AD736KR-REEL

Overview

The AD736KR-REEL is a low-power, precision monolithic true RMS-to-DC converter manufactured by Analog Devices Inc. It features laser trimming for high accuracy with a maximum error of ±0.3 mV ± 0.3% of reading on sine wave inputs. The device supports a wide power supply range from +2.8 V, −3.2 V to ±16.5 V and consumes a maximum supply current of 200 µA. It provides a buffered voltage output without requiring external trims and handles signal crest factors up to 5.

Feature Summary

• Converts AC voltage waveforms to DC representing true RMS, average rectified, or absolute values
• Maintains high accuracy across diverse input waveforms including variable duty-cycle pulses
• Features high input impedance and low input bias current for minimal circuit loading

Applications

• Portable multimeters and battery-powered measurement instruments
• Upgrading performance of non-RMS precision rectifier circuits
• Signal processing applications involving triac-controlled sine waves

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging configuration distinct from tube variants. Confirm that the component matches the AD736 series specifications regarding power supply requirements and output buffering. Ensure compatibility with existing PCB footprints and thermal management strategies during integration.

Selection Notes

Select this component when precise RMS conversion is required for complex waveforms beyond simple sinusoids. Consider its low power consumption suitable for battery-operated systems. Evaluate the need for buffered outputs versus open-collector alternatives found in related devices like the AD737.

Part Context

This part belongs to the AD736 family of analog converters designed for cost-effective precision measurements. It serves as an alternative to discrete solutions offering higher accuracy at lower costs. The device integrates essential functions into a compact form factor suitable for modern electronic designs.

Replacement Considerations

The AD737 offers similar functionality but includes power-down control and negative output polarity. Verify if standby current requirements or output polarity differences necessitate circuit modifications when substituting.