AD7741BRZ-REEL

Overview

The AD7741BRZ-REEL 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. The device features an integral nonlinearity of 0.012% at maximum output frequencies up to 1.35 MHz. It includes an internal +2.5 V bandgap reference and a programmable gain analog front-end. The component utilizes a charge-balance conversion technique and accepts a master clock input frequency of 6.144 MHz for specified performance.

Feature Summary

• Synchronous voltage-to-frequency conversion using a charge-balance modulator
• Integrated +2.5 V bandgap reference with external overdrive capability
• Buffered analog input stage providing high impedance
• Pin-programmable power-down mode for reduced current consumption

Applications

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

Procurement Notes

Verify the specific suffix 'BRZ' corresponds to the industrial temperature range (-40°C to +85°C) and SOIC-8 package configuration. Confirm that the REEL designation matches the required tape-and-reel packaging format for automated assembly processes. Ensure compatibility with the system's clock source requirements before finalizing procurement.

Selection Notes

Select this component when a single-ended, buffered voltage input is required with high linearity. The AD7741 differs from the AD7742 by offering only one input channel rather than multiple differential or pseudo-differential channels. Consider the internal reference stability versus external precision references based on application noise requirements.

Part Context

This part belongs to the AD7741/AD7742 family of synchronous voltage-to-frequency converters. The AD7741 variant specifically provides a single-channel solution in an 8-lead package, whereas the AD7742 offers multichannel capabilities in a 16-lead package. Both share the same core modulation architecture and reference specifications.

Replacement Considerations

The AD7741YR serves as a higher temperature grade replacement within the same package type. Verify pinout compatibility if substituting with other voltage-to-frequency converters, as interface logic levels and clock requirements may differ significantly across manufacturers.