Datasheet

MAX31725/MAX31726
±0.5°C Local Temperature Sensors
3Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 2.5V to 3.7V, T
A
= -55
N
C to +150
N
C, unless otherwise noted. Typical values are V
DD
= 3.3V, T
A
= +25NC.) (Note 3)
I
2
C AC ELECTRICAL CHARACTERISTICS
(V
DD
= 2.5V to 3.7V, T
A
= -55
N
C to +150NC, unless otherwise noted. Typical values are V
DD
= 3.3V, T
A
= +25
N
C.) (Notes 3, 6) (Figure 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OS Delay Depends on fault queue setting 1 6 Conversions
T
OS
Default Temperature Factory default setting 80 80 80 NC
T
HYST
Default Temperature Factory default setting 75 75 75 NC
POR Voltage Threshold 2.26 V
POR Hysteresis 130 mV
Input-High Leakage Current I
IH
V
IN
= 3.3V (all digital inputs) 0.005 1 FA
Input-Low Leakage Current I
IL
V
IN
= 0V (all digital inputs ) 0.005 1 FA
Input Capacitance All digital inputs 5 pF
Output-High Leakage Current V
IN
= 3.3V (SDA and OS) 1 FA
OS Output Saturation Voltage I
OUT
= 4.0mA 0.8 V
Output Low Voltage I
OL
= 3mA (SDA) 0.4 V
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Serial Clock Frequency f
SCL
(Note 7) DC 400 kHz
Minimum RESET Pulse Width
t
RESET
MAX31726 only 100 ns
Bus Free Time Between STOP
and START Conditions
t
BUF
1.3
Fs
START Condition Hold Time t
HD:STA
0.6
Fs
STOP Condition Setup Time t
SU:STO
90% of SCL to 10% of SDA 600 ns
Clock Low Period t
LOW
1.3
Fs
Clock High Period t
HIGH
0.6
Fs
START Condition Setup Time t
SU:STA
90% of SCL to 90% of SDA 100 ns
Data Setup Time t
SU:DAT
10% of SDA to 10% of SCL 100 ns
Data Out Hold Time t
DH
(Note 8) 100 ns
Data In Hold Time t
HD:DAT
10% of SCL to 10% of SDA (Note 8) 0 0.9
Fs
Maximum Receive SCL/SDA Rise
Time
t
R
(Note 9) 300 ns
Minimum Receive SCL/SDA Rise
Time
t
R
(Note 9)
20 +
0.1C
B
ns
Maximum Receive SCL/SDA Fall
Time
t
F
(Note 9) 300 ns
Minimum Receive SCL/SDA Fall
Time
t
F
(Note 9)
20 +
0.1C
B
ns
Transmit SDA Fall Time t
F
(Note 9)
20 +
0.1C
B
250 ns