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LM76CHMX-5 Datasheet

  • LM76CHMX-5

  • 【0.5∑C, 【1∑C, 12-Bit Sign Digital Temperature Sensor an...

  • 315.34KB

  • 15頁(yè)

  • NSC

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LM76
鹵
0.5藲C,
鹵
1藲C, 12-Bit + Sign Digital Temperature Sensor and Thermal Window Comparator
with Two-Wire Interface
January 2000
LM76
鹵
0.5藲C,
鹵
1藲C, 12-Bit + Sign Digital Temperature Sensor
and Thermal Window Comparator with Two-Wire
Interface
General Description
The LM76 is a digital temperature sensor and thermal win-
dow comparator with an I
2
C
鈩?/div>
Serial Bus interface with an
accuracy of
鹵
1藲C. This accuracy for the LM76CHM is speci-
fied for a 鈭?0藲C to 45藲C temperature range, while for the
LM76CNM the temperature range is 70藲C to 100藲C. The
LM76CHM is specified with an accuracy
鹵
0.5藲C at 25藲C. The
window-comparator architecture of the LM76 eases the de-
sign of temperature control systems conforming to the ACPI
(Advanced Configuration and Power Interface) specification
for personal computers. The open-drain Interrupt (INT) out-
put becomes active whenever temperature goes outside a
programmable window, while a separate Critical Tempera-
ture Alarm (T_CRIT_A) output becomes active when the
temperature exceeds a programmable critical limit. The INT
output can operate in either a comparator or event mode,
while the T_CRIT_A output operates in comparator mode
only.
The host can program both the upper and lower limits of the
window as well as the critical temperature limit. Program-
mable hysterisis as well as a fault queue are available to
minimize false tripping. Two pins (A0, A1) are available for
address selection. The sensor powers up with default thresh-
olds of 2藲C T
HYST
, 10藲C T
LOW
, 64藲C T
HIGH
, and 80藲C
T_CRIT.
The LM76鈥檚 3.3V and 5.0V supply voltage, Serial Bus inter-
face, 12-bit + sign output, and full-scale range of over 127藲C
make it ideal for a wide range of applications. These include
thermal management and protection applications in personal
computers, electronic test equipment, office electronics and
bio-medical applications.
Features
n
Window comparison simplifies design of ACPI
compatible temperature monitoring and control.
n
Serial Bus interface
n
Separate open-drain outputs for Interrupt and Critical
Temperature shutdown
n
Shutdown mode to minimize power consumption
n
Up to 4 LM76s can be connected to a single bus
n
12-bit + sign output; full-scale reading of over 127藲C
Key Specifications
n
Supply Voltage
n
Supply Current
operating
shutdown
n
Temperature
Accuracy
n
Resolution
+25藲C
鈭?0藲C to +45藲C
70藲C to 100藲C
3.3V or 5.0V
250 碌A(chǔ) (typ)
450 碌A(chǔ) (max)
8 碌A(chǔ) (max)
鹵
0.5藲C(max)
鹵
1.0藲C(max)
鹵
1.0藲C(max)
0.0625藲C
Applications
n
n
n
n
System Thermal Management
Personal Computers
Office Electronics
HVAC
I2C
廬
is a registered trademark of Philips Corporation.
漏 2000 National Semiconductor Corporation
DS101015
www.national.com

LM76CHMX-5 產(chǎn)品屬性

  • National Semiconductor (TI)

  • Digital

  • +/- 1.5 C

  • Serial (2-Wire)

  • + 150 C

  • - 55 C

  • Reel

  • Temperature Sensor

  • 12 bit+ Sign

  • 3 V to 5.5 V

  • 2500

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