DS75 Datasheet, PDF (12/13 Pages) Dallas Semiconductor – 2.Wire Thermal Watchdog

ELECTRICAL CHARACTERISTICS:
DIGITAL THERMOMETER
PARAMETER
SYMBOL CONDITION
Thermometer Error
T_ERR
-25 to +100
-55 to +125
Resolution
Conversion Time
t_CONVT
9-bit
conversions
10-bit
conversions
11-bit
conversions
12-bit
conversions
DS75
(-55°C to +125°C; 2.7V ≤ V_DD ≤ 5.5V)
MIN TYP MAX UNITS NOTES
± 2.0
°C
9
± 3.0
9
12
bits
125 150
ms
250 300
500 600
1000 1200
AC ELECTRICAL CHARACTERISTICS (-55°C to +125°C; 2.7V ≤ V_DD ≤ 5.5V)
PARAMETER
SYMBOL CONDITION MIN TYP MAX UNITS NOTES
SCL clock frequency
f_SCL
Fast Mode
Standard Mode
400 KHz
100
Bus free time between
t_BUF
Fast Mode
1.3
µs
a STOP and START condition
Standard Mode 4.7
Hold time (repeated)
START condition
t_HD:STA
Fast Mode
0.6
Standard Mode 4.0
µs
5
LOW period of SCL
t_LOW
Fast Mode
1.3
µs
Standard Mode 4.7
HIGH period of SCL
t_HIGH
Fast Mode
0.6
µs
Standard Mode 4.0
Set-up time for a
t_SU:STA
Fast Mode
0.6
µs
repeated START
Standard Mode 4.7
Data hold time
t_HD:DAT
Fast Mode
0
Standard Mode 0
0.9
µs
6
Data set-up time
t_SU:DAT
Fast Mode
100
Standard Mode 250
ns
7
Rise time of both SDA
and SCL signals
Fall time of both SDA
and SCL signals
Set-up time for a STOP
t_R
t_F
t_SU:STO
Fast Mode
Standard Mode
Fast Mode
Standard Mode
Fast Mode
Standard Mode
20 ₊
0.1C_B
20 ₊
0.1C_B
0.6
4.0
300
ns
8
1000
300
ns
8
µs
Capacitive load for
C_b
each bus line
400
pF
8
Input Capacitance
C_I
5
pF
12 of 13