DS1825 Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID

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AC ELECTRICAL CHARACTERISTICS: NV MEMORY

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

NV Write Cycle Time

2

10

ms

EEPROM Writes

-55°C to +55°C

50k

writes

EEPROM Data Retention

-55°C to +55°C

10

years

AC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

NOTES

9-bit resolution

93.75

ms

1

10-bit resolution

187.5

ms

1

11-bit resolution

375

ms

1

Temperature Conversion

Time

12-bit resolution

750

ms

1

Time to Strong Pullup On

Start Convert T

Command Issued

10

µs

Time Slot

60

120

µs

1

Recovery Time

1

µs

1

Write 0 Low Time

60

120

µs

1

Write 1 Low Time

1

15

µs

1

Read Data Valid

15

µs

1

Reset Time High

480

µs

1

Reset Time Low

480

µs

1, 2

Presence Detect High

15

60

µs

1

Presence Detect Low

60

240

µs

1

Capacitance: DQ

25

pF

Capacitance: AD0-AD3

50

pF

NOTES:

1.

Refer to timing diagrams in Figure 18.

2.

ms, a power on reset may occur.

Table 1. DETAILED PIN DESCRIPTIONS

PIN

SYMBOL

DESCRIPTION

4

GND

Ground.

2

DQ

Data Input/Output pin. Open-drain 1-Wire interface pin. Also

provides power to the device when used in parasite power mode

(see Parasite Power section.)

1

power mode.

5

AD0

Location Address Input Pin LSB

6

AD1

Location Address Input Pin

7

AD2

Location Address Input Pin

8

AD3

Location Address Input Pin MSB

3

N.C.

No Connection