MAX6627/MAX6628 Remote ±1°C Accurate Digital Temperature
Sensors with SPI-Compatible Serial Interface General Description The MAX6627/MAX6628 precise digital temperature
sensors report 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. The
devices can also measure the die temperature of other
ICs, such as microprocessors (µPs) or microcontrollers
(µCs) that contain an on-chip, diode-connected transistor.
Remote accuracy is ±1°C when the temperature of the remote
diode is between 0°C and +125°C and the temperature of the
devices is +30°C. The temperature is converted to a 12-bit +
sign word with 0.0625°C resolution. The architecture of the
device is capable of interpreting data as high as +145°C from
the remote sensor. The MAX6627/MAX6628 temperature
should never exceed +125°C.
These sensors are 3-wire serial interface SPI-compatible,
allowing the MAX6627/MAX6628 to be readily connected
to a variety of µCs. The MAX6627/MAX6628 are readonly devices, simplifying their use in systems where only
temperature data is required.
Two conversion rates are available, one that continuously
converts data every 0.5s (MAX6627), and one that converts
data every 8s (MAX6628). The slower version provides …
