The ADT7461 is a dual-channel digital thermometer and under/over temperature alarm intended for use in PCs and thermal management systems. It is pin- and register-compatible with the ADM1032. The ADT7461 has three additional features: series resistance cancellation (where up to 3 kΩ(typical) of resistance in series with the temperature monitoring diode may be automatically cancelled from the temperature

FEATURES

•On-Chip and Remote Temperature Sensor

•0.25°C Resolution/1°C Accuracy on Remote Channel

•1°C Resolution/3°C Accuracy on Local Channel

•Automatically Cancels Up to 3 kΩ(Typ) of Resistance in Series with Remote Diode to Allow Noise Filtering

•Extended, Switchable Temperature Measurement Range 0°C to +127°C (Default) or –55°C to +150°C

•Pin−and Register−Compatible with the ADM1032

•2−Wire SMBus Serial Interface with SMBus Alert Support

•Two SMBus Address Versions Available:

♦ADT7461 SMBus Address is 0x4C

♦ADT7461-2 SMBus Address is 0x4D

•Programmable Over/Undertemperature Limits

•Offset Registers for System Calibration

•Up to Two Overtemperature Fail−Safe THERMOutputs

•Small 8−Lead SOIC or 8−Lead MSOP Packages

•170 A Operating Current, 5.5 A Standby Current

•These are Pb−Free Devices