ADA4350ARUZ-R7

Overview

The ADA4350ARUZ-R7 is a FET input analog front end with an integrated ADC driver, manufactured by Analog Devices Inc. It operates from a single +3.3 V supply or dual ±5 V supplies within a −40°C to +85°C temperature range. The device features a low noise amplifier with a gain bandwidth product of 175 MHz and an input bias current of ±0.25 pA typical at 25°C. It includes a switching network for up to six externally configurable feedback paths and an ADC driver capable of differential or single-ended modes. The component is housed in a 28-lead TSSOP package.

Feature Summary

• Integrates a low noise FET input amplifier with extremely low input bias current suitable for high impedance sensors.
• Includes an internal switching network allowing selection of up to six different external feedback networks.
• Features an integrated ADC driver supporting both differential and single-ended output configurations.

Applications

• Current to voltage (I to V) conversions
• Photodiode preamplifiers
• Chemical analyzers
• Mass spectrometry
• Data acquisition systems

Procurement Notes

Verify the specific ordering suffix R7 corresponds to tape and reel packaging when sourcing this component. Confirm that the digital supply voltage requirements align with your system's logic levels, as the device supports both 3.3 V and 5 V digital interfaces. Ensure proper handling procedures are followed due to the sensitivity of the FET input stage.

Selection Notes

Select this component for applications requiring precise gain selection to maximize dynamic range with photodetectors. Evaluate the trade-off between the low input bias current and the required feedback resistor values for your transimpedance design. Consider the power supply configuration, as quiescent current varies significantly between single-supply and dual-supply operation modes.

Part Context

This part belongs to the ADA4350 family of analog front ends designed for precision signal conditioning. It combines amplification, switching, and driving capabilities into a single monolithic IC. The ARUZ-R7 designation indicates the specific commercial temperature grade and surface-mount packaging variant offered by the manufacturer.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

FAQ

How is the gain switching controlled?

The gain switching network can be controlled via a serial peripheral interface (SPI) or parallel control logic.

What is the maximum operating supply voltage?

The analog supply operating range extends up to 12 V, while the digital supply range is limited to 5.5 V.

Can the ADC driver operate in single-ended mode?

Yes, the integrated ADC driver supports both differential mode and single-ended mode operations.