Overview
The INA337AIDGKR, produced by Texas Instruments, is a high-temperature, high-performance, low-cost precision instrumentation amplifier. It is designed for single-supply operation and features very-low DC errors and an input common-mode range that extends beyond the positive and approaches the negative rail. This makes it suitable for a wide range of applications from general-purpose to high-accuracy.
The INA337AIDGKR is known for its excellent long-term stability and very-low 1/f noise, ensuring low offset voltage and drift throughout the product's life. It is available in an MSOP-8 package and is specified over a temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Condition | Min | Max | Units | |
|---|---|---|---|---|---|
| Input Offset Voltage, RTI (VOS) | VS = +5V, VCM = VS/2 | ±20 | ±100 | µV | |
| Offset Voltage Drift (dVOS/dT) | vs Temperature | ±0.1 | ±0.4 | µV/°C | |
| Power Supply Rejection Ratio (PSR) | VS = +2.7V to +5.5V, VCM = VS/2 | ±20 | ±3 | µV/V | |
| Input Impedance, Differential | 1010 || 2 | Ω || pF | |||
| Common-Mode Rejection Ratio (CMR) | VS = +5V, VCM = (V–) + 0.25V to (V+) + 0.1V | 106 | 120 | dB | |
| Input Bias Current (IB) | VCM = VS/2 | ±0.2 | ±2 | nA | |
| Quiescent Current (IQ) | IO = 0, Diff VIN = 0V, VS = +5V | 2.4 | 3.4 | mA | |
| Specified Voltage Range | +2.7 | +5.5 | V | ||
| Operating Temperature Range | –40 | +125 | °C |
Key Features
- Precision: Low offset voltage of ±100µV (max) and low offset drift of ±0.4µV/°C (max).
- Long-Term Stability: Excellent stability with very-low 1/f noise.
- Small Size: Available in MSOP-8 package.
- Low Cost: Cost-effective solution for precision instrumentation applications.
- Wide Input Range: Input voltage range extends from 0.25V above the negative rail to 0.1V above the positive rail.
- High Common-Mode Rejection Ratio (CMR): CMR of 106 dB (min) and 120 dB (typ) at VS = +5V.
- Internal Input Protection: Inputs protected with internal diodes connected to the power-supply rails.
Applications
- Low-Level Transducer Amplifier: Suitable for bridges, load cells, thermocouples.
- Wide Dynamic Range Sensor Measurements: Ideal for high-resolution sensor measurements.
- High-Resolution Test Systems: Used in test systems requiring high accuracy.
- Weigh Scales: Applied in precision weighing applications.
- Multi-Channel Data Acquisition Systems: Used in data acquisition systems requiring multiple channels.
- Medical Instrumentation: Suitable for medical devices requiring high precision.
- Automotive Applications: Used in various automotive sensing and measurement applications.
- General-Purpose: Can be used in a variety of general-purpose instrumentation applications.
Q & A
- What is the maximum input offset voltage of the INA337AIDGKR?
The maximum input offset voltage is ±100µV at VS = +5V and VCM = VS/2.
- What is the typical quiescent current of the INA337AIDGKR?
The typical quiescent current is 3.4 mA at VS = +5V.
- What is the operating temperature range of the INA337AIDGKR?
The specified operating temperature range is –40°C to +125°C.
- What is the common-mode rejection ratio (CMR) of the INA337AIDGKR?
The CMR is 106 dB (min) and 120 dB (typ) at VS = +5V.
- Does the INA337AIDGKR have internal input protection?
Yes, the inputs are protected with internal diodes connected to the power-supply rails.
- What is the typical input bias current of the INA337AIDGKR?
The typical input bias current is ±2 nA at VS = +5V and VCM = VS/2.
- What is the specified voltage range for the INA337AIDGKR?
The specified voltage range is +2.7V to +5.5V.
- How does the INA337AIDGKR achieve high common-mode rejection?
The INA337AIDGKR uses a unique internal topology that converts the input voltage to a current, providing rejection of common-mode input voltage and power-supply variation without the need for accurately matched resistors.
- What are some typical applications of the INA337AIDGKR?
Typical applications include low-level transducer amplifiers, wide dynamic range sensor measurements, high-resolution test systems, weigh scales, multi-channel data acquisition systems, medical instrumentation, and automotive applications.
- What package type is the INA337AIDGKR available in?
The INA337AIDGKR is available in an MSOP-8 package.
