AD736AR-REEL7

Overview

The AD736AR-REEL7 is a low-power, precision monolithic true RMS-to-DC converter manufactured by Analog Devices Inc. It is laser-trimmed to provide a maximum error of ±0.3 mV plus 0.3% of reading with sine wave inputs. The device converts AC voltage waveforms to DC, supporting true RMS, average rectified, or absolute value outputs. It features a 200 mV RMS full-scale input range and high input impedance of 10^12 Ω. Key electrical parameters include a maximum supply current of 200 µA, a wide power supply range from +2.8 V/-3.2 V to ±16.5 V, and a maximum input bias current of 25 pA.

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 and triac-controlled sine waves
• Provides buffered voltage output without requiring external trims for specified accuracy
• Operates with low power consumption suitable for battery-powered applications

Applications

• Portable multimeters
• Battery-powered instrumentation
• Upgrading non-RMS precision rectifiers
• Signal processing in industrial automation

Procurement Notes

Verify the specific suffix AR-REEL7 against official Analog Devices documentation to confirm reel packaging and temperature grade. Ensure compatibility with system voltage requirements ranging from +2.8 V/-3.2 V to ±16.5 V. Confirm RoHS compliance status through the manufacturer's latest datasheet before integration.

Selection Notes

Select this component when precise RMS conversion is required for complex waveforms beyond simple sine waves. It is appropriate for designs prioritizing low power consumption and high input impedance. Consider the 200 mV RMS full-scale range and whether an input attenuator is necessary for larger signals compared to alternatives like the AD737.

Part Context

The AD736 series represents Analog Devices' solution for accurate RMS-to-DC conversion in a compact form factor. The AD736AR-REEL7 variant specifically denotes the automotive or extended temperature grade version packaged in reels for surface-mount assembly. It belongs to a family designed to replace discrete precision rectifier circuits with higher accuracy at lower cost.

Replacement Considerations

The AD737 is a related device featuring power-down control and negative DC output. Verify pinout compatibility and output polarity differences when substituting. Check if the standby current requirement of the AD737 aligns with system power constraints.