1 μV/°C
- Low Noise: 10 nV/√Hz
- Very Low 1/f Noise
- Excellent DC Precision:
- PSRR: 126 dB
- CMRR: 114 dB
- Open-Loop Gain (AOL): 120 dB
- Quiescent Current: 525 μA (Maximum)
- Wide Supply Range: ±2 V to ±18 V
- Rail-to-Rail Output: Includes Negative Rail
- Low Bias Current: 250 pA (Typical)
- RFI Filtered Inputs
- MicroSIZE Packages
Applications
- Bridge Amplifiers
- Strain Gauges
- Test Equipment
- Transducer Applications
- Temperature Measurement
- Electronic Scales
- Medical Instrumentation
- Resistor Thermal Detectors
- Precision Active Filters
Q & A
- What is the maximum input offset voltage of the OPA4180?
The maximum input offset voltage is 75 μV.
- What is the input offset voltage drift over temperature for the OPA4180?
The input offset voltage drift is 0.1 μV/°C.
- What is the power supply rejection ratio (PSRR) of the OPA4180?
The PSRR is 126 dB.
- What is the common mode rejection ratio (CMRR) of the OPA4180?
The CMRR is 114 dB.
- What is the quiescent current of the OPA4180?
The quiescent current is 525 μA (Maximum).
- What is the operating voltage range of the OPA4180?
The operating voltage range is ±2 V to ±18 V (or 4 V to 36 V).
- What is the output voltage swing from the rail for the OPA4180?
The output voltage swing from the rail is within 8 mV to 18 mV.
- What is the short-circuit current of the OPA4180?
The short-circuit current is ±18 mA.
- What is the operating temperature range of the OPA4180?
The operating temperature range is –40°C to +125°C.
- In what packages is the OPA4180 available?
The OPA4180 is available in SOIC-14 and TSSOP-14 packages.
