MCP3906 datasheet(7/26 Pages) MICROCHIP

7 / 26 page

DS21948C-page 7

MCP3905/06

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

MCLK = 3.58 MHz.

FIGURE 2-11:

Measurement Error vs.

Input Frequency.

FIGURE 2-12:

Channel 0 Offset Error

(DC Mode, HPF off), G = 1.

FIGURE 2-13:

Channel 0 Offset Error

(DC Mode, HPF off), G = 8.

FIGURE 2-14:

Channel 0 Offset Error

(DC Mode, HPF Off), G = 16.

FIGURE 2-15:

Measurement Error vs. VDD

(G = 16).

FIGURE 2-16:

Measurement Error vs. VDD,

G = 16, External VREF.

-0.5

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

0.4

0.5

Frequency (Hz)

PF = 1.0

PF = 0.5

500

1000

1500

2000

2500

3000

Channel 0 Offset (mV)

16384 Samples

Mean = -1.57 mV

Std. Dev = 52.5 µV

200

400

600

800

1000

1200

Channel 0 Offset (mV)

16384 Samples

Mean = -1.64 mV

Std. Dev = 17.4 µV

500

1000

1500

2000

2500

3000

3500

4000

Bin (mV)

16384 Samples

Mean = - 1.28 mV

Std. dev = - 18.1 µV

-0.5

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

0.0001

0.0010

0.0100

0.1000

1.0000

CH0 Vp-p Amplitude (V)

VDD=4.75V

VDD=5.0V

VDD=4.5V

VDD=5.25V

VDD=5.5V

-0.15

-0.1

-0.05

0.05

0.1

0.15

0.2

0.25

0.3

0.0001

0.0010

0.0100

0.1000

1.0000

CH0 Vp-p Amplitude (V)

VDD=4.5V

VDD=4.75V

VDD=5.0V

VDD=5.25V

VDD=5.5V

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