ADA4505-4ARUZ

Overview

The ADA4505-4ARUZ is a quad micropower operational amplifier featuring rail-to-rail input and output swings. It operates from a single 1.8 V to 5 V supply or dual ±0.9 V to ±2.5 V supplies. Key electrical parameters include a maximum offset voltage of 3 mV, typical input bias current of 0.5 pA, and supply current of 7 µA per amplifier. The device offers a gain-bandwidth product of 50 kHz, slew rate of 6 mV/µs, and PSRR of 100 dB minimum. It is housed in a 14-lead TSSOP package.

Feature Summary

• Zero input crossover distortion achieved via an on-chip charge pump for the input differential pair
• Rail-to-rail input and output capability maintaining high CMRR across the full common-mode range
• Micropower consumption with very low input bias current suitable for battery-powered applications

Applications

• Pulse oximeter red and infrared current sources
• Pressure and position sensors
• Remote security systems
• Medical monitors
• Battery-powered consumer equipment

Procurement Notes

Verify the specific ordering suffix ARUZ corresponds to the 14-lead TSSOP package variant. Confirm that the component meets the required industrial temperature specifications. Ensure compatibility with the intended PCB footprint and soldering profile for surface-mount assembly. Cross-reference the datasheet revision to validate all electrical characteristics against the design requirements.

Selection Notes

Select this component when designing low-voltage, battery-operated circuits requiring precision amplification without crossover distortion. The quad configuration allows multiple signal paths within a single package. Consider the 14-lead TSSOP package for board space constraints. Verify that the 50 kHz bandwidth and 6 mV/µs slew rate meet the dynamic performance needs of the application.

Part Context

This part belongs to the ADA4505-x family of zero-drift amplifiers designed for low-power applications. The quad version provides four independent amplifiers in one package. It shares core technology with the single (ADA4505-1) and dual (ADA4505-2) variants. The family utilizes CMOS technology optimized for minimal power consumption while maintaining high precision.

Replacement Considerations

Check for availability of other packaging options within the same family, such as WLCSP variants. Verify if alternative quad amplifiers from Analog Devices offer similar power and precision specs.