MAX6581 Temperature Sensor Datasheet

MAX6581 Datasheet, PDF, Equivalent


Part Number

MAX6581

Description

8-Channel Temperature Sensor

Manufacture

Maxim Integrated

Total Page 27 Pages
Datasheet
Download MAX6581 Datasheet


MAX6581
EVALUATION KIT AVAILABLE
Click here for production status of specific part numbers.
MAX6581
±1°C Accurate 8-Channel Temperature Sensor
General Description
The MAX6581 precision multichannel temperature
sensor monitors its own temperature and the temperatures
of up to seven external diode-connected transistors. All
temperature channels have programmable alert and over-
temperature thresholds. When the measured temperature
of a channel crosses the respective threshold, a status bit
is set in one of the status registers. Two open-drain alarm
outputs (ALERT and OVERT) assert corresponding to
these bits in the status register(s).
Resistance cancellation is available for all channels and
compensates for high series resistance in circuit-board
traces and thermal diodes.
The 2-wire serial interface accepts SMBus protocols
(write byte, read byte, send byte, and receive byte) for
reading the temperature data and programming the alarm
thresholds.
The MAX6581 is specified for an operating temperature
range of -40°C to +125°C and is available in a 24-pin,
4mm x 4mm thin QFN package with an exposed pad.
Features
● Eight Channels to Measure Seven Remote and One
Local Temperature
● 11-Bit, 0.125°C Resolution
● High Accuracy of ±1°C (max) from +60°C to +100°C
(Remote Channels)
● -64°C to +150°C Remote Temperature Range
● Programmable Undertemperature/Overtemperature
Alerts
● SMBus/I2C-Compatible Interface
● Two Open-Drain Alarm Outputs (ALERT and OVERT)
● Resistance Cancellation on All Remote Channels
Applications
● Desktop Computers
● Notebook Computers
● Workstations
● Servers
● Data Communications
Ordering Information/Selector Guide
PART
SLAVE ADDRESS
PIN-PACKAGE
OPERATING
TEMPERATURE RANGE
MAX6581TG9A+
0X9A
24 TQFN-EP*
-40°C to +125°C
MAX6581TG9C+**
0X9C
24 TQFN-EP*
-40°C to +125°C
MAX6581TG9E+**
0X9E
24 TQFN-EP*
-40°C to +125°C
MAX6581TG98+**
0X98
24 TQFN-EP*
-40°C to +125°C
Note: All devices are specified over the -40°C to +125°C operating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
**Future product—contact factory for availability.
MEASURED
TEMPERATURE RANGE
-64°C to +150°C
-64°C to +150°C
-64°C to +150°C
-64°C to +150°C
Typical Application Circuit appears at end of data sheet.
19-5260; Rev 4; 2/19

MAX6581
MAX6581
±1°C Accurate 8-Channel Temperature Sensor
Absolute Maximum Ratings
(All voltages referenced to GND.)
VCC, SMBCLK, SMBDATA, ALERT,
OVERT, STBY to GND.........................................-0.3V to +4V
DXP_ to GND............................................ -0.3V to (VCC + 0.3V)
DXN_ to GND............................................ -0.3V to (VCC + 0.3V)
SMBDATA, ALERT, OVERT Current.................. -1mA to +50mA
DXN_ Current......................................................................±1mA
Continuous Power Dissipation (TA = +70°C)
TQFN (derate 27.8mW/°C above +70°C)..................2222mW
ESD Protection (All Pins, Human Body Model)...................±2kV
Operating Temperature Range.......................... -40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)........................................ +260°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.
Package Thermal Characteristics (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θJA) .......36.0°C/W
Junction-to-Case Thermal Resistance (θJC)...............3.0°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(VCC = +3.0V to +3.6V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.) (Note 2)
PARAMETER
Supply Voltage
Standby Supply Current
Operating Current
Temperature Resolution
3-Sigma Temperature Accuracy
(Remote Channels 1–7)
3-Sigma Temperature Accuracy
(Local)
6-Sigma Temperature Accuracy
(Remote Channels 1–7)
6-Sigma Temperature Accuracy
(Local)
SYMBOL
VCC
ISS
ICC1
ICC2
CONDITIONS
SMBus static
During conversion, RC off
During conversion, RC on
VCC = 3.3V
VCC = 3.3V
VCC = 3.3V
VCC = 3.3V
TA = +30°C to +85°C,
TRJ = +60°C to +100°C
TA, TRJ = -40°C to +125°C
TA = +30°C to +85°C,
TRJ = +100°C to +150°C
TA = +30°C to +85°C
TA = -40°C to +125°C
TA = 0°C to +150°C
TA = +30°C to +85°C,
TRJ = +60°C to +100°C
TA, TRJ = -40°C to +125°C
TA = +30°C to +85°C,
TRJ = +100°C to +125°C
TA = +30°C to +85°C
TA = -40°C to +125°C
TA = 0°C to +150°C
MIN
3.0
-0.85
-1.2
-2.5
-1
-2
-3
-1
-2
-2.75
-1.5
-2.5
-3.5
TYP
4
500
550
11
0.125
MAX
3.6
15
600
650
+0.85
+1.2
+2.5
+1
+2
+3
+1
+2
+2.75
+1.5
+2.5
+3.5
UNITS
V
µA
µA
Bits
°C
°C
°C
°C
°C
www.maximintegrated.com
Maxim Integrated 2


Features EVALUATION KIT AVAILABLE Click here for production status of specific part num bers. MAX6581 ±1°C Accurate 8-Chann el Temperature Sensor General Descript ion The MAX6581 precision multichannel temperature sensor monitors its own tem perature and the temperatures of up to seven external diode-connected transist ors. All temperature channels have prog rammable alert and overtemperature thre sholds. When the measured temperature o f a channel crosses the respective thre shold, a status bit is set in one of th e status registers. Two open-drain alar m outputs (ALERT and OVERT) assert corr esponding to these bits in the status r egister(s). Resistance cancellation is available for all channels and compensa tes for high series resistance in circu it-board traces and thermal diodes. The 2-wire serial interface accepts SMBus protocols (write byte, read byte, send byte, and receive byte) for reading the temperature data and programming the a larm thresholds. The MAX6581 is specified for an operating temper.
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