MCP3201_08 Datasheet, PDF (11/36 Pages) Microchip Technology – 2.7V 12-Bit A/D Converter with SPI Serial Interface

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.
12.00
11.75
11.50
11.25
11.00
10.75
10.50
10.25
10.00
V_DD = V_REF = 2.7V
F_SAMPLE = 50 ksps
V_DD = V_REF = 5V
F_SAMPLE =100 ksps
9.75
9.50
9.25
9.00
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
FIGURE 2-25:
(ENOB) vs. V_REF.
VREF (V)
Effective Number of Bits
12.0
11.5
11.0
10.5
10.0
9.5
9.0
8.5
8.0
1
V_DD = 5V
F_SAMPLE = 100 ksps
V_DD = 2.7V
F_SAMPLE = 50 ksps
10
100
Input Frequency (kHz)
FIGURE 2-28:
Effective Number of Bits
(ENOB) vs. Input Frequency.
100
90
80
70
60
50
40
30
20
10
0
1
V_DD = V_REF = 5V, F_SAMPLE = 100 ksps
V_DD = V_REF = 2.7V
F_SAMPLE = 50 ksps
10
100
Input Frequency (kHz)
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
V_DD = V_REF = 5V
F_SAMPLE = 100 ksps
F_INPUT = 9.985kHz
4096 points
10000 20000 30000 40000 50000
Frequency (Hz)
FIGURE 2-27:
Frequency Spectrum of
10 kHz input (Representative Part).
0
-10
-20
-30
-40
-50
-60
-70
-80
1
10
100
1000
Ripple Frequency (kHz)
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
V_DD = V_REF = 2.7V
F_SAMPLE = 50 ksps
F_INPUT = 998.76 Hz
4096 points
5000 10000 15000 20000 25000
Frequency (Hz)
FIGURE 2-30:
Frequency Spectrum of
1 kHz input (Representative Part, V_DD = 2.7V).
© 2008 Microchip Technology Inc.
DS21290E-page 11