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MCP3002 Arkusz danych(PDF) 14 Page - Microchip Technology

Numer części MCP3002
Szczegółowy opis  2.7V Dual Channel 10-Bit A/D Converter with SPI Serial Interface
PDF  34 Pages
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Producent  MICROCHIP [Microchip Technology]
Strona internetowa  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP3002 Arkusz danych(HTML) 14 Page - Microchip Technology

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MCP3002
DS21294E-page 14
 2000-2011 Microchip Technology Inc.
FIGURE 4-1:
Analog Input Model.
FIGURE 4-2:
Maximum Clock Frequency
vs. Input resistance (RS) to maintain less than a
0.1 LSB deviation in INL from nominal
conditions.
CPIN
VA
RSS CHx
7pF
VT = 0.6V
VT = 0.6V
ILEAKAGE
Sampling
Switch
SS
RS = 1 kW
CSAMPLE
= DAC capacitance
VSS
VDD
= 20 pF
±1 nA
Legend
VA
=
signal source
RSS = source impedance
CHx
=
input channel pad
CPIN = input pin capacitance
VT = threshold voltage
ILEAKAGE = leakage current at the pin due to various junctions
SS
=
sampling switch
RS = sampling switch resistor
CSAMPLE = sample/hold capacitance
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
100
1000
10000
Input Resistance (Ohms)
VDD = 5V
fSAMPLE = 200 ksps
VDD = 2.7V
fSAMPLE = 75 ksps



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