Datasheet MAX6627 (Maxim)

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MAX6627/MAX6628 Remote
±
1°C Accurate Digital Temperature Sensors with SPI-Compatible Serial Interface General Description Benefits and Features
The MAX6627/MAX6628 precise digital temperature ● Accuracy sensors report the temperature of a remote sensor. The • ±1°C (max) from 0°C ≤ TRJ ≤ +125°C, TA = +30°C remote sensor is a diode-connected transistor, typically • ±2.4°C (max) from -55°C ≤ TRJ ≤ +100°C, a low-cost, easily mounted 2N3904 NPN type that 0°C ≤ TA ≤ +70°C replaces conventional thermistors or thermocouples. The ● 12-Bit + Sign, 0.0625°C Resolution devices can also measure the die temperature of other ● Low Power Consumption ICs, such as microprocessors (µPs) or microcontrollers • 30μA (typ) (MAX6628) (µCs) that contain an on-chip, diode-connected transistor. • 200μA (typ) (MAX6627) Remote accuracy is ±1°C when the temperature of the remote ● Operating Temperature Range (-55°C to +125°C) diode is between 0°C and +125°C and the temperature of the ● Measurement Temperature Range, Remote Junction devices is +30°C. The temperature is converted to a 12-bit + (-55°C to +145°C) sign word with 0.0625°C resolution. The architecture of the ● 0.5s (MAX6627) or 8s (MAX6628) Conversion Rate device is capable of interpreting data as high as +145°C from ● SPI-Compatible Interface the remote sensor. The MAX6627/MAX6628 temperature ● +3.0V to +5.5V Supply Range should never exceed +125°C. ● 8-Pin SOT23 and TDFN Packages These sensors are 3-wire serial interface SPI-compatible, ● Lead(Pb)-Free Version Available (TDFN Package) allowing the MAX6627/MAX6628 to be readily connected to a variety of µCs. The MAX6627/MAX6628 are read- only devices, simplifying their use in systems where only
Ordering Information appears at end of data sheet.
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 minimal power consumption under all operating conditions
Typical Operating Circuit
(30µA, typ). Either device can be read at any time and provide the data from the last conversion. + 3V TO + 5.5V 0.1µF Both devices operate with supply voltages between +3.0V and +5.5V, are specified between -55°C and +125°C, and come in space-saving 8-pin SOT23 and VCC GND lead-free TDFN packages. MAX6627 MAX6628
Applications
SDO ● Hard Disk Drive DXP ● Smart Battery Packs µC ● Industrial Control Systems 2200pF CS ● Notebooks, PCs DXN SCK 19-2032; Rev 7; 3/16