Overview
The INA114AP is a precision instrumentation amplifier produced by Texas Instruments. It is a low-cost, general-purpose device that offers excellent accuracy and is designed for a wide range of applications. The amplifier features a versatile three-op-amp design and is available in small packages, making it suitable for various uses. The INA114AP operates with power supplies as low as ±2.25V, allowing it to be used in 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 precision in measurement and signal amplification.
Key Specifications
| Parameter | Value |
|---|---|
| Package | PDIP-8, SOIC-16 |
| Operating Temperature Range | −40°C to +85°C |
| 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 |
| Gain Range | 1 to 10,000 (set by external resistor) |
| 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 |
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
- Internal input protection withstands up to ±40V without damage
- Laser trimmed for high accuracy and stability
Applications
- Surgical equipment
- Actuators
- Multifunction relays
- Train control and management
- Trackside signaling and control
Q & A
- What is the INA114AP used for? The INA114AP is a precision instrumentation amplifier used for amplifying low-level signals in various applications, including surgical equipment, actuators, and train control systems.
- What are the key features of the INA114AP? Key features include low offset voltage, low drift, low input bias current, high common-mode rejection, and input over-voltage protection.
- What is the operating temperature range of the INA114AP? The operating temperature range is −40°C to +85°C.
- How is the gain of the INA114AP set? The gain is set by connecting a single external resistor.
- What are the available packages for the INA114AP? The device is available in 8-pin PDIP and 16-pin SOIC packages.
- What is the supply voltage range for the INA114AP? The supply voltage range is ±2.25V to ±18V.
- Does the INA114AP have input over-voltage protection? Yes, it has input over-voltage protection up to ±40V.
- What is the common-mode rejection ratio (CMRR) of the INA114AP? The CMRR is 115dB minimum at a gain of 1000.
- How does the INA114AP handle noise? The INA114AP provides very low noise, with approximately 0.4µVPP measured from 0.1Hz to 10Hz.
- Is the INA114AP suitable for battery-operated systems? Yes, it can operate with power supplies as low as ±2.25V, making it suitable for battery-operated systems.
