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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6634 Datasheet

(MAX6633 - MAX6635) 12-Bit Plus Sign Temperature Sensors

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MAX6633/MAX6634/
MAX6635
EVALUATION KIT AVAILABLE
12-Bit Plus Sign Temperature Sensors
with SMBus/I2C-Compatible Serial Interface
General Description
The MAX6633/MAX6634/MAX6635 combine a tempera-
ture sensor, a programmable overtemperature alarm,
and an SMBus/I2C-compatible serial interface into
a single package. They convert their die temperatures
into digital values using internal analog-to-digital con-
verters (ADCs). The result of the conversion is then held
in a temperature register as a 12-bit + sign value, allow-
ing 0.0625°C resolution, readable at any time through
the serial interface. The devices are capable of reading
temperatures up to +150°C.
The MAX6633/MAX6634/MAX6635 feature a shutdown
mode that saves power by turning off everything except
the power-on reset (POR) and the serial interface.
The devices can be configured to separate addresses,
allowing multiple devices to be used on the same bus.
The MAX6633 has four address pins, allowing up to 16
devices to be connected to a single bus. The MAX6634
has three address pins, allowing up to eight devices to
be connected to a single bus. The MAX6635 has two
address pins, allowing up to four devices to be con-
nected to a single bus.
The MAX6633/MAX6634/MAX6635 make temperature
data available for transfer over the serial interface.
The MAX6634 incorporates a dual-mode ALERT output
(open drain) and can serve as an upgraded alternative
to the LM75. The MAX6635 includes an ALERT output
and an OVERT output (both open drain) and can func-
tion as an upgraded replacement for the LM76 in most
applications. The MAX6634/MAX6635 feature user-pro-
grammable temperature thresholds. All three devices
come in an 8-pin SO package.
Applications
● Battery Temperature Alarms
● PC Temperature Control
Pin Configurations appear at end of data sheet.
Features
● +3V to +5.5V Supply Range
● Accuracy
±1°C max (0°C to +50°C)
±1.5°C max (-20°C to +85°C)
±2.5°C max (-40°C to +125°C)
±2.5°C typ (+150°C)
● User-Programmable Temperature Thresholds
(MAX6634/MAX6635)
● User-Configurable Alarm Output(s) (MAX6634/
MAX6635)
● Ability to Respond to SMBus/I2C-Compatible Alert
Response Address (MAX6634/MAX6635)
● OVERT Output for System Shutdown (MAX6635)
● Multiple Devices per Bus
16 devices (MAX6633)
8 devices (MAX6634)
4 devices (MAX6635)
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX6633MSA -55°C to +150°C 8 SO
MAX6634MSA -55°C to +150°C 8 SO
MAX6635MSA -55°C to +150°C 8 SO
Typical Operating Circuit
VCC
0.1µF +3.0V TO +5.5V
8
VCC
10k1k1k10k
ALERT 5
MAX6635 SDA 1
SCL 2
OVERT 3
A0 A1 GND
76 4
TO INTERRUPT
CONTROLLER
TO SMBus/I2C
MASTER
TO SYSTEM
SHUTDOWN
19-2120; Rev 1; 4/14


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6634 Datasheet

(MAX6633 - MAX6635) 12-Bit Plus Sign Temperature Sensors

No Preview Available !

MAX6633/MAX6634/
MAX6635
12-Bit Plus Sign Temperature Sensors
with SMBus/I2C-Compatible Serial Interface
Absolute Maximum Ratings
VCC, SDA, SCL.....................................................-0.3V to +6.0V
All Other Pins ...............................................-0.3V to VCC +0.3V
SDA, ALERT, OVERT Current............................ -1mA to +50mA
ESD Protection (Human Body Model)...............................2000V
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
Junction Temperature.......................................................+150°C
Operating Temperature Range.......................... -55°C to +150°C
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 = +3.0V to +5.5V, TA = -55°C to +125°C, unless otherwise noted. Typical values are VCC = +3.3V, TA = +25°C, unless other-
wise noted.)
PARAMETER
SYMBOL
CONDITIONS
TEMPERATURE-TO-DIGITAL CONVERTER CHARACTERISTICS
Supply Range
Accuracy (Note 1)
Power-Supply Rejection Ratio
VCC
PSRR
0°C ≤ TA = ≤ +50°C, VCC = +3.3V
-20°C ≤ TA = ≤ +85°C, VCC = +3.3V
-40°C ≤TA = ≤ 125°C, VCC = +3.3V
TA = -55°C, VCC = +3.3V
TA = +150°C, VCC = +3.3V
POR Threshold Hysteresis
Supply Current in Shutdown
Average Operating Current
Peak Operating Current (Note 2)
Conversion Rate
VCC = +3.0V­, SMBus inactive
VCC = +5.5V, SMBus inactive
VCC = +3.0V, SMBus inactive
VCC = +5.5V, SMBus inactive
VCC = +3.0V, SMBus inactive
VCC = +5.5V, SMBus inactive
DIGITAL INTERFACE
Logic Input Low Voltage
Logic Input High
Voltage
Input Leakage Current
Output Low Sink Current
VIL
VIH
II_LEAK
IOL
VCC = +3.0V to +5.5V
VCC = +3V
VCC = +5.5V
VIN = GND or VCC
VOL = 0.6V (SMBDATA,
ALERT, OVERT)
Output Leakage Current
Input Capacitance
IO_LEAK
CIN
ALERT, OVERT at VCC
MIN TYP MAX UNITS
3.0 5.5 V
-1.0 ±0.4 +1.0
-1.5 ±0.6 +1.5
-2.5 ±1.0 +2.5
°C
-2.8 ±1.5 +2.8
±2.5
0.2 0.5 °C/V
90 mV
12 20
µA
20 30
150
µA
200
270 350
350 700
µA
1.4 2 2.4 Hz
0.65
V
2.2
V
2.4
±1 µA
6 mA
±1 µA
5 pF
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX6634
Description (MAX6633 - MAX6635) 12-Bit Plus Sign Temperature Sensors
Maker Maxim Integrated Products
Total Page 16 Pages
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