LM75CIM-5 National Semiconductor, LM75CIM-5 Datasheet - Page 7

• Manufacturer Part Number: LM75CIM-5
• Description: Temperature Sensor IC
• Manufacturer: National Semiconductor

Specifications of LM75CIM-5

• Mounting Type: Surface Mount
• Supply Voltage Min: 3V
• Operating Temperature Max: 125°C
• Peak Reflow Compatible (260 C): No
• Ic Function: Temperature Sensor IC
• Supply Voltage Max: 5.5V
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Typical Performance Characteristics
1.0 Functional Description
The LM75 temperature sensor incorporates a band-gap type
temperature sensor and 9-bit ADC (Delta-Sigma Analog-to-
Digital Converter). The temperature data output of the LM75
is available at all times via the I
progress, it will be stopped and restarted after the read. A
digital comparator is also incorporated that compares a se-
ries of readings, the number of which is user-selectable, to
user-programmable setpoint and hysteresis values. The
comparator trips the O.S. output line, which is programmable
for mode and polarity.
The LM75B contains all the functionality of the LM75C, plus
two additional features:
1. The LM75B has an integrated low-pass filter on both the
SDA and the SCL line. These filters increase communi-
cations reliability in noisy environments.
Static Quiescent Current vs
Temperature
FIGURE 3. Printed Circuit Board Used for Thermal Resistance Specifications
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2
C bus. If a conversion is in
Dynamic Quiescent Current vs
Temperature
7
2. The LM75B also has a bus fault timeout feature. If the
1.1 O.S. OUTPUT, T
In Comparator mode the O.S. Output behaves like a ther-
mostat. The output becomes active when temperature ex-
ceeds the T
temperature drops below the T
O.S. output can be used to turn a cooling fan on, initiate an
emergency system shutdown, or reduce system clock
speed. Shutdown mode does not reset O.S. state in a com-
parator mode.
In Interrupt mode exceeding T
O.S. will remain active indefinitely until reset by reading any
register via the I
SDA line is held low for longer than t
minimum to 325 ms maximum) the LM75B will reset to
the IDLE state (SDA set to high impedance) and wait for
a new start condition.
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OS
limit, and leaves the active state when the
2
C interface. Once O.S. has been activated
OS
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AND T
Accuracy vs Temperature
OS
HYST
HYST
also makes O.S. active but
LIMITS
limit. In this mode the
TIMEOUT
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01265818
(75 ms