INA823DGKR

Instrumentation, Op Amps, Buffer Amps Overview

The INA823DGKR is a precision, low-power instrumentation amplifier from Texas Instruments. It operates on a wide supply range of 2.7 V to 36 V (single) or ±1.35 V to ±18 V (dual). The device features a typical quiescent current of 180 µA and sets gain from 1 to 10,000 via a single external resistor using the equation G = 1 + (100 kΩ / RG). Key electrical characteristics include a maximum input offset voltage of 100 µV, maximum input bias current of 8 nA, and an input overvoltage protection rating of ±60 V. It provides high common-mode rejection ratios ranging from 84 dB at G=1 to 120 dB at gains greater than or equal to 100.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Offers integrated input overvoltage protection capable of withstanding voltages up to ±60 V.
• Enables flexible gain configuration from unity to 10,000 through a single external resistor connection.
• Supports operation across a broad single-supply or dual-supply voltage spectrum for versatile system integration.

Instrumentation, Op Amps, Buffer Amps Applications

• Flow transmitters
• Wearable fitness and activity monitors
• Infusion pumps
• Blood glucose monitors
• Electrocardiogram (ECG) systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific package variant against project requirements, as the DGKR suffix denotes the VSSOP-8 package. Confirm that the operating temperature range aligns with the specified -40°C to +125°C limits. Ensure the external gain-setting resistor tolerance meets the required accuracy standards, as gain error specifications exclude resistor effects. Validate power supply decoupling strategies to maintain the specified power supply rejection ratio performance under varying load conditions.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when low power consumption is critical alongside high precision in a compact form factor. The wide supply range accommodates both battery-operated handheld devices and higher voltage industrial systems. Consider the capacitive load stability if driving long cables or filtering networks directly. Evaluate the input bias current specifications against source impedance requirements to minimize offset errors in high-impedance sensor interfaces.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the INA823 family of instrumentation amplifiers designed for cost-effective, high-performance signal conditioning. It shares architectural similarities with other TI precision amplifiers but distinguishes itself through its specific combination of ultra-low power draw and robust overvoltage protection capabilities within a small surface-mount footprint.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Review the INA821, INA819, and INA826 datasheets for potential alternatives. Verify pin compatibility and gain equations, as these devices may utilize different internal resistor values for gain setting. Assess whether the alternative parts meet the specific bandwidth and noise density requirements of the application.