Temperature Sensor. LM70 Datasheet

LM70 Sensor. Datasheet pdf. Equivalent


National Semiconductor LM70
July 2000
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
j Supply Current
j Temperature
Accuracy
operating
shutdown
−40˚C to 85˚C
−10˚C to 65˚C
−55˚C to 125˚C
−55˚C to 150˚C
2.65V to 5.5V
260µA (typ)
490µA (max)
12µA (typ)
±2˚C(max)
+1.5/−2˚C(max)
+3/−2˚C(max)
+3.5/−2˚C(max)
Simplified Block Diagram
MICROWIRE® is a registered trademark of National Semiconductor Corporation.
© 2000 National Semiconductor Corporation DS101223
DS101223-1
www.national.com


LM70 Datasheet
Recommendation LM70 Datasheet
Part LM70
Description SPI/MICROWIRE 10-Bit plus Sign Digital Temperature Sensor
Feature LM70; LM70 SPI/MICROWIRE10-Bit plus Sign Digital Temperature Sensor July 2000 LM70 SPI/MICROWIRE™ 10-Bit.
Manufacture National Semiconductor
Datasheet
Download LM70 Datasheet




National Semiconductor LM70
Connection Diagrams
MSOP-8
DS101223-2
TOP VIEW
NS Package Number MUA08A
LLP-8
DS101223-25
TOP VIEW
NS Package Number LDA08A
Ordering Information
Order Number
LM70CILD-3
LM70CILDX-3
LM70CILD-5
LM70CILDX-5
LM70CIMM-3
LM70CIMMX-3
LM70CIMM-5
LM70CIMMX-5
Package
Marking
T33
T33
T35
T35
T04C
T04C
T03C
T03C
NS Package
Number
LLP-8, LDA08A
LLP-8, LDA08A
LLP-8, LDA08A
LLP-8, LDA08A
MSOP-8, MUA08A
MSOP-8, MUA08A
MSOP-8, MUA08A
MSOP-8, MUA08A
Supply Voltage
Transport Media
2.65V to 3.6V
2.65V to 3.6V
4.5V to 5.5V
4.5V to 5.5V
2.65V to 3.6V
2.65V to 3.6V
4.5V to 5.5V
4.5V to 5.5V
_ Units in Rail
_ Units in Rail
_ Units in Tape and Reel
_ Units in Tape and Reel
250 Units in Rail
3500 Units in Tape and Reel
250 Units in Rail
3500 Units in Tape and Reel
Pin Descriptions
Label
SI/O
SC
GND
V+
CS
NC
SOP-8
Pin #
1
2
4
5
LLP-8
Pin #
1
3
7
5
Function
Input/Output - Serial bus bi-directional data
line. Schmitt trigger input.
Clock - Serial bus clock Schmitt trigger input
line.
Power Supply Ground
Positive Supply Voltage Input
7
3, 6, 8
8
2, 4, 6
Chip Select input.
No Connect
Typical Connection
From and to Controller
From Controller
Ground
DC Voltage from 2.65V to 5.5V. Bypass
with a 0.1 µF ceramic capacitor.
From Controller
These pins are not connected to the
LM70 die in any way.
www.national.com
2



National Semiconductor LM70
Typical Application
FIGURE 1. COP Microcontroller Interface
DS101223-3
3 www.national.com







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)