Datasheet

© 2013 / www.atmel.com
2
World’s Most
Versatile
Temp erature
Sensing Solutions
Ideal For:
• Industrial: Industrial controls,
smart meters, HVAC, lighting
ballast, fire alarms, test equip-
ment, medical devices, and
LED lighting
• Consumer: Li-ion batteries,
set-top boxes, audio/video
equipment, game consoles,
white goods, thermostats,
and LED lighting
• Communications: Telecom
equipment, smartphones, gate-
ways, routers, headsets, call
servers, and power supplies
• Computers: Desktops, laptops,
netbooks, tablets, servers,
SSDs and HDDs
Why Do Applications Need a
Temperature Sensor?
As today’s electronic systems run faster and as silicon content increases, these
applications are generating more heat than ever, making the need to monitor
temperature increasingly important. A temperature sensor can effectively measure
the system and processor temperatures and allows the processor and system bus
frequencies to be throttled back when the temperature exceeds a preset limit.
This ensures product safety and reliability while minimizing the need for cooling
fans and heat sinks which may not be practical in today’s increasingly compact
designs. For systems that do include a fan to maintain proper conditions,
temperature sensors can be used to vary the fan speed as needed to reduce
noise, reduce power consumption, and prolong the life of the fan.
In portable applications that utilize Li-ion or Li-polymer batteries, temperatures
in excess of 60°C can cause the batteries to overheat and swell, catch on fire, or
even explode. A temperature sensor can actively monitor the battery temperature,
allowing the system to warn the user, to shut itself down, or to even shut down
the battery charging in the event of an over-temperature situation, thereby
increasing the safety and reliability of the application.
Digital Temperature Sensor Advantages and Benefits
Application Example:
Atmel Digital Temperature Sensors provide highly accurate measurement to
better control temperature and prolong the life of the LEDs.
Temp Sensor
ATtiny Micro
Occupancy
Sensor
Ambient
Light
Sensor
LED Driver
G3
G2
G1
G0
PWM
MCU
AT30TS750A
Temp Sensor
SCL
SDA
ALERT
Comparator
V+
V+
V+
+
-
NTC
Thermistor
Processor
ADC
Reference
ADC
Input
Digital
Input
Competing Solution
Would you rather have this?
Or this?
• No calibration required
• No separate ADC required
• Increased system reliability
• No need for ADC on MCU
• More features and flexibility
• Ability to control other circuits
• Reduction in design complexity
• Easier manufacturing flow
• Better manufacturing throughput
• Power saving
• Lower overall system cost
Shunt
Voltage
Reference
Shunt
Voltage
Reference