AD7741BR-REEL7

Overview

The AD7741BR-REEL7 is a single-channel synchronous voltage-to-frequency converter from Analog Devices. It operates on a single +5 V supply (4.75 V to 5.25 V) and features an integral nonlinearity of 0.012% at maximum output frequencies up to 1.35 MHz. The device includes a buffered analog input, programmable gain front-end, and an internal +2.5 V reference. It supports external clock inputs up to 6.144 MHz for stable conversion timing.

Feature Summary

• Synchronous voltage-to-frequency conversion using charge-balance technique
• Integrated +2.5 V bandgap reference with external overdrive option
• Buffered analog input stage with high impedance characteristics
• Low power standby mode via active low control pin

Applications

• Low cost analog-to-digital conversion systems
• Signal isolation applications using opto-couplers
• Industrial sensor signal conditioning

Procurement Notes

Verify the B version temperature range (-40°C to +85°C) against application requirements. Confirm the REEL7 packaging suffix matches automated assembly needs. Ensure the master clock source meets the specified frequency limits for optimal linearity performance.

Selection Notes

Select this component for single-ended input applications requiring high linearity without user trimming. Compare with the AD7742 if multiple differential channels are needed. Consider the internal reference stability or plan for an external precision reference if higher accuracy is required.

Part Context

This part belongs to the AD7741/AD7742 family of synchronous VFCs. The AD7741 variant provides a single channel in an 8-lead package, while the AD7742 offers multi-channel capabilities. Both utilize CMOS technology for low power consumption and high integration.

Replacement Considerations

The AD7741YR serves as the industrial temperature grade alternative within the same package type.