The LM83 is a digital temperature sensor with a 2 wire serial interface that senses the voltage and thus the temperature of three remote diodes using a Delta-Sigma analog-to-digital converter with a digital over-temperature detector. The LM83 accurately senses its own temperature as well as the temperature of three external devices, such as Pentium II® Processors or diode connected 2N3904s. The temperature of any ASIC can be detected using the LM83 as long as a dedicated diode (semiconductor junction) is available on the die. Using the SMBus interface a host can access the LM83's registers at any time. Activation of a T_CRIT_A# output occurs when any temperature is greater than a programmable comparator limit, T_CRIT. Activation of an INT# output occurs when any temperature is greater than its corresponding programmable comparator HIGH limit.
The host can program as well as read back the state of the T_CRIT register and the four T_HIGH registers. Three state logic inputs allow two pins (ADD0, ADD1) to select up to 9 SMBus address locations for the LM83. The sensor powers up with default thresholds of 127°C for T_CRIT and all T_HIGHs. The LM83 is pin for pin and register compatible with the LM84 as well as the Maxim MAX1617 and the Analog Devices ADM1021.
|[Solid_Square] Supply Voltage||3.0V to 3.6V|
|[Solid_Square] Supply Current||0.8mA (max)|
|[Solid_Square] Local Temp Accuracy (includes quantization error)|
|0°C to +85°C||±3.0°C (max)|
|[Solid_Square] Remote Diode Temp Accuracy (includes quantization error)|
|+25°C to +100°C||±3°C (max)|
|0°C to +125°C||±4°C (max)|
|Part number||Order||Device type||Interface||Local sensor accuracy (Max) (+/- C)||Temp resolution (Max) (bits)||Operating temperature range (C)||Supply voltage (Min) (V)||Supply voltage (Max) (V)||Supply current (Max) (uA)||Features||Remote channels (#)||Addresses||Rating||Package Group||Package size: mm2:W x L (PKG)||Approx. price (US$)|
||Remote||I2C, SMBus, 2-Wire||3||8||-40 to 125||3||3.6||800||ALERT||3||9||Catalog||SSOP | 16||16SSOP: 29 mm2: 6 x 4.9 (SSOP | 16)||2.06 | 1ku|
||Remote||I2C, SMBus, 2-Wire||2||11||-40 to 140||3||3.6||800||
|4||3||Catalog||WSON | 14||14WSON: 16 mm2: 4 x 4 (WSON | 14)||0.88 | 1ku|
||Remote||I2C, SMBus, 2-Wire||2||11||-40 to 140||2.7||5.5||800||
|4||3||Catalog||WSON | 14||14WSON: 16 mm2: 4 x 4 (WSON | 14)||0.91 | 1ku|