Data Sheet

© 2006 Microchip Technology Inc. DS21034D-page 9
MCP3202
Note: Unless otherwise indicated, V
DD
= 5V, V
SS
= 0V, f
SAMPLE =
100 ksps, f
CLK
= 18* f
SAMPLE
,T
A
= 25°C
FIGURE 2-25: Effective Number of Bits (ENOB) vs.
V
DD
.
FIGURE 2-26: Spurious Free Dynamic Range
(SFDR) vs. Input Frequency.
FIGURE 2-27: Frequency Spectrum of 10 kHz input
(Representative Part).
FIGURE 2-28: Effective Number of Bits (ENOB) vs.
Input Frequency.
FIGURE 2-29: Power Supply Rejection (PSR) vs.
Ripple Frequency.
FIGURE 2-30: Frequency Spectrum of 1 kHz input
(Representative Part, V
DD
= 2.7V).
9.0
9.5
10.0
10.5
11.0
11.5
12.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0
V
DD
(V)
ENOB (rms)
F
SAMPLE
= 50ksps
F
SAMPLE
= 100 ksps
0
10
20
30
40
50
60
70
80
90
100
110100
Input Frequency (kHz)
SFDR (dB)
V
DD
= 2.7V
F
SAMPLE
= 50 ksps
V
DD
= 5V
F
SAMPLE
= 100 ksps
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0 10000 20000 30000 40000 50000
Frequency (Hz)
Amplitude (dB)
V
DD
= 5V
F
SAMPLE
= 100 ksps
F
INPUT
= 9.985 kHz
4096 points
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
110100
Input Frequency (kHz)
ENOB (rms)
V
DD
= 5V
F
SAMPLE
= 100 ksps
V
DD
= 2.7V
F
SAMPLE
= 50 ksps
-80
-70
-60
-50
-40
-30
-20
-10
0
1 10 100 1000 10000
Ripple Frequency (kHz)
Power Supply Rejection (dB)
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0 5000 10000 15000 20000 25000
Frequency (Hz)
Amplitude (dB)
V
DD
= 2.7V
F
SAMPLE
= 50 ksps
F
INPUT
= 998.76 Hz
4096 points