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MAX7500-MAX7502 Datasheet(PDF) 4 Page - Maxim Integrated Products

Part No. MAX7500-MAX7502
Description  Digital Temperature Sensors and Thermal Watchdog with Bus Lockup Protection
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX7500-MAX7502 Datasheet(HTML) 4 Page - Maxim Integrated Products

 
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Digital Temperature Sensors and Thermal
Watchdog with Bus Lockup Protection
4
_______________________________________________________________________________________
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
TEMPERATURE (
°C)
95
65
35
5
-25
240
250
260
270
280
290
300
230
-55
125
+VS = +5V
+VS = +3V
1
2
3
4
5
6
0
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
TEMPERATURE (
°C)
95
65
35
5
-25
-55
125
+VS = +5V
+VS = +3V
ACCURACY vs. TEMPERATURE
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
2.0
-2.0
TEMPERATURE (
°C)
95
65
35
5
-25
-55
125
4 TYPICAL PARTS
Pin Description
PIN
MAX7500
MAX7501
MAX7502
NAME
FUNCTION
1
1
SDA
Serial Data Input/Output Line. Open drain. Connect SDA to a pullup resistor.
2
2
SCL
Serial Data Clock Input. Open drain. Connect SCL to a pullup resistor.
3
3
OS
Over-Temperature Shutdown Output. Open drain. Connect OS to a pullup resistor.
4
4
GND
Ground
5
A2
2-Wire Interface Address Input. Connect A2 to GND or +VS to set the desired I
2C bus
address. Do not leave floating. (See Table 1.)
5
RESET
Active-Low Reset Input. Pull RESET low for longer than the minimum reset pulse width
to reset the I
2C bus and all internal registers to their POR values.
66
A1
2-Wire Interface Address Input. Connect A1 to GND or +VS to set the desired I
2C bus
address. Do not leave floating. (See Table 1.)
77
A0
2-Wire Interface Address Input. Connect A0 to GND or +VS to set the desired I
2C bus
address. Do not leave floating. (See Table 1.)
88
+VS
Positive Supply Voltage Input. Bypass to GND with a 0.1µF bypass capacitor.
Detailed Description
The MAX7500/MAX7501/MAX7502 temperature sen-
sors measure temperature, convert the data into digital
form using a sigma-delta ADC, and communicate the
conversion results through an I2C-compatible 2-wire
serial interface. These devices accept standard I2C
commands to read the data, set the over-temperature
alarm (OS) trip thresholds, and configure other charac-
teristics. The MAX7500 features three address select
lines (A0, A1, A2) while the MAX7501 and MAX7502
feature two address select lines (A0, A1) and a RESET
input. The MAX7500/MAX7501/MAX7502 operate from
+3.0V to +5.5V supply voltages of and consume 250µA
of supply current.


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