Datasheet

 2012-2013 Microchip Technology Inc. DS20002286B-page 11
MCP3911
2.0 TYPICAL PERFORMANCE CURVES
Note: Unless otherwise indicated, AV
DD
= 3.3V, DV
DD
= 3.3V; T
A
= +25°C, MCLK = 4 MHz; PRESCALE = 1;
OSR = 256; GAIN = 1; Dithering = Maximum; V
IN
= -0.5 dBFS at 60 Hz, VREFEXT = 0; CLKEXT = 1, AZ_FREQ = 0;
BOOST = 1X.
FIGURE 2-1: Spectral Response.
FIGURE 2-2: Spectral Response.
FIGURE 2-3: THD Histogram.
FIGURE 2-4: Spectral Response.
FIGURE 2-5: Spectral Response.
FIGURE 2-6: SINAD Histogram.
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Amplitude (dB)
Frequency (Hz)
f
IN
= -0.5 dBFS @ 60 Hz
f
D
= 3.9 ksps
16384 pt FFT
OSR = 256
Dithering = None
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Amplitude (dB
Frequency (Hz)
f
IN
= -60 dBFS@ 60 Hz
f
D
= 3.9 ksps
16384 pt FFT
OSR = 256
Dithering = None
-107.3 -107.1 -107.0 -106.8 -106.7 -106.5 -106.4 -106.2 -106.1 -105.9 -105.8
Frequency of Occurrence
Total Harmonic Distortion (-dBc)
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Amplitude (dB)
Frequency (Hz)
f
IN
= -0.5 dBFS @ 60 Hz
f
D
= 3.9 ksps
16384 pt FFT
OSR = 256
Dithering = Maximum
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Amplitude (dB)
Frequency (Hz)
f
IN
= -60 dBFS @ 60 Hz
f
D
= 3.9 ksps
16384 pt FFT
OSR = 256
Dithering = Maximum
94.2 94.3 94.5 94.6 94.8 94.9 95.1 95.2 95.4 95.5
Frequency of Occurrence
Signal-to-Noise and Distortion Ratio (dB)