MCP3004/3008
Note: Unless otherwise indicated, VDD = VREF = 5V, fCLK = 18* fSAMPLE, TA = 25°C.
10.0
9.8
9.6
9.4
9.2
9.0
8.8
8.6
8.4
8.2
8.0
10.00
9.75
9.50
9.25
9.00
VDD = VREF = 5 V
SAMPLE = 200 ksps
f
VDD = VREF = 2.7 V
fSAMPLE = 75 ksps
VDD = VREF = 2.7 V
SAMPLE = 75 ksps
VDD = VREF = 5 V
SAMPLE = 200 ksps
f
f
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VREF (V)
1
10
100
Input Frequency (kHz)
FIGURE 2-25: Effective Number of Bits (ENOB)
vs. VREF
FIGURE 2-28: Effective Number of Bits (ENOB)
vs. Input Frequency.
.
100
90
80
70
60
50
40
30
20
10
0
0
VDD = VREF = 5 V
SAMPLE = 200 ksps
VDD = VREF = 5 V
f
fSAMPLE = 200 ksps
-10
-20
-30
-40
-50
-60
-70
VDD = VREF = 2.7 V
SAMPLE = 75 ksps
f
1
10
100
1000
10000
1
10
100
Ripple Frequency (kHz)
Input Frequency (kHz)
FIGURE 2-26: Spurious Free Dynamic Range
FIGURE 2-29: Power Supply Rejection (PSR)
(SFDR) vs. Input Frequency.
vs. Ripple Frequency.
0
0
VDD = VREF = 5 V
FSAMPLE = 200 ksps
INPUT = 10.0097 kHz
4096 points
VDD = VREF = 2.7 V
-10
-20
-10
fSAMPLE = 75 ksps
-20
-30
F
fINPUT = 1.00708 kHz
-30
-40
4096 points
-40
-50
-50
-60
-60
-70
-70
-80
-80
-90
-90
-100
-110
-120
-130
-100
-110
-120
-130
0
20000
40000
60000
80000
100000
0
5000 10000 15000 20000 25000 30000 35000
Frequency (Hz)
Frequency (Hz)
FIGURE 2-27: Frequency Spectrum of 10 kHz
FIGURE 2-30: Frequency Spectrum of 1 kHz
Input (Representative Part).
Input (Representative Part, VDD = 2.7V).
DS21295C-page 10
© 2007 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
