Rainbow-electronics DS3903 Bedienungsanleitung PDF herunterladen (Seite 3)

DS3903

Triple 128-Position Nonvolatile

Digital Potentiometer

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AC ELECTRICAL CHARACTERISTICS

= 2.7V to 5.5V, T

= -40°C to +85°C.)

PARAMETER

SYMBOL

CONDITIONS MIN

TYP

MAX

UNITS

Fast mode (Note 4) 0

400

SCL Clock Frequency f

SCL

Standard mode (Note 4) 0

100

kHz

Fast mode (Note 4) 1.3

Bus Free Time Between Stop and

Start Conditions

BUF

Standard mode (Note 4) 4.7

µs

Fast mode (Notes 4, 5) 0.6

Hold Time (Repeated) Start

Condition

HD:STA

Standard mode (Notes 4, 5) 4.0

µs

Fast mode (Note 4) 1.3

Low Period of SCL Clock t

LOW

Standard mode (Note 4) 4.7

µs

Fast mode (Note 4) 0.6

High Period of SCL Clock t

HIGH

Standard mode (Note 4) 4.0

µs

Fast mode (Notes 4, 6, 7) 0 0.9

Data Hold Time

HD:DAT

Standard mode (Notes 4, 6, 7) 0 0.9

µs

Fast mode (Note 4) 100

Data Set-Up Time

SU:DAT

Standard mode (Note 4) 250

Fast mode 0.6

Start Set-Up Time t

SU:STA

Standard mode 4.7

µs

Fast mode (Note 8)

20 + 0.1C

300

Rise Time of Both SDA and SCL

Signals

Standard mode (Note 8)

20 + 0.1C

1000

Fast mode (Note 8)

20 + 0.1C

300

Fall Time of Both SDA and SCL

Signals

Standard mode (Note 8)

20 + 0.1C

300

Fast mode 0.6

Set-Up Time for Stop Condition

SU:STO

Standard mode 4.7

µs

Capacitive Load for Each Bus

(Note 8)

400

EEPROM Write Time t

(Note 9) 10 ms

Startup Time t

2ms

ANALOG RESISTOR CHARACTERISTICS

= 2.7V to 5.5V, T

= -40°C to +85°C.)

PARAMETER

SYMBOL

CONDITIONS MIN TYP MAX UNITS

End-to-End Resistance Tolerance

+25°C -20 +20 %

10kΩ Pot 10.5

End-to-End Resistance

90kΩ Pot 90

kΩ

Factory-Default Wiper Setting Position 127 (max resistance)

Wiper Resistance R

250 500 Ω

Absolute Linearity (Note 10) -1.0 +1.0 LSB

Relative Linearity (Note 11) -0.25 +0.25 LSB

End-to-End

Temperature Coefficient

-300 0 +300

ppm/°C

Ratiometric

Temperature Coefficient

±30

ppm/°C

1 2 3 4 5 6 7 8 9 10 11

Digital Potentiometer 1

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