The MAX1617 (patents pending) is a precise digital thermometer that reports the temperature of both a remote sensor and its own package. The remote sensor is a diode-connected transistor-typically a low-cost, easily mounted 2N3904 NPN type-that replaces conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The remote channel 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 twos-complement format. Measurements can be done automatically and autonomously, 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 supply-current drain.
The MAX1617 is available in a small, 16-pin QSOP surface-mount package.
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Desktop and Notebook Computers Smart Battery Packs LAN Servers Industrial ControlsCentral Office Telecom EquipmentTest and MeasurementMulti-Chip Modules
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Two Channels: Measures Both Remote and Local TemperaturesNo Calibration RequiredSMBus 2-Wire Serial InterfaceProgrammable Under/Overtemperature AlarmsSupports SMBus Alert ResponseAccuracy: ±2°C (+60°C to +100°C, local) ±3°C (-40°C to +125°C, local) ±3°C (+60°C to +100°C, remote)3µA (typ) Standby Supply Current70µA (max) Supply Current in Auto-Convert Mode+3V to +5.5V Supply RangeSmall, 16-Pin QSOP Package
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VCC to GND........................................................-0.3V to +6V
DXP, ADD_ to GND................................-0.3V to (VCC + 0.3V)
DXN to GND ...................................................-0.3V to +0.8V
SMBCLK, SMBDATA, ALERT, STBY to GND ...........-0.3V to +6V
SMBDATA, ALERT Current .............................-1mA to +50mA
DXN Current ................................................................±1mA
ESD Protection (SMBCLK, SMBDATA,
ALERT, human body model) ..................................... 4000V
ESD Protection (other pins, human body model).........2000V
Continuous Power Dissipation (TA = +70°C)
QSOP (derate 8.30mW/°C above +70°C) ...............667mW
Operating Temperature Range ..................-55°C to +125°C
Junction Temperature................................................+150°C
Storage Temperature Range ......................-65°C to +165°C
Lead Temperature (soldering, 10sec) .......................+300°C
Post a Buying Lead
Required Field 
