Overview
The INA126U/2K5G4, produced by Texas Instruments, is a precision instrumentation amplifier designed for accurate, low-noise differential signal acquisition. This device is part of the INAx126 family, which includes both single-channel (INA126) and dual-channel (INA2126) versions. The two-op-amp design of the INA126U/2K5G4 provides excellent performance with very low quiescent current, making it ideal for portable instrumentation and data acquisition systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Quiescent Current (per channel) | 175 | μA |
| Supply Voltage Range | ±1.35 V to ±18 V | V |
| Offset Voltage | 250 | μV (maximum) |
| Offset Voltage Drift | 3 | μV/°C (maximum) |
| Voltage 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) |
Key Features
- Low quiescent current: 175 μA/channel, making it suitable for battery-powered devices.
- Wide supply range: ±1.35 V to ±18 V, allowing for flexibility in power supply configurations.
- Low offset voltage: 250 μV maximum, and low offset voltage drift: 3 μV/°C maximum, ensuring high accuracy.
- Low noise: 35 nV/√Hz, which is crucial for precise signal acquisition.
- Low input bias current: 25 nA maximum, reducing the impact on the signal source.
- High common-mode rejection ratio (CMRR): Up to 94 dB, depending on the gain and package type.
- Gain can be set from 5 V/V to 10,000 V/V with a single external resistor.
- Multiple package options: 8-pin PDIP, SOIC, and VSSOP for single-channel versions.
Applications
- Level transmitter and flow transmitter systems.
- Multiparameter patient monitors and medical devices.
- Mixed modules (AI, AO, DI, DO) in industrial automation.
- AC charging stations and infusion pumps.
- Electrocardiogram (ECG) and other biomedical equipment.
- Industrial sensor amplifiers for bridges, RTDs, and thermocouples.
Q & A
- What is the quiescent current of the INA126U/2K5G4?
The quiescent current is 175 μA per channel.
- What is the supply voltage range for the INA126U/2K5G4?
The supply voltage range is ±1.35 V to ±18 V.
- What is the maximum offset voltage of the INA126U/2K5G4?
The maximum offset voltage is 250 μV.
- How can the gain be set for the INA126U/2K5G4?
The gain can be set from 5 V/V to 10,000 V/V with a single external resistor.
- What are the package options for the INA126U/2K5G4?
The package options include 8-pin PDIP, SOIC, and VSSOP.
- What is the temperature range for the INA126U/2K5G4?
The temperature range is –40°C to +85°C.
- What is the common-mode rejection ratio (CMRR) of the INA126U/2K5G4?
The CMRR can be up to 94 dB, depending on the gain and package type.
- Can the INA126U/2K5G4 be used in single-supply configurations?
- What are some typical applications of the INA126U/2K5G4?
Typical applications include level transmitters, flow transmitters, multiparameter patient monitors, and industrial sensor amplifiers.
- What is the input bias current of the INA126U/2K5G4?
The input bias current is 25 nA maximum.
