Overview
The INA126UAG4, 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 INA126UAG4 is specifically packaged in an 8-pin SOIC (D) package. It features a two-op-amp design that provides excellent performance with low quiescent current, making it ideal for portable instrumentation and data acquisition systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Quiescent Current (per channel) | - | 175 | 200 | μA |
| Supply Voltage Range | ±1.35 | - | ±18 | V |
| Offset Voltage | - | - | 250 | μV |
| Offset Voltage Drift | - | - | 3 | μV/°C |
| Voltage Noise | - | - | 35 | nV/√Hz |
| Input Bias Current | - | - | 25 | nA |
| Temperature Range | -40 | - | 85 | °C |
| Gain Range | 5 | - | 10000 | V/V |
| Common-Mode Rejection Ratio (CMRR) | 80 | - | 94 | dB |
| Bandwidth (–3 dB) | - | - | 200 kHz (G = 5) | - |
Key Features
- Low Quiescent Current: 175 μA per channel, making it suitable for battery-powered and portable applications.
- Wide Supply Range: Operates from ±1.35 V to ±18 V, allowing for flexibility in power supply configurations.
- Low Offset Voltage and Drift: Maximum offset voltage of 250 μV and drift of 3 μV/°C, ensuring high accuracy over temperature changes.
- Low Noise: Voltage noise of 35 nV/√Hz, which is crucial for precise signal acquisition.
- Low Input Bias Current: Maximum input bias current of 25 nA, reducing the impact on the signal source.
- High Common-Mode Rejection Ratio (CMRR): Up to 94 dB, providing excellent rejection of common-mode signals.
- Adjustable Gain: Gain can be set from 5 V/V to 10000 V/V using a single external resistor.
- Multiple Package Options: Available in 8-pin PDIP, SOIC, and VSSOP packages for different application needs.
Applications
- Level Transmitter: Used in industrial measurement systems to convert physical parameters into electrical signals.
- Flow Transmitter: Employed in fluid measurement systems to monitor and control flow rates.
- Multiparameter Patient Monitor: Utilized in medical devices to monitor various patient parameters such as ECG, blood pressure, etc.
- Mixed Module (AI, AO, DI, DO): Integrated into mixed-signal modules that combine analog and digital inputs and outputs.
- AC Charging (Pile) Station: Used in charging stations for electric vehicles to monitor and control charging parameters.
- Infusion Pump: Employed in medical devices to precisely control the flow of fluids.
- Electrocardiogram (ECG): Used in medical diagnostic equipment to measure heart activity.
Q & A
- What is the quiescent current of the INA126UAG4?
The quiescent current of the INA126UAG4 is typically 175 μA per channel, with a maximum of 200 μA.
- What is the supply voltage range for the INA126UAG4?
The INA126UAG4 operates from a supply voltage range of ±1.35 V to ±18 V.
- What is the maximum offset voltage of the INA126UAG4?
The maximum offset voltage of the INA126UAG4 is 250 μV.
- How is the gain of the INA126UAG4 adjusted?
The gain of the INA126UAG4 can be adjusted from 5 V/V to 10000 V/V using a single external resistor.
- What is the common-mode rejection ratio (CMRR) of the INA126UAG4?
The CMRR of the INA126UAG4 is up to 94 dB.
- What are the package options for the INA126UAG4?
The INA126UAG4 is available in an 8-pin SOIC (D) package, but the INA126 family also includes PDIP and VSSOP options.
- What is the temperature range for the INA126UAG4?
The INA126UAG4 is specified for an industrial temperature range of –40°C to +85°C.
- What is the input bias current of the INA126UAG4?
The maximum input bias current of the INA126UAG4 is 25 nA.
- What are some typical applications of the INA126UAG4?
The INA126UAG4 is used in various applications including level transmitters, flow transmitters, multiparameter patient monitors, and more.
- How does the INA126UAG4 handle common-mode signals?
The INA126UAG4 provides excellent rejection of common-mode signals with a CMRR of up to 94 dB.
