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MAX1617A Dataheets PDF



Part Number MAX1617A
Manufacturers Maxim
Logo Maxim
Description Remote/Local Temperature Sensor
Datasheet MAX1617A DatasheetMAX1617A Datasheet (PDF)

19-4508; Rev 0; 1/99 UAL IT MAN TION K A ET U E L H A S EV TA WS DA FOLLO Remote/Local Temperature Sensor with SMBus Serial Interface ____________________________Features o Two Channels: Measures Both Remote and Local Temperatures o No Calibration Required o SMBus 2-Wire Serial Interface o Programmable Under/Overtemperature Alarms o Supports SMBus Alert Response o Supports Manufacturer and Device ID Codes o Accuracy ±2°C (+60°C to +100°C, local) ±3°C (-40°C to +125°C, local) ±3°C (+60°C to +10.

  MAX1617A   MAX1617A



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19-4508; Rev 0; 1/99 UAL IT MAN TION K A ET U E L H A S EV TA WS DA FOLLO Remote/Local Temperature Sensor with SMBus Serial Interface ____________________________Features o Two Channels: Measures Both Remote and Local Temperatures o No Calibration Required o SMBus 2-Wire Serial Interface o Programmable Under/Overtemperature Alarms o Supports SMBus Alert Response o Supports Manufacturer and Device ID Codes 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 70µA (max) Supply Current in Auto-Convert Mode o +3V to +5.5V Supply Range o Small 16-Pin QSOP Package ________________General Description The MAX1617A (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 two’s 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 MAX1617A is nearly identical to the popular MAX1617, but has improved SMBus timing specifications, improved bus collision immunity, software manufacturer and device identification available via the serial interface, and a poweron reset function that can force a reset of the slave address via the serial interface. MAX1617 A † Ordering Information PART* MAX1617AMEE TEMP. RANGE -55°C to +125°C PIN-PACKAGE 16 QSOP ________________________Applications Desktop and Notebook Computers Smart Battery Packs LAN Servers Industrial Controls Central Office Telecom Equipment Test and Measurement Multichip Modules *U.S. and foreign patents pending. Typical Operating Circuit 0.1µF 3V TO 5.5V 200Ω VCC STBY 10k EACH ___________________Pin Configuration TOP VIEW N.C. 1 VCC 2 DXP 3 DXN 4 N.C. 5 ADD1 6 GND 7 GND 8 16 N.C. 15 STBY 14 SMBCLK MAX1617A DXP SMBCLK SMBDATA 2N3904 DXN 2200pF ALERT CLOCK DATA INTERRUPT TO µC MAX1617A 13 N.C. 12 SMBDATA 11 ALERT 10 ADD0 9 N.C. ADD0 ADD1 GND QSOP SMBus is a registered trademark of Intel Corp. †Patents Pending 1 ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. Remote/Local Temperature Sensor with SMBus Serial Interface MAX1617A ABSOLUTE MAXIMUM RATINGS 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 Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VCC = +3.3V, TA = 0°C to +85°C, unless otherwise noted.) PARAMETER ADC AND POWER SUPPLY Temperature Resolution (Note 1) Initial Temperature Error, Local Diode (Note 2) Temperature Error, Remote Diode (Notes 2 and 3) Temperature Error, Local Diode (Notes 1 and 2) Supply-Voltage Range Undervoltage Lockout Threshold Undervoltage Lockout Hysteresis Power-On Reset Threshold POR Threshold Hysteresis Logic inpu.


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