MCP3918 datasheet(15/88 Pages) MICROCHIP

15 / 88 page

 2014 Microchip Technology Inc.

DS20005287A-page 15

MCP3918

Note:

Unless otherwise indicated, AVDD =3V, DVDD =3V; TA = +25°C, MCLK = 4 MHz; PRESCALE = 1;

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

BOOST<1:0> = 10.

FIGURE 2-25:

SNR vs. Input Signal

Amplitude.

FIGURE 2-26:

SFDR vs. Input Signal

Amplitude.

FIGURE 2-27:

SINAD vs. Input Frequency.

FIGURE 2-28:

THD vs. Temperature.

FIGURE 2-29:

SINAD vs. Temperature.

FIGURE 2-30:

SNR vs. Temperature.

-20

100

0.001

0.01

0.1

100

1000

Input Signal Amplitude (mV

PK)

GAIN = 1x

GAIN = 2x

GAIN = 4x

GAIN = 8x

GAIN = 16x

GAIN = 32x

100

120

140

0.001

0.01

0.1

100

1000

Input Signal Amplitude (mV

PK)

GAIN = 1x

GAIN = 2x

GAIN = 4x

GAIN = 8x

GAIN = 16x

GAIN = 32x

100

120

100

1000

10000

100000

Signal Frequency (Hz)

OSR = 32

OSR = 64

OSR = 128

OSR = 256

OSR = 512

OSR = 1024

OSR = 2048

OSR = 4096

-120

-100

-80

-60

-40

-20

-50

-25

100

125

Temperature (°C)

GAIN = 1x

GAIN = 2x

GAIN = 4x

GAIN = 8x

GAIN = 16x

GAIN = 32x

100

-50

-25

100

125

Temperature (°C)

GAIN = 1x

GAIN = 2x

GAIN = 4x

GAIN = 8x

GAIN = 16x

GAIN = 32x

100

-50

-25

100

125

Temperature (°C)

GAIN = 1x

GAIN = 2x

GAIN = 4x

GAIN = 8x

GAIN = 16x

GAIN = 32x

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