Overview
The INA118P from Texas Instruments is a precision, low-power instrumentation amplifier designed for a wide range of applications requiring high accuracy and low power consumption. This device features a versatile, three op-amp design and current-feedback input circuitry, providing wide bandwidth even at high gain settings. The INA118P is laser-trimmed for low offset voltage, drift, and high common-mode rejection, making it an excellent choice for battery-operated systems and other applications where precision and low power are critical.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 8-Pin PDIP, SO-8 |
| Mounting Type | Through Hole, Surface Mount |
| Power Supply Type | Dual |
| Power Supply Range | ±2.25 V to ±18 V |
| Quiescent Current | 350 µA |
| Maximum Input Offset Voltage | ±50 µV |
| Input Bias Current | 5 nA, maximum |
| Common-Mode Rejection Ratio (CMRR) | 110 dB, minimum |
| Input Protection | Up to ±40 V |
| Operating Temperature Range | –40°C to +85°C |
| Bandwidth | 70 kHz at G = 100 |
Key Features
- Low offset voltage: 50 µV, maximum
- Low drift: 0.5 µV/°C, maximum
- Low input bias current: 5 nA, maximum
- High CMR: 110 dB, minimum
- 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 10000
- Current-feedback input circuitry for wide bandwidth
Applications
- Pressure transmitter
- Temperature transmitter
- Weigh scale
- Electrocardiogram (ECG)
- Analog input module
- Data acquisition (DAQ)
Q & A
- What is the INA118P used for? The INA118P is a precision, low-power instrumentation amplifier used in various applications requiring high accuracy and low power consumption.
- What are the package options for the INA118P? The INA118P is available in 8-pin plastic DIP and SO-8 surface-mount packages.
- What is the operating temperature range of the INA118P? The INA118P operates within a temperature range of –40°C to +85°C.
- How is the gain set for the INA118P? The gain of the INA118P can be set using a single external resistor, allowing gains from 1 to 10000.
- What is the maximum input offset voltage of the INA118P? The maximum input offset voltage of the INA118P is ±50 µV.
- What is the quiescent current of the INA118P? The quiescent current of the INA118P is 350 µA.
- What is the common-mode rejection ratio (CMRR) of the INA118P? The CMRR of the INA118P is 110 dB, minimum.
- How are the inputs of the INA118P protected? The inputs of the INA118P are protected up to ±40 V.
- What are some typical applications of the INA118P? Typical applications include pressure transmitters, temperature transmitters, weigh scales, electrocardiograms (ECG), analog input modules, and data acquisition (DAQ) systems.
- Is there an upgraded version of the INA118P available? Yes, an upgraded version called the INA818 is available, offering lower input stage offset voltage, lower input bias current, and lower noise.
