INA116PAG4

Overview

The INA116PAG4 is a monolithic FET-input instrumentation amplifier from Texas Instruments, part of the Difet series. It features an ultra-low input bias current and a complete three-op amp topology that allows gain setting via a single external resistor. The device offers a bandwidth of 800kHz and a slew rate of 0.08V/µs. It operates within a supply voltage range of 4.5V to 18V. The component is housed in a 16-pin PDIP package.

Feature Summary

• Ultra-low input bias current characteristic suitable for high-impedance signal sources
• Three-op amp topology enables precise gain adjustment using only one external resistor
• Monolithic FET-input design ensures high input impedance and stability

Applications

• High-impedance sensor interfaces
• Photodiode amplification circuits
• Precision data acquisition systems

Procurement Notes

Verify the specific suffix G4 indicates lead-free compliance and RoHS adherence when sourcing. Confirm the 16-pin PDIP package type matches your PCB footprint requirements. Ensure the operating supply voltage remains within the specified 4.5V to 18V range for proper functionality. Cross-reference the manufacturer date code if long-term storage or specific batch consistency is required for your production line.

Selection Notes

Select this component when extremely low input bias current is critical for maintaining accuracy with high-source-impedance signals. The single-resistor gain setting simplifies circuit design compared to discrete solutions. Consider the 800kHz bandwidth limit for high-speed applications. The FET input stage makes it distinct from bipolar input amplifiers where offset voltage might be lower but bias current higher.

Part Context

The INA116 belongs to Texas Instruments' Difet family of instrumentation amplifiers. This series is engineered for applications requiring minimal input current loading. The PAG4 variant specifically denotes the plastic DIP packaging with green mold compound and lead-free termination finish, aligning with environmental standards while maintaining the core electrical performance of the standard INA116.

Replacement Considerations

Direct pin-compatible replacements may include other Difet series amplifiers from Texas Instruments. Verify that any substitute maintains the ultra-low bias current specification and compatible supply voltage range. Check if the alternative offers similar bandwidth and gain-setting flexibility through a single resistor.