Rainbow-electronics DS1859 Manual do Utilizador descarregar pdf (Página 5)

DS1859

Dual, Temperature-Controlled Resistors with

Internally Calibrated Monitors

_____________________________________________________________________ 5

Note 10: After this period, the first clock pulse is generated.

Note 11: The maximum t

HD:DAT

only has to be met if the device does not stretch the LOW period (t

LOW

) of the SCL signal.

Note 12: A device must internally provide a hold time of at least 300ns for the SDA signal (see the V

IH MIN

of the SCL signal) to

bridge the undefined region of the falling edge of SCL.

Note 13: C

—total capacitance of one bus line, timing referenced to 0.9 x V

and 0.1 x V

Note 14: Guaranteed by design.

Typical Operating Characteristics

= 5.0V, T

= +25°C, for both 50kΩ and 20kΩ versions, unless otherwise noted.)

TEMPERATURE (°C)

40 60 80200-20

560

600

640

680

720

520

-40 100

SUPPLY CURRENT vs. TEMPERATURE

DS1859 toc01

SUPPLY CURRENT (µA)

SDA = SCL = V

SUPPLY CURRENT vs. VOLTAGE

DS1859 toc02

VOLTAGE (V)

SUPPLY CURRENT (µA)

5.04.54.03.5

450

500

550

600

650

700

400

3.0 5.5

SDA = SCL = V

RESISTANCE vs. SETTING

DS1859 toc03

SETTING (DEC)

RESISTANCE (kΩ)

20015010050

0250

50kΩ VERSION

RESISTANCE vs. SETTING

DS1859 toc04

SETTING (DEC)

RESISTANCE (kΩ)

20015010050

0250

20kΩ VERSION

ACTIVE SUPPLY CURRENT

vs. SCL FREQUENCY

DS1859 toc05

SCL FREQUENCY (kHz)

ACTIVE SUPPLY CURRENT (µA)

300200100

600

640

680

720

760

560

0400

SDA = V

RESISTOR 0 INL (LSB)

DS1859 toc06

SETTING (DEC)

RESISTOR 0 INL (LSB)

225200150 17550 75 100 12525

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

1.0

-1.0

0250

1 2 3 4 5 6 7 8 9 10 ... 27 28

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