Overview
The INA126E/250, 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 single-channel (INA126) and dual-channel (INA2126) versions. The INA126E/250 is particularly noted for its low power consumption, high accuracy, and versatility in various applications. It operates with a wide supply range from ±1.35 V to ±18 V and features a low quiescent current of 175 μA per channel, making it suitable for portable instrumentation and data acquisition systems.
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 Voltage | 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 |
| Common-Mode Rejection Ratio (CMRR) | 80 dB (typical) | dB |
| Bandwidth (–3 dB) | 200 kHz (G = 5) | kHz |
| Package Options | 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 configurations.
- Low offset voltage and drift: 250 μV maximum and 3 μV/°C maximum, respectively, ensuring high accuracy.
- Low noise: 35 nV/√Hz, which is crucial for precise signal acquisition.
- High input impedance: Approximately 10^9 Ω, which is beneficial for measuring signals from high-impedance sources.
- Adjustable gain: Gain can be set from 5 V/V to 10,000 V/V with a single external resistor.
- Multiple package options: Available in 8-pin VSSOP (DGK) for the INA126E/250.
Applications
- Level transmitter and flow transmitter systems.
- Multiparameter patient monitors and other medical devices.
- Mixed modules (AI, AO, DI, DO) in industrial automation.
- AC charging stations and infusion pumps.
- Electrocardiogram (ECG) and other biomedical instrumentation.
Q & A
- What is the quiescent current of the INA126E/250?
The quiescent current is 175 μA per channel.
- What is the supply voltage range for the INA126E/250?
The supply voltage range is ±1.35 V to ±18 V.
- What is the maximum offset voltage of the INA126E/250?
The maximum offset voltage is 250 μV.
- How can the gain of the INA126E/250 be adjusted?
The gain can be adjusted from 5 V/V to 10,000 V/V using a single external resistor.
- What is the common-mode rejection ratio (CMRR) of the INA126E/250?
The CMRR is typically 80 dB.
- What are the package options for the INA126E/250?
The INA126E/250 is available in an 8-pin VSSOP (DGK) package.
- What is the temperature range for the INA126E/250?
The temperature range is –40°C to +85°C.
- How does the INA126E/250 handle input bias current?
The device requires a path for the input bias current, which is typically –10 nA per input.
- Can the INA126E/250 be used in single-supply configurations?
- What are some common applications of the INA126E/250?
Common applications include level transmitters, flow transmitters, multiparameter patient monitors, and biomedical instrumentation like ECGs.
