Description

The AD736JRZ is an electronic component that belongs to the RMS-to-DC Converters category. It is a precision and low-power monolithic true RMS-to-DC converter. The converter has been trimmed by laser to provide a maximum error of ±0.3 mV ± 0.3% of reading with sine wave inputs and maintains high accuracy with a wide range of input waveforms, including variable duty-cycle pulses and triac (phase)-controlled sine waves. It is suitable for upgrading the performance of non-RMS precision rectifiers in many applications due to its low cost and small size. Compared to these circuits, the AD736JRZ offers higher accuracy at an equal or lower cost.

Specifications and features

• Converts an AC voltage waveform to a DC voltage and then converts it to the true RMS, average rectified, or absolute value.
• 200mV RMS full-scale input range (larger inputs with input attenuator)
• High input impedance: 10^12Ω
• Low input bias current: 25 pA maximum
• High accuracy: ±0.3mV ± 0.3% of reading
• RMS conversion with signal crest factors up to 5
• Wide power supply range: +2.8 V, −3.2 V to ±16.5 V
• Low power: 200 µA maximum supply current
• Buffered voltage output
• No external trims needed for specified accuracy
• Related device: the AD737—features a power-down control with standby current of only 25 μA; the DC output voltage is negative, and the output impedance is 8 kΩ

Application Scenarios

The AD736JRZ can be used in various applications that require high accuracy in measuring a wide range of input waveforms. It is particularly useful in systems where upgrading the performance of non-RMS precision rectifiers is necessary.

Comparison

• High accuracy while measuring a wide range of input waveforms
• Low power consumption
• Small physical size

• May not be suitable for all applications
• Requires power supply