Precision INSTRUMENTATION AMPLIFIER The INA115AU is a precision instrumentation amplifier manufactured by Texas Instruments (TI) and Burr-Brown (BB). Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Supply Voltage Range:** ±2.25V to ±18V
- **Input Voltage Range:** ±10V (with ±15V supply)
- **Common-Mode Voltage Range:** ±11.5V (with ±15V supply)
- **Gain Range:** 1 to 10,000 (set via external resistor)
- **Gain Accuracy:** 0.5% max (G = 1)
- **Input Offset Voltage:** 50µV max
- **Input Bias Current:** 2nA max
- **CMRR (Common-Mode Rejection Ratio):** 115dB min (G = 1000)
- **Bandwidth:** 200kHz (G = 1)
- **Slew Rate:** 1.2V/µs
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** 16-pin SOIC
### **Descriptions:**
The INA115AU is a high-precision, low-noise instrumentation amplifier designed for applications requiring accurate signal amplification in the presence of common-mode noise. It features laser-trimmed resistors for high gain accuracy and low offset voltage.
### **Features:**
- **Low Offset Voltage:** 50µV max
- **Low Noise:** 10nV/√Hz at 1kHz
- **High CMRR:** 115dB min (G = 1000)
- **Wide Supply Range:** ±2.25V to ±18V
- **Low Input Bias Current:** 2nA max
- **External Gain Setting:** Adjustable from 1 to 10,000
- **Laser-Trimmed Resistors:** Ensures high precision
- **Stable with Capacitive Loads:** No external compensation needed
The INA115AU is commonly used in medical instrumentation, industrial sensors, and data acquisition systems where high accuracy and noise rejection are critical.
