MCP3906 datasheet(13/30 Pages) MICROCHIP

13 / 30 page

DS21948E-page 13

MCP3905/06

3.14

High-Frequency Output (HFOUT)

HFOUT 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 HFC 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 2

ω ripple on the output should

be noted. However, the average period will show

minimal drift.

3.15

Frequency Output (FOUT0, FOUT1)

FOUT0 and FOUT1 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 Fc 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 2

ω ripple on the output

pulse period is minimal.

MCP3906 Datasheet(PDF) 13 Page - Microchip Technology