3
Maxim Integrated
?癈 Accurate 8-Channel Temperature Sensor
MAX6581
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, T
A
= -40NC to +125NC,
unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25NC.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Sensitivity of
Temperature Accuracy
Q0.2
NC/V
Conversion Time per Channel
t
CONV
Resistance cancellation mode off
95
125
156
ms
Resistance cancellation mode on or beta
compensation on
190
250
312
Remote-Diode Source Current
I
RJ
High level
Resistance cancellation
mode off
80
100
120
FA
Low level
8
10
12
High level
Resistance cancellation
mode on or beta
compensation on
160
200
240
Low level
16
20
24
DXP_ and DXN_ Leakage Current
Standby mode
100
nA
Undervoltage Lockout Threshold
UVLO
Falling edge of V
CC
disables ADC
2.25
2.80
2.95
V
Undervoltage Lockout Hysteresis
90
mV
Power-On-Reset (POR)
Threshold
V
CC
falling edge
1.3
2.0
2.2
V
POR Threshold Hysteresis
90
mV
ALERT and OVERT
Output Low Voltage
V
OL
I
SINK
= 1mA
0.01
V
I
SINK
= 6mA
0.3
Input Leakage Current
I
LEAK
-1
+1
FA
SMBus INTERFACE, STBY
Logic Input Low Voltage
V
IL
V
CC
= 3.6V
0.8
V
Logic Input High Voltage
V
IH
V
CC
= 3.0V
2.2
V
Input Leakage Current
-1
+1
FA
Output Low Voltage
V
OL
I
SINK
= 6mA
0.1
V
Input Capacitance
C
IN
5
pF
SMBus-COMPATIBLE TIMING (Figures 3 and 4) (Note 3)
Serial-Clock Frequency
f
SMBCLK
(Note 4)
400
kHz
Bus Free Time Between STOP
and START Condition
t
BUF
f
SMBCLK
= 400kHz
1.6
Fs
START Condition Setup Time
f
SMBCLK
= 400kHz
0.6
Fs
Repeated START Condition
Setup Time
t
SU:STA
90% of SMBCLK to 90% of SMBDATA,
f
SMBCLK
= 400kHz
50
ns
START Condition Hold Time
t
HD:STA
10% of SMBDATA to 90% of SMBCLK,
f
SMBCLK
= 400kHz
0.6
Fs
STOP Condition Setup Time
t
SU:STO
90% of SMBCLK to 90% of SMBDATA,
f
SMBCLK
= 400kHz
0.6
Fs
Clock Low Period
t
LOW
10% to 10%, f
SMBCLK
= 400kHz
1
Fs
Clock High Period
t
HIGH
90% to 90%
0.6
Fs
Data-In Hold Time
t
HD:DAT
0
0.9
us
Data-In Setup Time
t
SU:DAT
(Note 5)
100
ns
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