AD7741YR-REEL

Overview

The AD7741YR-REEL is a single-channel synchronous voltage-to-frequency converter from Analog Devices, housed in an 8-lead SOIC package. It operates on a single +5 V supply (4.75 V to 5.25 V) and features a buffered analog input with a range of 0 V to VREF. The device utilizes a charge-balance conversion technique and includes an internal +2.5 V bandgap reference. Key electrical specifications include an integral nonlinearity of ±0.012% at fCLKIN = 3 MHz, a maximum output frequency of 0.45 fCLKIN, and a typical normal mode current consumption of 6 mA.

Feature Summary

• Synchronous voltage-to-frequency conversion using a charge-balance modulator for high linearity
• Integrated +2.5 V bandgap reference with option for external overdrive
• Buffered analog input stage providing high impedance and minimal loading
• Power-down capability to reduce standby current consumption

Applications

• Low-cost analog-to-digital conversion systems
• Signal isolation applications using opto-couplers
• Industrial sensor interfacing requiring ratiometric measurement

Procurement Notes

Verify the specific Y suffix indicates the extended temperature range of -40°C to +105°C. Confirm the REEL packaging designation matches the required tape-and-reel quantity for production integration. Ensure the source documentation explicitly supports the ordering code before finalizing procurement decisions.

Selection Notes

Select this component when a single-ended input channel is sufficient for the application. The AD7741 differs from the AD7742 by lacking multiple differential inputs and programmable gain front-end options. It is suitable for designs prioritizing cost and simplicity over multi-channel capability.

Part Context

This part belongs to the AD7741/AD7742 family of synchronous VFCs. While the AD7742 offers multichannel configurations with selectable gains, the AD7741 provides a streamlined single-channel solution. Both share the same core modulation architecture and reference circuitry.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.