Overview
The INA118UBG4, produced by Texas Instruments, is a precision, low-power instrumentation amplifier. This device is designed for high accuracy and low power consumption, making it suitable for a wide range of applications. The INA118 features a versatile three op-amp design and small size, which are advantageous for various uses. It operates with a wide supply range from ±2.25 V to ±18 V and has a low quiescent current of 350 µA, making it an excellent choice for battery-operated systems.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage | ±2.25 | - | ±18 | V |
| Analog Input Voltage | - | - | ±40 | V |
| Offset Voltage (RTI) | - | ±10 | ±50 | µV |
| Offset Voltage Drift | - | ±0.2 | ±0.5 | µV/°C |
| Input Bias Current | - | - | 5 | nA |
| Common-Mode Rejection Ratio (CMRR) | 110 | - | - | dB |
| Quiescent Current | - | - | 350 | µA |
| Operating Temperature Range | -40 | - | 85 | °C |
| Package Type | - | - | 8-Pin SOIC, 8-Pin PDIP | - |
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, minimum
- Inputs protected to ±40 V
- Wide supply range: ±2.25 to ±18 V
- Low quiescent current: 350 µA
- Packages: 8-Pin plastic DIP, SO-8
- Current-feedback input circuitry providing wide bandwidth even at high gain (70 kHz at G = 100)
- A single external resistor sets any gain from 1 to 10000
Applications
- Pressure transmitter
- Temperature transmitter
- Weigh scale
- Electrocardiogram (ECG)
- Analog input module
- Data acquisition (DAQ)
- Industrial process control systems
- Shop floor vibration sensing
Q & A
- What is the maximum offset voltage of the INA118UBG4?
The maximum offset voltage of the INA118UBG4 is 50 µV.
- What is the input bias current of the INA118UBG4?
The input bias current of the INA118UBG4 is 5 nA, maximum.
- What is the common-mode rejection ratio (CMRR) of the INA118UBG4?
The CMRR of the INA118UBG4 is 110 dB, minimum.
- What is the quiescent current of the INA118UBG4?
The quiescent current of the INA118UBG4 is 350 µA.
- What are the available packages for the INA118UBG4?
The INA118UBG4 is available in 8-Pin plastic DIP and SO-8 surface-mount packages.
- What is the operating temperature range of the INA118UBG4?
The operating temperature range of the INA118UBG4 is –40°C to +85°C.
- Can the INA118UBG4 be used in battery-operated systems?
Yes, the INA118UBG4 is suitable for battery-operated systems due to its low quiescent current and wide supply range.
- How is the gain set for the INA118UBG4?
The gain for the INA118UBG4 is set using a single external resistor, allowing gains from 1 to 10000.
- What are some typical applications of the INA118UBG4?
Typical applications include pressure transmitters, temperature transmitters, weigh scales, ECG, analog input modules, and data acquisition systems.
- Is there an upgraded version of the INA118UBG4 available?
Yes, an upgraded version known as the INA818 is available, offering lower input stage offset voltage, lower input bias current, and lower noise.
