Overview
The INA114AU/1KG4 is a precision instrumentation amplifier produced by Texas Instruments. It is a low-cost, general-purpose device designed for high accuracy and versatility. The INA114 features a three-op-amp design, which provides excellent performance in various applications. It is laser trimmed for very low offset voltage, low drift, and high common-mode rejection, making it an excellent choice for a wide range of uses.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Offset Voltage | - | - | 50 µV | - |
| Offset Voltage Drift | - | - | 0.3 µV/°C | - |
| Input Bias Current | - | - | 2 nA | - |
| Common-Mode Rejection Ratio (CMRR) | 115 dB | - | - | - |
| Input Over-Voltage Protection | - | - | ±40 V | - |
| Supply Range | ±2.25 V | - | ±18 V | - |
| Gain Range | 1 | - | 10,000 | - |
| Bandwidth (–3 dB) | - | - | 1 MHz (G = 1) | - |
| Slew Rate | 0.3 V/µs | 0.6 V/µs | - | - |
| Noise Voltage | - | - | 15 nV/√Hz (f = 10 Hz) | - |
Key Features
- Low offset voltage: 50 µV maximum for high gains.
- Low drift: 0.3 µV/°C maximum for high gains.
- Low input bias current: 2 nA maximum.
- High common-mode rejection: 115 dB minimum at G = 1000.
- Input over-voltage protection: ±40 V.
- Wide supply range: ±2.25 V to ±18 V.
- Single external resistor sets any gain from 1 to 10,000.
- Available in PDIP-8 and SOIC-16 packages.
Applications
- Surgical equipment.
- Actuators.
- Multifunction relays.
- Train control and management systems.
- Trackside signaling and control systems.
Q & A
- What is the maximum offset voltage of the INA114AU/1KG4?
The maximum offset voltage is 50 µV for high gains.
- How is the gain of the INA114AU/1KG4 set?
The gain is set by connecting a single external resistor, RG, using the equation G = 1 + 50 kΩ / RG.
- What is the common-mode rejection ratio (CMRR) of the INA114AU/1KG4?
The CMRR is 115 dB minimum at G = 1000.
- What is the input over-voltage protection of the INA114AU/1KG4?
The input over-voltage protection is ±40 V.
- What are the available packages for the INA114AU/1KG4?
The device is available in PDIP-8 and SOIC-16 packages.
- What is the bandwidth of the INA114AU/1KG4 at a gain of 1?
The bandwidth is 1 MHz at a gain of 1.
- What is the slew rate of the INA114AU/1KG4?
The slew rate is 0.3 V/µs to 0.6 V/µs.
- What is the noise voltage of the INA114AU/1KG4 at 10 Hz?
The noise voltage is approximately 15 nV/√Hz at 10 Hz.
- What are some typical applications of the INA114AU/1KG4?
Typical applications include surgical equipment, actuators, multifunction relays, train control and management systems, and trackside signaling and control systems.
- What is the supply range of the INA114AU/1KG4?
The supply range is ±2.25 V to ±18 V.
