Key facts
- Brand
- Analog Devices
- Model
- AD737
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-03
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Analog Devices AD737 True RMS-to-DC Converter Datasheet
The AD737 is a low power, precision, monolithic, true RMS-to-DC converter designed to compute the RMS value of both AC and DC input voltages. It is laser trimmed to provide a maximum error of +0.2 mV + 0.3% of reading with sine wave inputs and maintains high accuracy for a wide range of input waveforms, including variable duty cycle pulses and triac controlled sine waves.
The device features a high input impedance of 10^17 Ohms and a low input bias current of 25 pA maximum. It operates with a wide power supply range from +2.5 V to +16.5 V and consumes only 160 µA of power supply current. The AD737 is available in two performance grades (AD737J and AD737K) for commercial temperature ranges and an AD737A grade for industrial temperature ranges.
Analog Devices AD737 specifications
| Total Error (0 to 200 mV rms) | +0.2 mV + 0.3% of reading |
|---|---|
| Input Resistance (High-Z) | 10^17 Ohms |
| Input Bias Current | 25 pA maximum |
| Power Supply Range | +2.5 V to +16.5 V |
| Standby Current | 25 µA typical |
| Operating Temperature (AD737A) | -40°C to +85°C |
Source: Analog Devices AD737 True RMS-to-DC Converter Datasheet
All Analog Devices AD737 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum error of the AD737 with sine wave inputs?
The maximum error is +0.2 mV + 0.3% of reading.
From: Analog Devices AD737 True RMS-to-DC Converter Datasheet
Does the AD737 require external trimming for specified accuracy?
No, no external trims are needed for the specified accuracy.
From: Analog Devices AD737 True RMS-to-DC Converter Datasheet
What is the allowable supply voltage range for the AD737?
The AD737 operates from +2.5 V up to +16.5 V.
How much power does the AD737 consume during normal operation?
It consumes only about 0.72 mW while active.