MCP3909 datasheet(12/44 Pages) MICROCHIP

12 / 44 page

MCP3909

DS22025B-page 12

Note: Unless otherwise specified, DVDD, AVDD = 5V; AGND, DGND = 0V; VREF = Internal, HPF = 1 (AC mode),

MCLK = 3.58 MHz, CH1 input = 660 mVP-P at 50 Hz, CH0 amplitude sweeps at 50 Hz.

FIGURE 2-19:

Active Power Measurement

Error with External VREF (G = 2, PF = 0.5).

FIGURE 2-20:

Active Power Measurement

Error with External VREF (G = 8, PF = 1).

FIGURE 2-21:

Active Power Measurement

Error with External VREF (G = 8, PF = 0.5).

FIGURE 2-22:

Active Power Measurement

Error with External VREF (G = 16, PF = 1).

FIGURE 2-23:

Active Power Measurement

Error with External VREF (G =16, PF = 0.5).

FIGURE 2-24:

Signal-to-Noise and

Distortion Ratio vs. Input Signal Amplitude

(G = 1).

-1

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

0.0001

0.0010

0.0100

0.1000

1.0000

CH1 Vp-p Amplitude (V)

+85°C

+25°C

-40°C

-1

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

0.0000

0.0001

0.0010

0.0100

0.1000

CH1 Vp-p Amplitude (V)

+85°C

+25°C

-40°C

-1

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

0.0000

0.0001

0.0010

0.0100

0.1000

CH1 Vp-p Amplitude (V)

+85°C

+25°C

-40°C

-1

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

0.0000

0.0001

0.0010

0.0100

0.1000

CH1 Vp-p Amplitude (V)

+85°C

+25°C

- 40°C

-1

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

0.0000

0.0001

0.0010

0.0100

0.1000

CH1 Vp-p Amplitude (V)

+85°C

+25°C

-40°C

100

0.0001

0.0010

0.0100

0.1000

1.0000

CH0 Vp-p Amplitude (V)

100

SINAD (dBFS)

SINAD(dB)

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