ADT7461A
1C Temperature Monitor
with Series Resistance
Cancellation
The ADT7461A is a dual-channel digital thermometer and
undertemperature/overtemperature alarm, intended for use in PCs and
ADT7461A
CONVERSION RATE
ON-CHIP ADDRESS POINTER
REGISTER
TEMPERATURE REGISTER
SENSOR
LOCAL TEMPERATURE LOCAL TEMPERATURE
VALUE REGISTER LOW-LIMIT REGISTER
LOCAL TEMPERATURE
2
D+
HIGH-LIMIT REGISTER
A-TO-D
ANALOG
LIMIT
CONVERTER
MUX REMOTE TEMPERATURE
COMPARATOR
3
D
LOW-LIMIT REGISTER
BUSY RUN/STANDBY
REMOTE TEMPERATURE
REMOTE TEMPERATURE
HIGH-LIMIT REGISTER
VALUE REGISTER
LOCAL THERM LIMIT
REGISTER
REMOTE OFFSET
EXTERNAL THERM LIMIT
REGISTER
REGISTER
CONFIGURATION
REGISTER
ALERT/
EXTERNAL DIODE OPEN-CIRCUIT
INTERRUPT 6
STATUS REGISTER THERM2
MASKING
4
THERM
ADT7461A SMBUS INTERFACE
1 5 7 8
V GND SDATA SCLK
DD
Figure 1. Functional Block Diagram
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter Rating Unit
Positive Supply Voltage (V ) to GND 0.3, +3.6 V
DD
D+ 0.3 to V + 0.3 V
DD
D to GND 0.3 to +0.6 V
SCLK, SDATA, ALERT, THERM 0.3 to +3.6 V
Input Current, SDATA, THERM 1, +50 mA
Input Current, D 1 mA
ESD Rating, All Pins (Human Body Model) 1500 V
Maximum Junction Temperature (T Max) 150 C
J
Storage Temperature Range 65 to +150 C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
NOTE: This device is ESD sensitive. Use standard ESD precautions when handling.
Table 2. THERMAL CHARACTERISTICS
Package Type Unit
JA JC
8-Lead MSOP 142 43.74 C/W