Rainbow-electronics DS1722 Manual do Utilizador descarregar pdf (Página 10)

DS1722

10 of 13

ELECTRICAL CHARACTERISTICS: DIGITAL THERMOMETER

(-55°

°°

°C to +120°

°°

°C, 2.65V ≤

≤≤

≤=

DDA

≤

≤≤

≤=

=5.5V)

PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTES

-40°C to +85°C ±2.0

Thermometer Error T

ERR

-55°C to +120°C ±3.0

°C

8, 9

Resolution 8 12 bits

8-bit conversions 67.5 75

9-bit conversions 125 150

10-bit conversions 250 300

11-bit conversions 500 600

Conversion Time t

CONVT

12-bit conversions 1000 1200

AC ELECTRICAL CHARACTERISTICS: 3-WIRE INTERFACE

(-55°C to +120°C, 2.65V ≤=V

≤=5.5V)

PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTES

Data to SCLK Setup t

35 ns 5, 6

SCLK to Data Hold t

CDH

35 ns 5, 6

SCLK to Data Valid t

CDD

80 ns 5, 6, 7

SCLK Low Time t

100 ns 6

SCLK High Time t

100 ns 6

SCLK Frequency t

CLK

DC 5.0 MHz 6

SCLK Rise and Fall t

, t

200 ns

CE to SCLK Setup t

400 ns 6

SCLK to CE Hold t

CCH

100 ns 6

CE Inactive Time t

CWH

400 ns 6

CE to Output High Z t

CDZ

40 ns 5, 6

SCLK to Output High Z t

CCZ

40 ns 5, 6

TIMING DIAGRAM: 3-WIRE READ DATA TRANSFER Figure 9

1 2 ... 5 6 7 8 9 10 11 12 13

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