Overview
The INA114AU, produced by Texas Instruments, is a low-cost, general-purpose instrumentation amplifier known for its excellent accuracy and versatility. This device features a three-op-amp design and is available in small packages, making it an excellent choice for a wide range of applications. The INA114AU can operate with power supplies as low as ±2.25V, making it suitable for battery-operated and single 5V supply systems. It is laser trimmed for very low offset voltage, low drift, and high common-mode rejection, ensuring high performance in various environments.
Key Specifications
| Parameter | Value |
|---|---|
| Offset Voltage | 50µV maximum for high gains |
| Drift | 0.3µV/°C maximum for high gains |
| Input Bias Current | 2nA maximum |
| Common-Mode Rejection Ratio (CMRR) | 115dB minimum at G = 1000 |
| Input Over-Voltage Protection | ±40V |
| Supply Range | ±2.25V to ±18V |
| Bandwidth | 1 MHz at G = 1, 100 kHz at G = 10, 10 kHz at G = 100, 1 kHz at G = 1000 |
| Slew Rate | 0.3 to 0.6 V/µs at G = 10 |
| Settling Time | 18 µs at G = 1, 20 µs at G = 10, 120 µs at G = 100, 1100 µs at G = 1000 |
| Operating Temperature Range | -40°C to +85°C |
| Packages | PDIP-8 and SOIC-16 |
Key Features
- Low offset voltage: 50µV maximum for high gains
- Low drift: 0.3µV/°C maximum for high gains
- Low input bias current: 2nA maximum
- High common-mode rejection: 115dB minimum
- Input over-voltage protection: ±40V
- Wide supply range: ±2.25V to ±18V
- Single external resistor sets any gain from 1 to 10,000
- Available in 8-pin PDIP and 16-pin SOIC packages
Applications
- Surgical equipment
- Actuators
- Multifunction relays
- Train control and management
- Trackside signaling and control
Q & A
- What is the maximum offset voltage of the INA114AU? The maximum offset voltage is 50µV for high gains.
- What is the drift specification of the INA114AU? The drift is 0.3µV/°C maximum for high gains.
- What is the input bias current of the INA114AU? The input bias current is 2nA maximum.
- What is the common-mode rejection ratio (CMRR) of the INA114AU? The CMRR is 115dB minimum at G = 1000.
- What is the input over-voltage protection of the INA114AU? The input over-voltage protection is ±40V.
- What is the supply range of the INA114AU? The supply range is ±2.25V to ±18V.
- How is the gain set for the INA114AU? The gain is set by connecting a single external resistor, RG, according to the equation G = 1 + 50 kΩ / RG.
- What are the available packages for the INA114AU? The INA114AU is available in 8-pin PDIP and 16-pin SOIC packages.
- What is the operating temperature range of the INA114AU? The operating temperature range is -40°C to +85°C.
- What are some typical applications of the INA114AU? Typical applications include surgical equipment, actuators, multifunction relays, train control and management, and trackside signaling and control.
