AD8436ACPZ-R7 Description

AD8436 is a new generation, translinear precision, low power, true rms-to-dc converter loaded with options. It computes a precise dc equivalent of the rms value of ac waveforms, including complex patterns such as those generated by switch mode power supplies and triacs. Its accuracy spans a wide range of input levels and temperatures. The device delivers true rms results at less cost than misleading peak, averaging, or digital solutions. There is no programming expense or processor overhead to consider. The built-in high impedance FET buffer provides an interface for external attenuators, frequency compensation, or driving low impedance loads. A matched pair of internal resistors enables an easily configurable gain-of-two or more, extending the usable input range even lower. The low power, precision input buffer makes the device attractive for use in portable multi-meters and other battery-powered applications.

AD8436ACPZ-R7 Features

• 65kHz for additional 1% error

• -3dB bandwidth is 1MHz at (300mV)

• Operating temperature is -40°C to +125°C

• 100µV rms to 3V rms (8.5V p-p) full-scale input range

• Packaging style is 20-lead lead frame chip scale [LFCSP]

• Supply current is 325µA typ at (no input), ESD protected

• Zero converter DC output offset, no residual switching products

• Accuracy is ±10µV ±0.5% of reading, larger inputs with external scaling

• Power supply voltage range is ±2.4V to ±18V (dual), 4.8V to 36V (single)

• Specified at 300mV rms input, accurate conversion with crest factors up to 10

AD8436ACPZ-R7 Applications

• Industrial

• Automotive

• Enterprise systems