INA350CDSIRUGR

Instrumentation, Op Amps, Buffer Amps Overview

The INA350CDSIRUGR is a selectable-gain instrumentation amplifier from Texas Instruments, housed in an X2QFN-10 package. It operates on a single supply voltage ranging from 1.8 V to 5.5 V or dual supplies of ±0.9 V to ±2.75 V. The device offers two gain options: G = 30 and G = 50, selected via the GS pin. Key electrical specifications include a typical quiescent current of 100 µA, a maximum input offset voltage of 1.2 mV, and a minimum common-mode rejection ratio (CMRR) of 85 dB. The bandwidth varies with gain, reaching 40 kHz at G = 30 and 25 kHz at G = 50. It features an integrated shutdown function for power savings and is specified for operation across a temperature range of –40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Selectable gain architecture allows switching between G = 30 and G = 50 using the Gain Select (GS) pin without external resistors.
• Integrated shutdown capability reduces quiescent current significantly when the device is disabled, supporting battery-powered applications.
• Ultra-small X2QFN package minimizes board space requirements while maintaining precision performance metrics.
• Optimized for low-power designs with typical quiescent current of 100 µA and rail-to-rail output drive capabilities.

Instrumentation, Op Amps, Buffer Amps Applications

• Bridge network sensing
• Weigh scale systems
• Wearable fitness and activity monitors
• Blood glucose monitors
• Pressure and temperature sensing

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'RUG' corresponds to the X2QFN-10 package configuration required for your layout. Confirm that the 'CDS' variant matches the desired gain settings of 30 or 50. Ensure compatibility with your system's supply voltage range of 1.8 V to 5.5 V. Check for RoHS compliance status if required by your manufacturing standards. Validate thermal management needs given the small package size and junction-to-ambient resistance values.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Choose this component when space-constrained designs require high precision without external resistor networks. The selectable gain feature simplifies design flexibility compared to fixed-gain amplifiers. Consider the 100 µA quiescent current for battery life calculations. The integrated shutdown pin provides additional power control not available in standard instrumentation amplifiers. Ensure the 40 kHz bandwidth at G=30 meets your signal frequency requirements.

Instrumentation, Op Amps, Buffer Amps Part Context

The INA350 series includes variants like INA350ABS (G=10/20) and INA350CDS (G=30/50). The CDS variant specifically targets higher gain applications. Available packages include WSON-8, SOT-23-THN-8, and X2QFN-10. This family replaces discrete solutions, reducing BOM costs and improving accuracy through matched internal resistors. It competes in the low-power, cost-optimized instrumentation amplifier market segment.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

INA350ABSIRUGR offers different gain options (10 or 20) instead of 30 or 50. Verify gain requirements before substitution. Other packages like DSG or DDF are available but have different footprints. No direct functional equivalents with identical gain options and package are listed in official documentation.