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MAX1618 - Remote Temperature Sensor with SMBus Serial Interface

General Description

The MAX1618 precise digital thermometer reports the temperature of a remote sensor.

typically a low-cost, easily mounted 2N3904 NPN type

that replaces conventional thermistors or thermocouples.

Key Features

  • o Single Channel: Measures Remote CPU Temperature o No Calibration Required o SMBus 2-Wire Serial Interface o Programmable Under/Overtemperature Alarms o Overtemperature Output for Fan Control (Thermostat Mode) o Supports SMBus Alert Response Accuracy ±3°C (+60°C to +100°C) ±5°C (-55°C to +120°C) o 3µA (typ) Standby Supply Current o 900µA (max) Supply Current in Autoconvert Mode o +3V to +5.5V Supply Range o Small 10-Pin µMAX Package MAX1618 † Ordering Information PART MAX1618MUB TEMP. RANGE -.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-1495; Rev 1; 10/99 Remote Temperature Sensor with SMBus Serial Interface ________________General Description The MAX1618 precise digital thermometer reports the temperature of a remote sensor. The remote sensor is a diode-connected transistor—typically a low-cost, easily mounted 2N3904 NPN type—that replaces conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The MAX1618 can also measure the die temperature of other ICs, such as microprocessors, that contain an on-chip, diode-connected transistor. The 2-wire serial interface accepts standard System Management Bus (SMBus™) Write Byte, Read Byte, Send Byte, and Receive Byte commands to program the alarm thresholds and to read temperature data.