Datasheet

3Maxim Integrated
±1°C 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