Overview
The INA126E/2K5 is a precision instrumentation amplifier produced by Texas Instruments. It is part of the INA126 series, known for its low power consumption and high accuracy in differential signal acquisition. This amplifier is designed for applications requiring low noise, low offset voltage, and a wide operating voltage range. The INA126E/2K5 is particularly suited for portable instrumentation and data acquisition systems due to its microPower consumption and robust performance characteristics.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Quiescent Current (per channel) | 175 | μA |
| Supply Voltage Range | ±1.35 V to ±18 V | V |
| Offset Voltage (maximum) | 250 | μV |
| Offset Voltage Drift (maximum) | 3 | μV/°C |
| Noise (input-referred) | 35 | nV/√Hz |
| Input Bias Current (maximum) | 25 | nA |
| Temperature Range | –40°C to +85°C | °C |
| Bandwidth (–3dB) at G = 5 | 200 | kHz |
| Slew Rate at G = 5 | 0.4 | V/μs |
| Settling Time (0.01%) at G = 5 | 30 | μs |
| Package Type | 8-pin VSSOP (DGK) |
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 design.
- Low offset voltage: 250 μV maximum, ensuring high accuracy in signal acquisition.
- Low offset drift: 3 μV/°C maximum, providing stable performance over a wide temperature range.
- Low noise: 35 nV/√Hz, ideal for applications requiring high signal-to-noise ratio.
- Low input bias current: 25 nA maximum, minimizing the impact on the input signal.
- Multiple package options: Available in PDIP, SOIC, and VSSOP packages to suit different design needs.
- Gain adjustable: Gain can be set from 5 V/V to 10000 V/V with a single external resistor.
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 electric vehicle charging systems.
- Infusion pumps and other precision medical equipment.
- Electrocardiogram (ECG) and other biomedical signal acquisition systems.
Q & A
- What is the quiescent current of the INA126E/2K5?
The quiescent current of the INA126E/2K5 is 175 μA per channel.
- What is the supply voltage range of the INA126E/2K5?
The supply voltage range is ±1.35 V to ±18 V.
- What is the maximum offset voltage of the INA126E/2K5?
The maximum offset voltage is 250 μV.
- What is the temperature range of the INA126E/2K5?
The operating temperature range is –40°C to +85°C.
- What are the package options available for the INA126 series?
The INA126 series is available in PDIP, SOIC, and VSSOP packages.
- How can the gain of the INA126E/2K5 be adjusted?
The gain can be set from 5 V/V to 10000 V/V with a single external resistor.
- What is the common-mode rejection ratio (CMRR) of the INA126E/2K5?
The CMRR is up to 94 dB, depending on the gain and package type.
- What are some typical applications of the INA126E/2K5?
Typical applications include level transmitters, flow transmitters, multiparameter patient monitors, and infusion pumps.
- What is the slew rate of the INA126E/2K5 at a gain of 5?
The slew rate at a gain of 5 is 0.4 V/μs.
- What is the settling time of the INA126E/2K5 for a 10V step at a gain of 5?
The settling time for a 10V step at a gain of 5 is 30 μs.
