MCP3912 datasheet(11/82 Pages) MICROCHIP

11 / 82 page

 2014 Microchip Technology Inc.

DS20005348A-page 11

MCP3912

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 2-7:

THD Repeatability

Histogram.

FIGURE 2-8:

Spurious Free Dynamic

Range Repeatability Histogram.

FIGURE 2-9:

SINAD Repeatability

Histogram.

FIGURE 2-10:

Output Noise Histogram.

FIGURE 2-11:

THD vs.OSR.

FIGURE 2-12:

SINAD vs. OSR.

-108.2

-107.8

-107.4

-107.0

-106.6

-106.2

Total Harmonic Distortion ( dBc)

Total Harmonic Distortion (-dBc)

111.7

112.3

112.9

113.5

114.1

114.7

115.3

115.9

Spurious Free Dynamic Range (dBFS)

93.3

93.4

93.5

93.6

93.7

93.8

Signal to Noise and Distortion (dB)

Standar deviation = 78 LSB

Noise = 7.4 Vrms

16 ksamples

Output Noise (LSB)

-120

-115

-110

-105

-100

-95

-90

Dithering=Maximum

Dithering=Medium

Dithering=Minimum

Dithering=Off

-130

-125

128

256

512 1024 2048 4096

Oversampling Ratio (OSR)

110

100

105

Dithering=Maximu

Dithering Maximu

Dithering=Medium

128

256

512 1024 2048 4096

Oversampling Ratio (OSR)

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