Overview
The OPA177GS/2K5 is a precision bipolar operational amplifier produced by Texas Instruments. This device is renowned for its very low offset voltage and drift, making it an excellent choice for a wide range of precision instrumentation applications. The OPA177GS/2K5 features laser-trimmed offset and drift, which virtually eliminate the need for costly external trimming. It is unity-gain stable, ensuring ease of use and freedom from oscillations in various circuit configurations. The low quiescent current and high open-loop gain of this amplifier contribute to its high performance and low cost, making it a preferred option in many industrial and laboratory settings.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Offset Voltage (VOS) | ±10 | ±25 | ±40 | µV |
| Input Offset Voltage Drift (dVOS/dT) | ±0.1 | ±0.3 | ±1.2 | µV/°C |
| Open-Loop Gain (AOL) | 134 | 141 | - | dB |
| Quiescent Current | - | 1.3 | 2.5 | mA |
| Input Bias Current | - | - | ±2 | nA |
| Supply Voltage Range | 6 | - | 36 | V |
| Common-Mode Rejection Ratio (CMRR) | 110 | - | 140 | dB |
| Closed-Loop Bandwidth (BWCL) | 0.4 | - | 0.6 | MHz |
| Slew Rate | 0.1 | - | 0.3 | V/µs |
Key Features
- Low offset voltage: up to ±25 µV (max)
- Low offset voltage drift: up to ±0.3 µV/°C (max)
- High open-loop gain: minimum of 134 dB
- Low quiescent current: typically 1.3 mA
- Low input bias current: up to ±2 nA (max)
- Wide supply voltage range: 6 V to 36 V
- Unity-gain stable
- Laser-trimmed offset and drift
- No need for external trimming
- Input bias current cancellation
- Available in 8-pin plastic DIP and SO-8 surface-mount packages
Applications
- Analog input modules
- Data acquisition (DAQ)
- Battery test
- Lab and field instrumentation
- Temperature transmitters
Q & A
- What is the typical input offset voltage of the OPA177GS/2K5?
The typical input offset voltage is ±25 µV.
- What is the maximum input offset voltage drift of the OPA177GS/2K5?
The maximum input offset voltage drift is ±0.3 µV/°C.
- What is the minimum open-loop gain of the OPA177GS/2K5?
The minimum open-loop gain is 134 dB.
- What is the typical quiescent current of the OPA177GS/2K5?
The typical quiescent current is 1.3 mA.
- What is the maximum input bias current of the OPA177GS/2K5?
The maximum input bias current is ±2 nA.
- What is the supply voltage range of the OPA177GS/2K5?
The supply voltage range is from 6 V to 36 V.
- Is the OPA177GS/2K5 unity-gain stable?
- What are the available package options for the OPA177GS/2K5?
The OPA177GS/2K5 is available in 8-pin plastic DIP and SO-8 surface-mount packages.
- What are some common applications of the OPA177GS/2K5?
- How can the input bias current be managed in the OPA177GS/2K5?
The input bias current is internally compensated with an equal and opposite cancellation current, which minimizes the residual input bias current.
