Overview
The INA126U is a precision instrumentation amplifier produced by Texas Instruments. It is part of the INAx126 family, designed for accurate, low-noise differential-signal acquisition. The amplifier features a two-op-amp design, which provides excellent performance with low quiescent current of 175 µA per channel. This makes it an ideal choice for portable instrumentation and data acquisition systems. The INA126U operates over a wide supply range of ±1.35 V to ±18 V and is available in an 8-pin SOIC (D) package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Quiescent Current | 175 | µA/channel |
| Supply Range | ±1.35 V to ±18 V | V |
| Offset Voltage | 250 | µV (maximum) |
| Offset Voltage Drift | 3 | µV/°C (maximum) |
| Noise | 35 | nV/√Hz |
| Input Bias Current | 25 | nA (maximum) |
| Temperature Range | –40°C to +85°C | °C |
| Gain Range | 5 to 10,000 | V/V |
| Package Type | 8-pin SOIC (D) | |
| Common-Mode Rejection Ratio (CMRR) | 83 to 94 dB | dB |
| Channel Separation (dual version) | 130 dB | dB |
Key Features
- Low quiescent current: 175 µA/channel
- Wide supply range: ±1.35 V to ±18 V
- Low offset voltage: 250 µV maximum
- Low offset voltage drift: 3 µV/°C maximum
- Low noise: 35 nV/√Hz
- Low input bias current: 25 nA maximum
- High temperature range: –40°C to +85°C
- Multiple package options: PDIP, SOIC, VSSOP
- Gain adjustable from 5 to 10,000 with a single external resistor
- Excellent common-mode rejection ratio (CMRR)
- High channel separation in dual versions
Applications
- Level transmitter
- Flow transmitter
- Multiparameter patient monitor
- Mixed module (AI, AO, DI, DO)
- AC charging (pile) station
- Infusion pump
- Electrocardiogram (ECG)
- Portable instrumentation and data acquisition systems
Q & A
- What is the quiescent current of the INA126U?
The quiescent current of the INA126U is 175 µA per channel.
- What is the operating supply range of the INA126U?
The INA126U operates over a supply range of ±1.35 V to ±18 V.
- What is the maximum offset voltage of the INA126U?
The maximum offset voltage of the INA126U is 250 µV.
- How is the gain of the INA126U adjusted?
The gain of the INA126U can be adjusted from 5 to 10,000 with a single external resistor.
- What is the temperature range of the INA126U?
The INA126U is specified for the –40°C to +85°C industrial temperature range.
- What are the package options for the INA126?
The INA126 is available in PDIP, SOIC, and VSSOP packages.
- What is the common-mode rejection ratio (CMRR) of the INA126U?
The CMRR of the INA126U is between 83 to 94 dB.
- Can the INA126U be used in single-supply configurations?
- What are some typical applications of the INA126U?
The INA126U is used in level transmitters, flow transmitters, multiparameter patient monitors, AC charging stations, infusion pumps, and electrocardiograms (ECG), among other applications.
- How does the INA126U handle high common-mode voltages?
The INA126U has high input impedance and can handle high common-mode voltages, making it suitable for applications where high common-mode voltages are present.
