The AD736 is a low power, precision, monolithic true rms-to-dc converter. It is laser trimmed to provide a maximum error of ±0.3 mV ± 0.3% of reading with sine wave inputs. Furthermore, it maintains high accuracy while measuring signals with crest factors as high as 5.
The Analog Devices AD736 is a low power, precision, monolithic true rms-to-dc converter designed for high accuracy in measuring various input waveforms. It is laser trimmed to provide a maximum error of ±0.3 mV ± 0.3% of reading with sine wave inputs and maintains high accuracy for variable duty-cycle pulses and triac-controlled sine waves. The device features a high input impedance of 10^12 Ω and low input bias current, making it suitable for battery-powered applications like portable multimeters.
| Input Resistance (High Impedance) | 10^12 Ω |
|---|---|
| Input Bias Current | 25 pA maximum |
| Operating Voltage Range | +2.8 V, −3.2 V to ±16.5 V |
| Quiescent Current (Zero signal) | 160 μA |
| Output Offset Voltage (J and K Grades) | ±0.1 mV |
| Temperature Range (Commercial) | 0°C to +70°C |
The maximum error is ±0.3 mV ± 0.3% of reading.
No, no external trims are needed for specified accuracy.
The AD736 provides a 200 mV full-scale input range, with larger inputs possible using an input attenuator.