DS1721 查看數據表（PDF） - Maxim Integrated

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DS1721

2-Wire Digital Thermometer and Thermostat

Maxim Integrated 

DC ELECTRICAL CHARACTERISTICS:

DIGITAL THERMOMETER

PARAMETER

SYMBOL CONDITION

-10°C to +85°C,

DS1721

Thermometer Error

TERR

3.0V≤VDD≤5.5V

-10°C to +85°C,

2.7V≤VDD<3.0V

-55°C to +125°C

Resolution

9-bit

Conversions

10-bit

Conversion Time

tCONVT

Conversions

11-bit

Conversions

12-bit

Conversions

DS1721

(-55°C to +125°C; 2.7V £ VDD £ 5.5V)

MIN TYP MAX UNITS NOTES

±1.0

°C

±1.5

°C

±2.0

°C

9

12

bits

93.75

187.5

ms

375

750

AC ELECTRICAL CHARACTERISTICS:

2-WIRE INTERFACE

PARAMETER

SYMBOL CONDITION

SCL Clock

Frequency

fSCL

Fast Mode

Standard Mode

Bus Free Time

Between a STOP

and START

tBUF

Fast Mode

Standard Mode

Condition

Hold Time

(Repeated) START

Condition

tHD:STA

Fast Mode

Standard Mode

Low Period of

SCL Clock

tLOW

Fast Mode

Standard Mode

High Period of

SCL Clock

tHIGH

Fast Mode

Standard Mode

Setup Time for a

Repeated START

Condition

tSU:STA

Fast Mode

Standard Mode

Data Hold Time

tHD:DAT

Fast Mode

Standard Mode

Data Set-up Time

tSU:DAT

Fast Mode

Standard Mode

Rise Time of both

SDA and SCL

Signals

tR

Fast Mode

Standard Mode

Fall Time of both

SDA and SCL

Signals

tF

Fast Mode

Standard Mode

Set-up time for

STOP Condition

tSU:STO

Fast Mode

Standard Mode

(-55°C to +125°C; VDD=2.7V to 5.5V)

MIN TYP MAX UNITS NOTES

0

0

400

100

KHz

1.3

4.7

µs

0.6

4.0

1.3

4.7

0.6

4.0

0.6

4.7

0

0

100

250

20+0.1

CB

20+0.1

CB

0.6

4.0

µs

5

µs

µs

µs

0.9

µs

6

ns

7

300

1000

ns

7

300

1000

ns

8

µs

15 of 17

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