Non-contact Infrared Electronic Thermometer -- HT67F5640

Non-contact Infrared Electronic Thermometer
HT67F5640
Characteristics
 Operating Voltage : 3V or 9V battery ‒ external LDO required for 9V
 Standby current : < 10µA
 Measurement Range
◆
◆
Body temperature : 32°C ~ 42.9°C
Object temperature : 0°C ~ 100°C
 Accuracy : ±0.3°C
HT67F5640
MCU Solution
 Display Resolution : 0.1°C
 Measurement Distance : 5 ~ 15cm
 Internal EEPROM : 648 – for measurement data storage
 Integrated 20 bit resolution Σ-∆ A/D converter
 Integrated LDO, CP2, 10-bit TM3, LCD driver (284)
 Flash Program Memory : 4K16; RAM Data Memory : 2568
Application Areas
Small Household Electrical Appliances, Measuring Instruments,
Industrial Control, Medical and Health Equipments, etc.
Block Diagram
Thermopile
Sensor
Button5
284
LCD
20 bit
Σ-∆ A/D
I/O
204
LCD
HT67F5640
PWM
BAT.
Application Circuit
LDO
TM
Buzzer
LCD
20 SEGs  4 COMs
Thermopile Sensor
A/D Sampling Circuit