AD7741YR-REEL7

Overview

The AD7741YR-REEL7 is a single-channel synchronous voltage-to-frequency converter manufactured by Analog Devices Inc. It operates on a single +5 V supply with a voltage range of 4.75 V to 5.25 V and features an integral nonlinearity of 0.012%. The device utilizes a buffered analog input and includes an internal +2.5 V bandgap reference, supporting both unipolar and bipolar operation modes. Designed for the Y version temperature range of -40°C to +105°C, it employs a charge-balance conversion technique driven by an external master clock up to 6.144 MHz.

Feature Summary

• Synchronous voltage-to-frequency conversion using a charge-balance modulator
• Integrated programmable gain front-end with buffered analog inputs
• On-chip +2.5 V bandgap reference with external overdrive capability
• Configurable power-down mode for reduced current consumption

Applications

• Low-cost analog-to-digital conversion systems
• Signal isolation interfaces utilizing opto-couplers
• Industrial monitoring requiring high linearity

Procurement Notes

Verify the specific suffix 'YR' corresponds to the industrial temperature grade (-40°C to +105°C) and SOIC-8 package variant. Confirm that the REEL7 designation matches the required tape-and-reel packaging format for automated assembly processes. Ensure compatibility with the system's master clock frequency requirements before finalizing procurement.

Selection Notes

Select this component when a single-ended input channel is sufficient for the application design. Consider the AD7742 if multiple differential or pseudo-differential channels are required instead. Evaluate the need for the extended temperature range associated with the Y version versus the standard B version based on environmental operating conditions.

Part Context

This part belongs to the AD7741/AD7742 family of synchronous voltage-to-frequency converters. These devices utilize CMOS technology and offer high linearity without user trimming. The AD7741 specifically provides a single-channel solution in an 8-lead package, contrasting with the multichannel capabilities of the AD7742.

Replacement Considerations

The AD7741BR serves as a direct functional substitute within the same family but operates within the lower industrial temperature range of -40°C to +85°C.