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MAX1805

Maxim
Part Number MAX1805
Manufacturer Maxim
Description Multichannel Remote / Local Temperature Sensor
Published Apr 10, 2015
Detailed Description MAX1668/MAX1805† 19-1766; Rev 0; 8/00 Multichannel Remote/Local Temperature Sensor ________________General Descriptio...
Datasheet PDF File MAX1805 PDF File

MAX1805
MAX1805


Overview
MAX1668/MAX1805† 19-1766; Rev 0; 8/00 Multichannel Remote/Local Temperature Sensor ________________General Description The MAX1668/MAX1805 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 lowcost, 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 commands 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-complement format.
The MAX1668/MAX1805 are available in small, 16-pin QSOP surface-mount packages.
________________________Applications Desktop and Notebook Computers Central Office Telecom Equipment LAN Servers Test and Measurement Industrial Controls Multichip Modules ____________________________Features o Multichannel 4 Remote, 1 Local (MAX1668) 2 Remote, 1 Local (MAX1805) o No Calibration Required o SMBus 2-Wire Serial Interface o Programmable Under/Overtemperature Alarms o Supports SMBus Alert Response o Accuracy ±2°C (+60°C to +100°C, local) ±3°C (-40°C to +125°C, local) ±3°C (+60°C to +100°C, remote) o 3µA (typ) Standby Supply Current o 700µA (max) Supply Current o Small, 16-Pin QSOP Package _______________Ordering Information PART MAX1668MEE MAX1805MEE TEMP.
RANGE -55°C to +125°C -55°C to +125°C PIN-PACKAGE 16 QSOP 16 QSOP Pin Configurations Typical Operating Circuit TOP VIEW DXP1 1 DXN1 2 DXP2 3 DXN2 4 (N.
C.
) DXP3 5 (N.
C.
) DXN3 6 (N.
C.
) DXP4 7 (N.
C.
) DXN4 8 ( ) ARE FOR MAX1805.
MAX1668 MAX1805 QSOP 16 GND 15 STBY 14 SM...


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