Overview
The INA118UB/2K5, produced by Texas Instruments, is a low-power, general-purpose instrumentation amplifier known for its excellent accuracy and versatility. This device features a three op-amp design and is available in compact 8-pin plastic DIP and SO-8 surface-mount packages. It is designed to operate over a wide temperature range of –40°C to +85°C, making it suitable for various applications. The INA118UB/2K5 is laser-trimmed for low offset voltage, drift, and high common-mode rejection, ensuring high precision in signal amplification.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Offset Voltage (RTI) | ±50 | µV |
| Drift | 0.5 | µV/°C |
| Input Bias Current | 5 | nA |
| Common-Mode Rejection Ratio (CMRR) | 110 | dB (at G = 1000) |
| Input Protection | ±40 | V |
| Supply Voltage Range | ±2.25 to ±18 | V |
| Quiescent Current | 350 | µA |
| Bandwidth (at G = 100) | 70 kHz | |
| Operating Temperature Range | –40 to +85 | °C |
| Package Types | 8-Pin Plastic DIP, SO-8 |
Key Features
- Low offset voltage: 50 µV maximum
- Low drift: 0.5 µV/°C maximum
- Low input bias current: 5 nA maximum
- High common-mode rejection ratio (CMRR): 110 dB at G = 1000
- Inputs protected to ±40 V
- Wide supply range: ±2.25 to ±18 V
- Low quiescent current: 350 µA
- Single external resistor sets gain from 1 to 10,000
- Current-feedback input circuitry for wide bandwidth even at high gain
Applications
- Bridge Amplifiers
- Thermocouple Amplifiers
- RTD Sensor Amplifiers
- Medical Instrumentation
- Data Acquisition Systems
- Battery-operated systems
Q & A
- What is the maximum offset voltage of the INA118UB/2K5?
The maximum offset voltage is 50 µV.
- What is the drift specification of the INA118UB/2K5?
The drift is 0.5 µV/°C maximum.
- What is the input bias current of the INA118UB/2K5?
The input bias current is 5 nA maximum.
- What is the common-mode rejection ratio (CMRR) of the INA118UB/2K5?
The CMRR is 110 dB at G = 1000.
- How are the inputs of the INA118UB/2K5 protected?
The inputs are protected to ±40 V.
- What is the supply voltage range for the INA118UB/2K5?
The supply voltage range is ±2.25 to ±18 V.
- What is the quiescent current of the INA118UB/2K5?
The quiescent current is 350 µA.
- How is the gain of the INA118UB/2K5 set?
A single external resistor sets the gain from 1 to 10,000.
- What are the typical applications of the INA118UB/2K5?
Typical applications include bridge amplifiers, thermocouple amplifiers, RTD sensor amplifiers, medical instrumentation, and data acquisition systems.
- What are the available package types for the INA118UB/2K5?
The available package types are 8-Pin Plastic DIP and SO-8 surface-mount packages.
