MAX1989
MAX1989 is Multichannel Remote/Local Temperature Sensors manufactured by Maxim Integrated.
- Part of the MAX1668 comparator family.
- Part of the MAX1668 comparator family.
Description
The MAX1668/MAX1805/MAX1989 are precise multichannel digital thermometers that report the temperature of all remote sensors and their own packages. The remote sensors are diode-connected transistors- typically low-cost, easily mounted 2N3904 NPN types- that replace conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The remote channels 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 mands to program the alarm thresholds and to read temperature data. The data format is 7 bits plus sign, with each bit corresponding to 1°C, in two’s-plement format.
The...
