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`Prog...
ADT7483A: 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 ...
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Parameter | Rating |
Positive Supply Voltage (VDD) to GND D+ D− to GND SCLK, SDATA, ALERT, THERM Input Current, SDATA, THERM Input Current, D− ESD Rating, All Pins (Human Body Model) Maximum Junction Temperature (TJ MAX) Storage Temperature Range IR Reflow Peak Temperature IR Reflow Peak Temperature Pb-Free Lead Temperature (Soldering 10 sec) |
−0.3 V, +3.6 V −0.3 V to VDD + 0.3 V −0.3 V to +0.6 V −0.3 V to +3.6 V −1 mA, +50 mA ±1 mA 1,500 V 150°C −65°C to +150°C 220°C 260°C 300°C |
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, compatible with ADM1032, but can be switched to a wider measurement range, from −64°C to +191°C.
The ADT7483A communicates over a 2-wire serial interface compatible 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 of ADT7483A when the on-chip or remote temperature is outside the programmed limits. TheTHERM output is a comparator output that allows, for example, on/off control of a cooling fan. TheALERT output can be reconfigured as a secondTHERM output, if required.