AD7741BR

Overview

The AD7741BR is a single-channel synchronous voltage-to-frequency converter from Analog Devices, housed in an 8-lead Small Outline package. It operates on a single +5 V supply within the 4.75 V to 5.25 V range and supports an industrial temperature range of -40 °C to +85 °C. The device features a buffered analog input with a unipolar voltage range from 0 V to VREF. It includes an internal +2.5 V bandgap reference and accepts an external clock up to 6 MHz for stable frequency output generation.

Feature Summary

• Synchronous voltage-to-frequency conversion using charge-balance technique
• Integrated programmable gain analog front-end with buffered inputs
• Internal +2.5 V bandgap reference with external overdrive capability
• Low power standby mode via active low control pin

Applications

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

Procurement Notes

Verify the specific B version suffix indicates the -40 °C to +85 °C industrial operating range. Confirm the R-8 package option matches the required surface mount footprint. Ensure the datasheet revision aligns with current manufacturing specifications before finalizing procurement orders.

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 input channels. Consider the internal reference stability requirements and available external clock sources when designing the system architecture.

Part Context

This part belongs to the AD7741/AD7742 family of synchronous voltage-to-frequency converters. The AD7741 serves as the single-channel variant, while the AD7742 provides multi-channel capabilities. Both share similar core architectures but differ in pin counts and input configurations.

Replacement Considerations

The AD7741BN is a direct replacement offering the same electrical characteristics in a Plastic DIP package.