TC625 Datasheet, PDF (1/2 Pages) TelCom Semiconductor, Inc – 1-WIRE DIGITAL THERMOMETER

1- WIRE DIGITAL THERMOMETER
EVALUATION
KIT
AVAILABLE
1-WIRE DIGITAL THERMOMETER
PRELIMINARY INFORMATION
TTCC66225
FEATURES
s Single Wire Interface to Host Microcontroller
s High Precision ................. ±1°C Accuracy (Typical)
s Wide Measurement Range .......... – 25°C to +100°C
s No External Components Required
s Complimentary (TC625C) or Open Drain Outputs
(TC625N)
s Low Voltage Operation ........................ 2.7V to 5.5V
s Small Packages ......................... TO-92, SOT-23A-5
APPLICATIONS
s Isolated Temperature Sensing
s Environmental Control Systems
s Process / Industrial Control Systems
s Power System Temperature Monitoring
s Process Control Systems
FUNCTIONAL BLOCK DIAGRAM
TEMPERATURE
V_DD
TO VOLTAGE
CONVERTER
TC625
DELTA SIGMA
MODULATOR
D_OUT
GENERAL DESCRIPTION
The TC625 is a monolithic temperature sensor that
generates a pulse train, the high and low times of which vary
in direct proportion to the temperature of the device. This
technique allows temperature to be accurately measured by
the host microcontroller without an A/D converter, and with
only a single I/O port pin. The overall accuracy is ±1.5°C
typical over the rated measurement range of – 25°C to
+100°C.
Unlike voltage output temperature sensors, the digital
output of the TC625 offers superior immunity to system
noise and does not require an A/D converter. Unlike two wire
serial temperature sensors, the TC625 communicates over
a single wire, and without serial protocol overhead.
The TC625 operates from supply voltages as low as
2.7V. Open drain (TC625N) and complimentary (TC625C)
output configurations are available. The TC625 is available
in TO-92 and SOT-23A-5 packages.
ORDERING INFORMATION
Part No.
Package
Output Config.
TC625CVNT
SOT-23A-5*
Complimentary
TC625CVZB
TO-92-3
Complimentary
TC625NVNT
SOT-23A-5*
Open Drain
TC625NVZB
TO-92-3
Open Drain
TC625EV
Evaluation Kit for the TC625 and TC12
NOTE: *SOT-23A-5 is equivalent to EIAJ (SC-74A).
PIN CONFIGURATIONS
TYPICAL APPLICATION
SOT-23A-5*
(Top View)
TO-92-3
1 23
2.7V to 5.5V
TC625
MEASUREMENT
ZONE
MICRO
CONTROLLER
I/O
4
5
TC625CVNT
TC625NVNT
1
2
3
DOUT ^VDD GND
NOTE: *SOT-23A-3 is equivalent
to EIAJ (SC-74A)
TC625CVZB
TC625NVZB
TTCC662255--0011 55/1/133/9/977 TelCom Semiconductor reserves the right to make changes in the circuitry an₁d specifications of its devices.