Datasheet

MCP3905/06

3.14 High-Frequency Output (HF

OUT

)

OUT

is the high-frequency output of the device and

supplies the instantaneous real-power information. The

output is a periodic pulse output, with its period

proportional to the measured active (real) power, and to

the HF

constant defined by F0, F1 and F2 pin logic

states. This output is the preferred output for calibration

due to faster output frequencies, giving smaller

calibration times. Since this output gives instantaneous

active (real) power, the 2ω ripple on the output should

be noted. However, the average period will show

minimal drift.

3.15 Frequency Output (F

OUT0

, F

OUT1

)

OUT0

and F

OUT1

are the frequency outputs of the

device that supply the average real-power information.

The outputs are periodic pulse outputs, with its period

proportional to the measured active (real) power, and to

the F

constant, defined by the F0 and F1 pin logic

states. These pins include high-output drive capability

for direct use of electromechanical counters and

2-phase stepper motors. Since this output supplies

average active (real) power, any 2ω ripple on the output

pulse period is minimal.