器件名称:
AD22105
功能描述:
Low Voltage, Resistor Programmable Thermostatic Switch
文件大小:
262.71KB 共8页
简 介:
a FEATURES User-Programmable Temperature Setpoint 2.0C Setpoint Accuracy 4.0C Preset Hysteresis Wide Supply Range (+2.7 V dc to +7.0 V dc) Wide Temperature Range (–40 C to +150C) Low Power Dissipation (230 W @ 3.3 V) APPLICATIONS Industrial Process Control Thermal Control Systems CPU Monitoring (i.e., Pentium) Computer Thermal Management Circuits Fan Control Handheld/Portable Electronic Equipment Low Voltage, Resistor Programmable Thermostatic Switch AD22105 FUNCTIONAL BLOCK DIAGRAM AD22105 200k RPULL–UP 1 8 NC OUT 2 SET– POINT 3 7 VS GND 6 RSET NC 4 TEMPERATURE SENSOR 5 NC GENERAL DESCRIPTION The AD22105 is a solid state thermostatic switch. Requiring only one external programming resistor, the AD22105 can be set to switch accurately at any temperature in the wide operating range of –40°C to +150°C. Using a novel circuit architecture, the AD22105 asserts an open collector output when the ambient temperature exceeds the user-programmed setpoint temperature. The AD22105 has approximately 4°C of hysteresis which prevents rapid thermal on/off cycling. The AD22105 is designed to operate on a single power supply voltage from +2.7 V to +7.0 V facilitating operation in battery powered applications as well as in industrial control systems. Because of low power dissipation (230 W @ 3.3 V), selfheating errors are minimized and battery life is maximized. An optional internal 200 k pull-up resistor is included to facilitate driving light loads such as CMOS inputs. Alter……
