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LM70 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM70
Description  SPI/MICROWIRE™ 10-Bit plus Sign Digital Temperature Sensor
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM70 Datasheet(HTML) 1 Page - National Semiconductor (TI)

 
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LM70
SPI/MICROWIRE10-Bit plus Sign Digital Temperature
Sensor
General Description
The
LM70
is
a
temperature
sensor,
Delta-Sigma
analog-to-digital converter with an SPI and MICROWIRE
compatible interface available in LLP and MSOP 8-pin pack-
ages. The host can query the LM70 at any time to read tem-
perature. A shutdown mode decreases power consumption
to less than 10 µA. This mode is useful in systems where low
average power consumption is critical.
The LM70 has 10-bit plus sign temperature resolution
(0.25˚C per LSB) while operating over a temperature range
of −55˚C to +150˚C.
The LM70’s 2.65V to 5.5V supply voltage range, low supply
current and simple SPI interface make it ideal for a wide
range of applications. These include thermal management
and protection applications in hard disk drives, printers, elec-
tronic test equipment, and office electronics.
Applications
n
System Thermal Management
n
Personal Computers
n
Disk Drives
n
Office Electronics
n
Electronic Test Equipment
Features
n
0.25˚C temperature resolution.
n
Shutdown mode conserves power between temperature
reading
n
SPI and MICROWIRE Bus interface
n
MSOP-8 and LLP-8 packages save space
Key Specifications
j Supply Voltage
2.65V to 5.5V
j Supply Current
operating
260µA (typ)
490µA (max)
shutdown
12µA (typ)
j Temperature
Accuracy
−40˚C to 85˚C
±2˚C(max)
−10˚C to 65˚C
+1.5/−2˚C(max)
−55˚C to 125˚C
+3/−2˚C(max)
−55˚C to 150˚C
+3.5/−2˚C(max)
Simplified Block Diagram
MICROWIRE® is a registered trademark of National Semiconductor Corporation.
DS101223-1
July 2000
© 2000 National Semiconductor Corporation
DS101223
www.national.com


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