MCP3901A1T-ISLASHSS datasheet(10/60 Pages) MICROCHIP

10 / 60 page

MCP3901

DS22192A-page 10

Note: Unless otherwise indicated, AVDD = 5.0V, DVDD = 5.0 V; TA = +25°C, MCLK = 4 MHz; PRESCALE = 1;

OSR = 64; GAIN = 1; Dithering OFF; VIN = -0.5dBFS @ 60 Hz.

FIGURE 2-7:

Spectral Response.

FIGURE 2-8:

Spectral Response.

FIGURE 2-9:

Spurious Free Dynamic

Range Histogram.

FIGURE 2-10:

Spurious Free Dynamic

Range vs. Oversampling Ratio.

FIGURE 2-11:

Signal-to-Noise and

Distortion and Effective Number of Bits vs.

Oversampling Ratio.

FIGURE 2-12:

Signal-to-Noise and

Distortion vs. Gain.

-180

-160

-140

-120

-100

-80

-60

-40

-20

2000

4000

6000

8000

Frequency (Hz)

fIN = -0.5dBFS @ 60 Hz

fD = 15.6 ksps

16384 Point FFT

OSR = 64

Dithering ON

-200

-180

-160

-140

-120

-100

-80

-60

-40

-20

2000

4000

6000

8000

Frequency (Hz)

fIN = -60dBFS @ 60 Hz

fD = 15.6 ksps

16384 Point FFT

OSR = 64

Dithering ON

107 107.5 108 108.5 109 109.5 110 110.5 111

Spurious Free Dynamic Range (dB)

fIN = 60 Hz

MCLK = 4 MHz

OSR = 256

Dithering On

100

110

120

128

256

Oversampling Ratio (OSR)

Dithering OFF

Dithering ON

100

128

256

Oversampling Ratio (OSR)

Dithering ON

Dithering OFF

124

Gain (V/V)

OSR = 256

OSR = 32

OSR = 64

OSR = 128

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