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MCP3202 Scheda tecnica(PDF) 12 Page - Microchip Technology

Il numero della parte MCP3202
Spiegazioni elettronici  2.7V Dual Channel 12-Bit A/D Converter with SPI Serial Interface
PDF  28 Pages
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Produttore elettronici  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP3202 Scheda tecnica(HTML) 12 Page - Microchip Technology

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MCP3202
DS21034D-page 12
© 2006 Microchip Technology Inc.
FIGURE 4-1:
Analog Input Model.
FIGURE 4-2:
Maximum Clock Frequency vs. Input
Resistance (R
S)
to maintain less than a 0.1 LSB
deviation in INL from nominal conditions.
C
PIN
VA
R
SS
CHx
7pF
V
T = 0.6V
V
T = 0.6V
I
LEAKAGE
Sampling
Switch
SS
R
S = 1 kΩ
C
SAMPLE
= DAC capacitance
V
SS
V
DD
= 20 pF
±1 nA
Legend
VA
=
signal source
R
SS
=
source impedance
CHx
=
input channel pad
C
PIN
=
input pin capacitance
V
T
=
threshold voltage
I
LEAKAGE
=
leakage current at the pin
due to various junctions
SS
=
sampling switch
R
S
=
sampling switch resistor
C
SAMPLE
=
sample/hold capacitance
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
100
1000
10000
Input Resistance (Ohms)
VDD = 5V
VDD = 2.7V



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