G766

The G766 is a precise digital thermometer that reports the temperature of a remote sensor. The remote sen-sor is a diode-connected transistor typically a low-cost, easily mounted 2N3904 NPN type-that replace con-ventional thermistors or thermocouples. Remote ac-curacy is ±3°C for multiple transistor manufacturers, with no calibration needed. The G766 can also meas-ure the die temperature of other ICs, such as micro-processors, that contain an on-chip, diode-connected transistor.

The 2-wire serial interface accepts standard System Management Bus (SMBus^TM) Write Byte, Read Byte, Send Byte, and Receive Byte commands to program
the alarm thresholds and to read temperature data. The data format is 7 bits plus sign, with each bit cor-responding to 1°C, in twos-complement format. Meas-urements can be done automatically and autono-mously, with the conversion rate programmed by the user or programmed to operate in a single-shot mode. The adjustable rate allows the user to control the sup-ply-current drain.

The G766 is available in a small, 10-pin MSOP sur-face-mount package.