MCP3208 데이터 시트보기 (PDF) - Microchip Technology

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MCP3208

2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI® Serial Interface

Microchip Technology 

MCP3204/3208

ELECTRICAL CHARACTERISTICS (CONTINUED)

All parameters apply at VDD = 5V, VSS = 0V, VREF = 5V, TAMB = -40°C to +85°C, fSAMPLE = 100ksps and

fCLK = 20*fSAMPLE, unless otherwise noted.

PARAMETER

SYMBOL MIN. TYP. MAX. UNITS

CONDITIONS

Analog Inputs (Continued)

Switch Resistance

1K

Ω See Figure 4-1

Sample Capacitor

20

pF See Figure 4-1

Digital Input/Output

Data Coding Format

Straight Binary

High Level Input Voltage

VIH

0.7 VDD

V

Low Level Input Voltage

VIL

0.3 VDD

V

High Level Output Voltage

VOH

4.1

V IOH = -1mA, VDD = 4.5V

Low Level Output Voltage

VOL

0.4

V IOL = 1mA, VDD = 4.5V

Input Leakage Current

ILI

-10

10

µA VIN = VSS or VDD

Output Leakage Current

ILO

-10

10

µA VOUT = VSS or VDD

Pin Capacitance

(All Inputs/Outputs)

Timing Parameters

CIN, COUT

10

pF VDD = 5.0V (Note 1)

TAMB = 25°C, f = 1 MHz

Clock Frequency

Clock High Time

fCLK

tHI

250

2.0

MHz VDD = 5V (Note 3)

1.0

MHz VDD = 2.7V (Note 3)

ns

Clock Low Time

tLO

250

ns

CS Fall To First Rising CLK

tSUCS

100

ns

Edge

Data Input Setup Time

tSU

50

ns

Data Input Hold Time

tHD

50

ns

CLK Fall To Output Data Valid

tDO

200

ns See Test Circuits, Figure 1-2

CLK Fall To Output Enable

tEN

200

ns See Test Circuits, Figure 1-2

CS Rise To Output Disable

tDIS

100

ns See Test Circuits, Figure 1-2

CS Disable Time

tCSH

500

ns

DOUT Rise Time

tR

100

ns See Test Circuits, Figure 1-2

(Note 1)

DOUT Fall Time

tF

100

ns See Test Circuits, Figure 1-2

(Note 1)

Power Requirements

Operating Voltage

VDD

2.7

5.5

V

Operating Current

Standby Current

IDD

320 400

µA VDD = VREF = 5V, DOUT unloaded

225

VDD = VREF = 2.7V, DOUT unloaded

IDDS

0.5

2

µA CS = VDD = 5.0V

Note 1:

Note 2:

Note 3:

This parameter is guaranteed by characterization and not 100% tested.

See graphs that relate linearity performance to VREF levels.

Because the sample cap will eventually lose charge, effective clock rates below 10kHz can affect linearity

performance, especially at elevated temperatures. See Section 6.2 for more information.

© 1999 Microchip Technology Inc.

Preliminary

DS21298B-page 3

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