MCP3911 datasheet(14/72 Pages) MICROCHIP

14 / 72 page

MCP3911

DS22286A-page 14

Note:

Unless otherwise indicated, AVDD = 3.3V, DVDD = 3.3 V; TA = 25°C, MCLK = 4 MHz; PRESCALE = 1;

OSR = 256; GAIN = 1; Dithering = Maximum; VIN = -0.5 dBFS @ 60 Hz, VREFEXT = 0; CLKEXT = 1,

AZ_FREQ = 0; BOOST = 1X.

FIGURE 2-19:

SFDR vs. MCLK.

FIGURE 2-20:

SINAD vs. GAIN.

FIGURE 2-21:

SINAD vs. GAIN (Dithering

Off).

FIGURE 2-22:

SINAD vs. GAIN vs. AZ

Speed Chart.

FIGURE 2-23:

THD vs. Input Signal

Amplitude.

FIGURE 2-24:

SINAD vs. Input Signal

Amplitude.

100

110

120

Boost = 0.5x

Boost = 0.66x

Boost = 2x

Boost = 1x

Frequency (MHz)

100

110

120

OSR = 32 OSR = 64

OSR = 128

OSR = 256

OSR = 4096

OSR = 2048

OSR = 1024

OSR = 512

1248

Gain (V/V)

100

1248

Gain (V/V)

Auto Zero Speed = Fast

Auto Zero Speed = Slow

-70

-60

-50

-40

-30

-20

-10

-120

-110

-100

-90

-80

-6

-5

-4

-3

-2

-1

Input Signal Amplitude (dBFS)

Channel 0

Channel 1

100

110

120

-6

-5

-4

-3

-2

-1

Input Signal Amplitude (dBFS)

Channel 0

Channel 1

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