MCP3201
Note:
Unless otherwise indicated, V
DD
= V
REF
= 5V, V
SS
= 0V, f
SAMPLE
= 100 ksps, f
CLK
= 16*f
SAMPLE
, T
A
= +25°C.
12.0
11.5
11.0
12.00
11.75
11.50
11.25
11.00
10.75
10.50
10.25
10.00
9.75
9.50
9.25
9.00
0.0
0.5
1.0
V
DD
= 5V
F
SAMPLE
= 100 ksps
ENOB (rms)
ENOB (rms)
V
DD
= V
REF
= 5V
V
DD
= V
REF
= 2.7V
F
SAMPLE
= 50 ksps
F
SAMPLE
=100 ksps
10.5
10.0
9.5
9.0
8.5
8.0
V
DD
= 2.7V
F
SAMPLE
= 50 ksps
1
10
100
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
V
REF
(V)
Input Frequency (kHz)
FIGURE 2-25:
(ENOB) vs. V
REF
.
Effective Number of Bits
FIGURE 2-28:
Effective Number of Bits
(ENOB) vs. Input Frequency.
V
DD
= V
REF
= 5V, F
SAMPLE
= 100 ksps
Power Supply Rejection (dB)
100
90
80
70
60
50
40
30
20
10
0
1
0
-10
-20
-30
-40
-50
-60
-70
-80
1
10
100
1000
10000
Ripple Frequency (kHz)
SFDR (dB)
V
DD
= V
REF
= 2.7V
F
SAMPLE
= 50 ksps
10
Input Frequency (kHz)
100
FIGURE 2-26:
Spurious Free Dynamic
Range (SFDR) vs. Input Frequency.
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
0
10000
FIGURE 2-29:
Power Supply Rejection
(PSR) vs. Ripple Frequency.
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
0
5000
Amplitude (dB)
20000
30000
Frequency (Hz)
40000
50000
Amplitude (dB)
V
DD
= V
REF
= 5V
F
SAMPLE
= 100 ksps
F
INPUT
= 9.985kHz
4096 points
V
DD
= V
REF
= 2.7V
F
SAMPLE
= 50 ksps
F
INPUT
= 998.76 Hz
4096 points
10000
15000
Frequency (Hz)
20000
25000
FIGURE 2-27:
Frequency Spectrum of
10 kHz input (Representative Part).
FIGURE 2-30:
Frequency Spectrum of
1 kHz input (Representative Part, V
DD
= 2.7V).
©
2008 Microchip Technology Inc.
DS21290E-page 11
MICROCHIP [ MICROCHIP TECHNOLOGY ]
