MCP3201-BI/MS データシートの表示（PDF） - Microchip Technology

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MCP3201-BI/MS

2.7V 12-Bit A/D Converter with SPI Serial Interface

Microchip Technology 

MCP3201

RSS CHx

VA

VDD

VT = 0.6V

CPIN

7 pF

VT = 0.6V

ILEAKAGE

±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

FIGURE 4-1:

Analog Input Model.

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

100

VDD = VREF = 5V

VDD = VREF = 2.7V

1000

Input Resistance (Ohms)

10000

FIGURE 4-2:

Maximum Clock Frequency

vs. Input Resistance (RS) to maintain less than a

0.1 LSB deviation in INL from nominal

conditions.

Sampling

Switch

SS RS = 1 kΩ

CSAMPLE

= DAC capacitance

= 20 pF

VSS

DS21290E-page 18

© 2008 Microchip Technology Inc.

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