FM75 Low Voltage 2-Wire Digital Temperature Sensor with Thermal Alarm
PRELIMINARY
July 2001
FM75
Low Voltage 2-Wire Digital Temperature
Sensor with Thermal Alarm
General Description
The FM75 is a high-precision CMOS temperature sensor with a
Delta-Sigma analog-to-digital converter and a SMBus compatible
serial digital interface. The FM75 is typically accurate to
鹵2擄C
over
the full temperature range of -40擄C to 125擄C and to
鹵1擄C
over the
range of 0擄C to 100擄C. The FM75 provides digital temperature
data with 9 to 12-bit resolution. The default resolution is 9 bits, but
for applications requiring higher resolution, the user can program
the FM75 to provide 10, 11, or 12 bit data.
The FM75 features a thermal alarm function with a user-program-
mable trip temperature and turn-off temperature. This alarm can
operate in two modes 鈥?interrupt mode and comparator mode 鈥?/div>
which allows flexibility for many types of applications.
The FM75 is available in SOP-8 and MSOP-8 surface mount
packages.
Features
I
User Configurable to 9, 10, 11 or 12-bit Resolution
I
Precision Calibrated to
鹵1擄C
from 0擄C to 100擄C Typical
I
Temperature Range: -40擄C to 125擄C
I
Low Operating Current (less than 250碌A(chǔ))
I
Low Self Heating (0.2擄C max in still air)
I
Operating Voltage Range: 2.7V to 5.5V
Applications
I
Battery Management
I
FAX Management
I
Printers
I
Portable Medical Instruments
I
HVAC
I
Power Supply Modules
I
Disk Drives
I
Computers
I
Automotive
Pin Configuration
Application Diagram
2.7 to 5.5V
SDA
SCL
O.S.
GND
1
8
V
DD
A0
User
Programmable
Address
8
2
7
A0
A1
A2
SMBus
Interface
7
6
5
FM75
3
6
A1
A2
FM75
8 Pin
Configuration
3
O.S.
4
5
SDA
SCL
1
2
4
漏 2001 Fairchild Semiconductor Corporation
FM75 Rev. A.4
1
www.fairchildsemi.com
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