Rainbow-electronics DS2422 Bedienungsanleitung PDF herunterladen (Seite 3)

DS2422

3 of 48

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

I/O Pin, 1-Wire Write

Standard speed 60 120

Overdrive speed, V

PUP

> 4.5V

(Note 12)

6

12

Write-0 Low Time (Note 1) t

W0L

Overdrive speed (Note 12) 7.5 12

µs

Standard speed 5

15 - e

Write-1 Low Time

(Notes 1, 14)

t

W1L

Overdrive speed 1

1.95 - e

µs

I/O Pin, 1-Wire Read

Standard speed 5

15 - d

Read Low Time

(Notes 1, 15)

t

RL

Overdrive speed 1

1.95 - d

µs

Standard speed

t

RL

+ d

15

Read Sample Time

(Notes 1, 15)

t

MSR

Overdrive speed

t

RL

+ d

1.95

µs

ALARM Output Pin

Output Low Voltage V

OL

Sink current 4mA 0.6 V

Pin Leakage Current I

LP

ALARM pin at 6V 6 µA

CNVST, SCLK Output Pins

V

PAD

= 5V, I

L

= 3mA 0.3

Output Low Voltage V

OL

V

PAD

= 3V, I

L

= 3mA 0.3

V

V

PAD

= 5V, I

L

= 3mA 4

Output High Voltage V

OH

V

PAD

= 3V, I

L

= 3mA 2

V

PUMP_ONZ Output Pin

V

BAT

= 3.6V, I

L

= 2mA 0.4

Output Low Voltage V

OL

V

BAT

= 2.0V, I

L

= 2mA 0.4

V

Output High Voltage V

BAT

= 3.6V, I

L

= 0.5mA 2.5

V

OH

V

BAT

= 2.0V, I

L

= 0.5mA 1.4

V

SDATA Input Pin

V

BAT

= 3.6V 2.5

Input High Voltage V

IH

V

BAT

= 2.0V 1.4

V

V

BAT

= 3.6V 0.4

Input Low Voltage V

IL

V

BAT

= 2.0V 0.4

V

Pin Leakage Current I

LP

SDATA pin at 5.5V 10 µA

Serial Interface Timing

CLK Period t

RING

0.5 1 9 µs

PUMP_ONZ Fall to

CNVST Rise

t

SP

Power-on default (Notes 4, 19)

3.5 4 4.5

ms

CNVST Pulse Width t

CPW

(Note 4) 70 140 1260 µs

CNVST Fall to SCLK High

(First Clock)

t

SCH

(Note 4) 8 16 144 µs

SCLK Period t

SCP

50% duty cycle (Note 4) 1 2 18 µs

SDATA Setup Time t

SDS

(Note 4) 75 ns

SDATA Hold Time t

SDH

(Note 4) 3 ns

Real-Time Clock

Accuracy +25°C (Note 16) -2 +2

min./

month

Frequency Deviation

D

F

-40°C to +85°C (Note 16) -300 +60 PPM

Temperature Converter

Operating Range T

TC

3V at V

BAT

-40 +85 °C

8-bit mode 30 50 75

Conversion Time (Note 4) t

CONV

16-bit mode (11 bits) 240 400 600

ms

Thermal Response Time

Constant (Notes 4, 17)

t

RESP

SO package 95 s

+10°C to +60°C

Conversion Error

(Notes 4, 18)

DJ

-40°C to +85°C

See Temperature Accuracy

Graphs

°C

Conversion Current I

CONV

(Note 4) 180 350 550 µA

1 2 3 4 5 6 7 8 ... 47 48

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