Datasheet

MAX31725/MAX31726
±0.5°C Local Temperature Sensors
4Maxim Integrated
Figure 1. I
2
C Timing Diagram
Note 3: Limits are 100% production tested at T
A
= +25NC and/or T
A
= +85NC. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.
Note 4: All voltages are referenced to ground. Currents entering the IC are specified positive.
Note 5: These limits represent a 3-sigma distribution.
Note 6: All timing specifications are guaranteed by design.
Note 7: Holding the SDA line low for a time greater than t
TIMEOUT
causes the devices to reset SDA to the idle state of the serial
bus communication (SDA released).
Note 8: A master device must provide a hold time of at least 300ns for the SDA signal to bridge the undefined region of SCL’s fall-
ing edge.
Note 9: C
B
= total capacitance of one bus line in pF. Tested with C
B
= 400pF.
Note 10: Input filters on SDA and SCL suppress noise spikes less than 50ns.
I
2
C AC ELECTRICAL CHARACTERISTICS (continued)
(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
Pulse Width of Suppressed Spike t
SP
(Note 10) 0 50 ns
SDA Time Low for Reset of Serial
Interface
t
TIMEOUT
(Note 7) 45 50 55 ms
SCL
NOTE: TIMING IS REFERENCED TO V
IL(MAX)
AND V
IH(MIN)
.
SDA
STOP START REPEATED
START
t
BUF
t
HD:STA
t
HD:DAT
t
SU:DAT
t
SU:STO
t
HD:STA
t
SP
t
SU:STA
t
HIGH
t
R
t
F
t
LOW