MCP3004/3008
Note:
Unless otherwise indicated, V
DD
= V
REF
= 5V, f
CLK
= 18* f
SAMPLE
, T
A
= 25°C.
10.00
10.0
9.8
9.75
9.6
V
DD
= V
REF
= 2.7 V
f
SAMPLE
= 75 ksps
9.50
V
DD
= V
REF
= 5 V
f
SAMPLE
= 200 ksps
ENOB (rms)
ENOB (rms)
9.4
9.2
9.0
8.8
8.6
8.4
8.2
8.0
V
DD
= V
REF
= 2.7 V
f
SAMPLE
= 75 ksps
9.25
V
DD
= V
REF
= 5 V
f
SAMPLE
= 200 ksps
9.00
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
1
10
100
V
REF
(V)
Input Frequency (kHz)
FIGURE 2-25:
Effective Number of Bits (ENOB)
vs. V
REF
.
100
90
80
V
DD
= V
REF
= 5 V
f
SAMPLE
= 200 ksps
FIGURE 2-28:
Effective Number of Bits (ENOB)
vs. Input Frequency.
Power Supply Rejection (dB)
0
-10
-20
-30
-40
-50
-60
-70
1
10
100
1000
10000
V
DD
= V
REF
= 5 V
f
SAMPLE
= 200 ksps
SFDR (dB)
70
60
50
40
30
20
10
0
1
10
100
V
DD
= V
REF
= 2.7 V
f
SAMPLE
= 75 ksps
Input Frequency (kHz)
Ripple 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
20000
40000
V
DD
= V
REF
= 5 V
F
SAMPLE
= 200 ksps
F
INPUT
= 10.0097 kHz
4096 points
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)
60000
80000
100000
Amplitude (dB)
V
DD
= V
REF
= 2.7 V
f
SAMPLE
= 75 ksps
f
INPUT
= 1.00708 kHz
4096 points
10000 15000 20000 25000 30000 35000
Frequency (Hz)
Frequency (Hz)
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).
DS21295C-page 10
©
2007 Microchip Technology Inc.
MICROCHIP [ MICROCHIP TECHNOLOGY ]
