MAX1618MUB+T

MAX1618MUB+T Datasheet

MAX1618 †

Part	Datasheet
MAX1618MUB+T	MAX1618MUB+T (pdf)

Related Parts	Information
MAX1618MUB+	MAX1618MUB+
MAX1618MUB	MAX1618MUB

PDF Datasheet Preview
MAX1618 † Remote Temperature Sensor with SMBus Serial Interface The MAX1618 precise digital thermometer reports the temperature of a remote sensor. The remote sensor is a diode-connected a low-cost, easily mounted 2N3904 NPN replaces conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The MAX1618 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 16Hz conversion rate or programmed to operate in a single-shot mode. The thermostat mode configures the ALERT output as an interrupt or as a temperature reset that remains active only while the temperature is above the maximum temperature limit or below the minimum temperature limit. The ALERT output polarity in thermostat mode can be configured for active high or active low. Fan control is implemented using this ALERT output. The MAX1618 is available in a small 1.1mm high 10-pin µMAX package. Desktop and Notebook Computers Central Office Telecom Equipment Smart Battery Packs Test and Measurement LAN Servers Multichip Modules Industrial Controls Configuration TOP VIEW ADD0 1 ADD1 2 GND 3 DXN 4 DXP 5 MAX1618 µMAX 10 ALERT 9 SMBDATA 8 SMBCLK 7 STBY 6 VCC o Single Channel Measures Remote CPU Temperature o No Calibration Required o SMBus 2-Wire Serial Interface o Programmable Under/Overtemperature Alarms o Overtemperature Output for Fan Control Thermostat Mode o Supports SMBus Alert Response Accuracy ±3°C +60°C to +100°C ±5°C -55°C to +120°C o 3µA typ Standby Supply Current o 900µA max Supply Current in Autoconvert Mode o +3V to +5.5V Supply Range o Small 10-Pin µMAX Package PART MAX1618MUB Ordering Information TEMP. RANGE -55°C to +125°C PIN-PACKAGE 10 µMAX 2N3904 Typical Operating Circuit 0.1µF 3V TO 5.5V VCC STBY MAX1618 SMBCLK SMBDATA DXN 2200pF ALERT ADD0 ADD1 GND 10k EACH CLOCK DATA INTERRUPT TO µC SMBus is a trademark of Intel Corp. †Patents Pending Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at Remote Temperature Sensor with SMBus Serial Interface MAX1618 ABSOLUTE MAXIMUM RATINGS VCC to GND to +6V DXP, ADD_ to GND to VCC + 0.3V DXN to GND to +0.8V SMBCLK, SMBDATA, ALERT, STBY to GND ...........-0.3V to +6V SMBDATA to 50mA DXN Current. ESD Protection all pins, Human Body Model .. 2000V Continuous Power Dissipation TA = +70°C µMAX derate 5.6mW/°C above +70°C ....................444mW Operating Temperature Range extended ......-55°C to +125°C Junction Temperature. Storage Temperature Range ............................-65°C to +150°C Lead Temperature soldering, 10s ................................+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, configuration byte register = X8h, TA = 0°C to +85°C, unless otherwise noted. PARAMETER ADC AND POWER SUPPLY CONDITIONS MIN TYP MAX UNITS Temperature Resolution Note 1 Temperature Error, Remote Diode Note 2 Supply-Voltage Range Undervoltage Lockout Threshold VCC UVLO Monotonicity guaranteed TR = +60°C to +100°C TR = +55°C to +125°C VCC input, disables A/D conversion, rising edge Bits Undervoltage Lockout Hysteresis Power-On Reset Threshold POR Threshold Hysteresis Standby Supply Current VCC, falling edge SMBus static Standby Supply Current Hardware or software standby, SMBCLK at 10kHz Average Operating Supply Current Autoconvert mode, average meAaustoucreodnvoevret r 4sec, 16 conv/sec mode, average Conversion Time Conversion Rate Timing Error tCONV From stop bit to conversion complete Autoconvert mode Remote-Diode Source Current DXP forced to DXN + 0.65V, ID = 1 high High level 80 Low level DXN Source Voltage ADDO, ADD1 Bias Current Momentary upon power-on reset SMBus INTERFACE

PDF Datasheet Preview

MAX1618 †

Remote Temperature Sensor with SMBus Serial Interface

The MAX1618 precise digital thermometer reports the temperature of a remote sensor. The remote sensor is a diode-connected a low-cost, easily mounted 2N3904 NPN replaces conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The MAX1618 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 16Hz conversion rate or programmed to operate in a single-shot mode.

The thermostat mode configures the ALERT output as an interrupt or as a temperature reset that remains active only while the temperature is above the maximum temperature limit or below the minimum temperature limit. The ALERT output polarity in thermostat mode can be configured for active high or active low. Fan control is implemented using this ALERT output.

The MAX1618 is available in a small 1.1mm high 10-pin µMAX package.

Desktop and Notebook Computers

Central Office Telecom Equipment

Smart Battery Packs

Test and Measurement

LAN Servers

Multichip Modules

Industrial Controls

Configuration

TOP VIEW

ADD0 1 ADD1 2 GND 3 DXN 4 DXP 5

MAX1618 µMAX
10 ALERT 9 SMBDATA 8 SMBCLK 7 STBY 6 VCC
o Single Channel Measures Remote CPU Temperature
o No Calibration Required o SMBus 2-Wire Serial Interface o Programmable Under/Overtemperature Alarms o Overtemperature Output for Fan Control

Thermostat Mode o Supports SMBus Alert Response Accuracy
±3°C +60°C to +100°C ±5°C -55°C to +120°C o 3µA typ Standby Supply Current o 900µA max Supply Current in Autoconvert Mode o +3V to +5.5V Supply Range o Small 10-Pin µMAX Package

PART MAX1618MUB
Ordering Information

TEMP. RANGE -55°C to +125°C

PIN-PACKAGE 10 µMAX
2N3904

Typical Operating Circuit
0.1µF
3V TO 5.5V

VCC STBY

MAX1618

SMBCLK

SMBDATA

DXN 2200pF

ALERT

ADD0 ADD1 GND
10k EACH

CLOCK DATA INTERRUPT TO µC

SMBus is a trademark of Intel Corp. †Patents Pending

Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at

Remote Temperature Sensor with SMBus Serial Interface

MAX1618

ABSOLUTE MAXIMUM RATINGS

VCC to GND to +6V DXP, ADD_ to GND to VCC + 0.3V DXN to GND to +0.8V SMBCLK, SMBDATA, ALERT, STBY to GND ...........-0.3V to +6V SMBDATA to 50mA DXN Current. ESD Protection all pins, Human Body Model .. 2000V

Continuous Power Dissipation TA = +70°C µMAX derate 5.6mW/°C above +70°C ....................444mW

Operating Temperature Range extended ......-55°C to +125°C Junction Temperature. Storage Temperature Range ............................-65°C to +150°C Lead Temperature soldering, 10s ................................+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, configuration byte register = X8h, TA = 0°C to +85°C, unless otherwise noted.

PARAMETER ADC AND POWER SUPPLY

CONDITIONS

MIN TYP MAX UNITS

Temperature Resolution Note 1

Temperature Error, Remote Diode Note 2

Supply-Voltage Range

Undervoltage Lockout Threshold

VCC UVLO

Monotonicity guaranteed

TR = +60°C to +100°C TR = +55°C to +125°C

VCC input, disables A/D conversion, rising edge

Bits

Undervoltage Lockout Hysteresis Power-On Reset Threshold POR Threshold Hysteresis Standby Supply Current

VCC, falling edge SMBus static

Standby Supply Current

Hardware or software standby, SMBCLK at 10kHz

Average Operating Supply Current

Autoconvert mode, average meAaustoucreodnvoevret r
4sec, 16 conv/sec
mode, average

Conversion Time Conversion Rate Timing Error
tCONV

From stop bit to conversion complete Autoconvert mode

Remote-Diode Source Current

DXP forced to DXN + 0.65V, ID = 1 high

High level 80

Low level

DXN Source Voltage

ADDO, ADD1 Bias Current

Momentary upon power-on reset

SMBus INTERFACE

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Datasheet ID: MAX1618MUB+T 647243