RMS - DC 변환 모듈 -AD8436
(RMS TO DC 2 CLICK)
개요
- 본 제품은 RMS - DC 변환 모듈 -AD8436입니다.
- RMS-to-DC 컨버터 AD8436 칩을 탑재한 제품으로 RMS 입력 신호를 DC 전압으로 변경하여 주는 제품입니다.
- true RMS 신호를 측정하고자 하는 어플리케이션 개발 등에 사용이 가능한 제품입니다.
특징
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HOW DOES IT WORK?
RMS to DC 2 Click is based on the AD8436, a low-cost, low-power, true RMS-to-DC converter from Analog Devices. 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. The accuracy conversions crest factor spans between 1 and 10. On-board buffer amplifiers enable the widest range of options, while 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 RMS or Root Mean Square is used to describe the input signal's power: the current's RMS value is equal to a DC current value that would produce the same heat dissipation on the resistive load. Therefore, it is often important to know the RMS value of the signal. RMS to DC 2 Click allows measuring of the RMS value of a periodically repetitive signal.
The output values of the AD8436 can be read over the analog-to-digital converter of the host MCU or over the MCP3221, a low-power 12-bit ADC from Microchip. The selection can be made over the ADC SEL jumper, where the MCP3221 is set by default. There are two terminals on RMS to DC 2 Click. The VEXT supplies the RMS core of the AD8436 with a voltage of 4.8 to 36V, while the INPUT is the AC signal input terminal.
RMS to DC 2 Click can use the analog AN pin of the mikroBUS™ socket or the I2C interface of the MCP3221 to communicate with the host MCU and read the RMS value. The default choice is the MCP3221, with its standard and fast modes of the I2C interface supporting frequencies of up to 400KHz.
This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
SPECIFICATIONS
Type Measurements Applications Can be used for the development of various true RMS digital multimeter applications, panel meters and gauges, AC + DC measurement applications, a true RMS measurement of an audio signal, and other similar applications that require accurate RMS value readings On-board modules AD8436 - low-power true RMS-to-DC converter from Analog Devices Key Features Fast settling at the input level, high accuracy, wide dynamic input range, wide bandwidth, zero converter DC output offset, no residual switching products, accurate conversion with crest factors up to 10, precision DC output buffer, and more Interface Analog,I2C ClickID Yes Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V
