MCP3204 Microchip Technology, MCP3204 Datasheet - Page 13

• Manufacturer Part Number: MCP3204
• Description: 2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI Serial Interface
• Manufacturer: Microchip Technology

FIGURE 4-1: Analog Input Model
FIGURE 4-2: Maximum Clock Frequency vs. Input
resistance (R
deviation in INL from nominal conditions.
1999 Microchip Technology Inc.
Legend
VA
2.5
2.0
1.5
1.0
0.5
0.0
C
I
LEAKAGE
SAMPLE
100
R
CHx
C
R
SS
VA
R
PIN
V
S
SS
S
T
= Signal Source
= Source Impedance
= Input Channel Pad
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin
= Sampling Switch
= Sampling Switch Resistor
= Sample/Hold Capacitance
S
due to various junctions
) to maintain less than a 0.1LSB
CHx
Input Resistance (Ohms)
V
DD
V
= 2.7V
DD
1000
= 5V
C
7pF
PIN
V
DD
V
V
T
T
= 0.6V
= 0.6V
10000
Preliminary
I
LEAKAGE
1 nA
SS R
Sampling
Switch
MCP3204/3208
SS
= 1k
V
SS
C
= DAC capacitance
= 20 pF
SAMPLE
DS21298B-page 13