DS1803 datasheet(7/11 Pages) DALLAS

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DS1803

7 of 11

ANALOG RESISTOR CHARACTERISTICS

(-40

°C to +85°C;V

CC=2.7V to 5.5V)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

End-to-End Resistor Tolerance

-20

+20

Absolute Linearity

±0.75

LSB

Relative Linearity

±0.3

LSB

-3 dB Cutoff Frequency

fCUTOFF

Temperature Coefficient

750

ppm/C

Capacitance

AC ELECTRICAL CHARACTERISTICS

(-40

°C to +85°C;V

CC=2.7V to 5.5V)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

SCL Clock Frequency

fSCI

400

100

kHz

Bus Free Time Between

STOP and START Condition

tBUF

1.3

4.7

µs

Hold Time (Repeated)

START Condition

tHD;STA

0.6

4.0

µs

Low Period of SCL Clock

tLOW

1.3

4.7

µs

High Period of SCL Clock

tHIGH

0.6

4.0

µs

Data Hold Time

tHD;DAT

0.9

µs

6,7

Data Setup Time

tHD;DAT

100

250

Rise Time of both SDA and

SCL Signals

20+1CB

300

1000

Fall Time of both SDA and

SCL Signals

20+1CB

300

Setup Time for STOP

Condition

tSU;STO

0.6

4.0

µs

Capacitive Load for each Bus

Line

400

NOTES:

1. All voltages are referenced to ground.

2. I/O pins of fast mode devices must not obstruct the SDA and SCL lines if VDD is switched off.

3. ICC specified with SDA pin open SCL = 400 kHz clock rate.

4. ICC specified with VCC at 5.0V and SDA, SCL = 5.0V, -40

°C to +85°C.

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