ADT7483A Datasheet | Analog Devices

FEATURES 1 local and 2 remote temperature sensors 0.25°C resolution/1°C accuracy on remote channels 1°C resolution/1°C accuracy on local channel Extended, switchable temperature measurement range 0°C to 127°C (default) or - 64°C to +191°C 2-wire SMBus serial interface with SMBus alert support Programmable over/under temperature limits Offset registers for system calibration Up to 2 overtemperature fail-safe THERM outputs Small 16-lead QSOP package 240 μA operating current, 5 μA standby current GENERAL DESCRIPTION The ADT7483A1 is a three-channel digital thermometer and under/over temperature alarm, intended for use in PCs and thermal management systems. It can measure the temperature in two remote locations, for example, the remote thermal diode in a CPU or GPU, or a discrete diode connected transistor. It can also measure its own ambient temperature. The temperature of the remote thermal diode and ambient temperature can be accurately measured to ±1°C. The temperature measurement range defaults to 0°C to 127°C, patible with ADM1032, but can be switched to a wider measurement range, from - 64°C to +191°C. The ADT7483A municates over a 2-wire serial interface patible with system management bus (SMBus) standards. The SMBus address is set by the ADD0 and ADD1 pins. As many as nine different SMBus addresses are possible. An ALERT output signals when the on-chip or remote temperature is outside the programmed limits. The THERM output is a parator output that allows, for example, on/off control of a cooling fan. The ALERT output can be reconfigured as a second THERM output, if required. APPLICATIONS Desktop and notebook puters Industrial controllers Smart batteries Automotive Embedded systems Burn-in applications Instrumentation FUNCTIONAL BLOCK DIAGRAM ADDRESS POINTER REGISTER ONE-SHOT REGISTER ON-CHIP TEMP SENSOR CONVERSION RATE REGISTER LIMIT PARATOR LOCAL TEMPERATURE THERM LIMIT REGISTER LOCAL TEMPERATURE LOW LIMIT REGISTER LOCAL TEMPERATURE HIGH LIMIT REGISTER...