Datasheet

MCP3221
DS20001732E-page 10  2002-2017 Microchip Technology Inc.
Note: Unless otherwise indicated, V
DD
= 5V, V
SS
= 0V, I
2
C Fast Mode Timing (SCL = 400 kHz), Continuous Conversion
Mode (f
SAMP
= 22.3 ksps), T
A
= +25°C.
FIGURE 2-25: ENOB vs. V
DD
.
FIGURE 2-26: SFDR vs. Input Frequency.
FIGURE 2-27: Spectrum Using I
2
C Fast
Mode (Representative Part, 1 kHz Input
Frequency).
FIGURE 2-28: ENOB vs. Input Frequency.
FIGURE 2-29: Spectrum Using I
2
C
Standard Mode (Representative Part, 1 kHz
Input Frequency).
FIGURE 2-30: I
DD
(Conversion) vs. V
DD
.
11.5
11.55
11.6
11.65
11.7
11.75
11.8
11.85
11.9
11.95
12
2.533.544.555.5
V
DD
(V)
ENOB (rms)
0
10
20
30
40
50
60
70
80
90
100
110
Input Frequency (kHz)
SFDR (dB)
V
DD
= 2.7V
V
DD
= 5V
-130
-110
-90
-70
-50
-30
-10
10
0 2000 4000 6000 8000 10000
Frequency (Hz)
Amplitude (dB)
9
9.5
10
10.5
11
11.5
12
110
Input Frequency (kHz)
ENOB (rms)
V
DD
= 2.7V
V
DD
= 5V
-130
-110
-90
-70
-50
-30
-10
10
0 500 1000 1500 2000 2500
Frequency (Hz)
Amplitude (dB)
f
SAMP
= 5.6 ksps
0
50
100
150
200
250
2.533.544.555.5
V
DD
(V)
I
DD
(µA)