HT7500
Features
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Single-chip CMOS construction Single 1.5V battery operation Measurement range: +32.0~+42.0°C (+90.0~+108.0°F) Measurement accuracy: ±0.1°C (±0.2°F) Resolution: 0.1°C (0.1°F) Bonding option for Centigrade/Fahrenheit measurement
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- Alarm warning for fever Highest temperature hold Auto power off after 8 min 40 sec One-key input switch for ON/OFF Displays last time measured temperature
General Description
The HT7500 is a CMOS digital clinical thermometer IC for measuring body temperature in Centigrade (°C) or Fahrenheit (°F) mode by its bonding option. It also provides alarm and auto power off functions. The other electronic ponents are LCD display, thermister, 1.5V battery, ON/OFF switch, buzzer, resistors and capacitors.
Block Diagram
O S C I O S C O T E S T 2 P S W C L F H R F R S S C V D D V S S
S y s te m O S C
C o u n te r a n d C o m p a ra to r
T IM E R
L O W C B Z 1 B Z 2 C 5 1 2 C A P V E E
C o n tro l C ir c u it
V o lta g e D o u b le r C o...
