Rainbow-electronics MAX6690 Instrukcja Użytkownika Pobierz pdf (Strona 3)

MAX6690

2°C Accurate Remote/Local Temperature

Sensor with SMBus Serial Interface

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= +3V to +5.5V, T

= -55°C to +125°C, unless otherwise noted. Typical values are at V

= +3.3V and T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Logic Input Low Voltage V

= +3.0V to +5.5V +0.8 V

= +3.0V +2.2

Logic Input High Voltage V

= +5.5V +2.6

Input Leakage Current I

LEAK

= GND or V

±2µA

= +0.6V +6

Output Low Sink Current I

= +0.4V +1

Input Capacitance C

+5 pF

Output High Leakage Current V

= +5.5V +1 µA

Serial Clock Frequency f

SCL

(Note 4) 0 +100 kHz

Bus Free Time Between STOP

and START Conditions

BUF

+4.7 µs

START Condition Setup Time +4.7 µs

Repeat START Condition Setup

Time

SU:STA

90% to 90% +50 µs

START Condition Hold Time t

HD:STA

10% of SMBDATA to 90% of SMBCLK +4 µs

STOP Condition Setup Time t

SU:STO

90% of SMBCLK to 10% of SMBDATA662 +4 µs

Clock Low Period t

LOW

10% to 10% +4.7 µs

Clock High Period t

HIGH

90% to 90% +4 µs

Data Setup Time t

SU:DAT

90% of SMBDATA to 10% of SMBCLK +250 ns

Data Hold Time t

HD:DAT

(Note 5) 0 µs

Receive SCL/SDA Rise Time t

+1 µs

Receive SCL/SDA Fall Time t

+300 ns

SMBus Timeout t

TIMEOUT

SMBDATA and SMBCLK time low for reset

of serial interface

+25 +40 ms

Note 1: +25°C ≤ T

≤ +85°C.

Note 2: If both the MAX6690 and the remote junction are below T

= -20°C, then V

> 3.15V.

Note 3: The conversion time doubles for the extended resolution mode. This causes the average operating current to approximately

double.

Note 4: The serial interface resets when SMBCLK is low for more than t

TIMEOUT

Note 5: Note that a transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SMBCLK’s

falling edge.

1 2 3 4 5 6 7 8 ... 15 16

Komentarze do niniejszej Instrukcji

Brak uwag

Rainbow-electronics MAX6690 Instrukcja Użytkownika Strona 3

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Czujniki Rainbow-electronics MAX6690