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The Intersil ICL8211/8212 are micropower bipolar monolithic integrated circuits intended primarily for precise voltage detection and generation. These circuits consist of an accurate voltage reference, a comparator and a pair of output buffer/drivers.
Specifically, the ICL8211 provides a 7mA current limited output sink when the voltage applied to the 'THRESHOLD' terminal is less than 1.15V (the internal reference). The ICL8212 requires a voltage in excess of 1.15V to switch its output on (no current limit). Both devices have a low current output (HYSTERESIS) which is switched on for input voltages in excess of 1.15V. The HYSTERESIS output may be used to provide positive and noise free output switching using a simple feedback network.
ICL8212 Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +30V Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +30V Hysteresis Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.5V to -10V Threshold Input Voltage . . . . . . . . . . . . . +30V to -5V with respect to GROUND and +0V to -30V with respect to V+ Current into Any Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 30mA
ICL8212 Features
• High Accuracy Voltage Sensing and Generation • Internal Reference 1.15V Typical • Low Sensitivity to Supply Voltage and Temperature Variations • Wide Supply Voltage Range Typ. 1.8V to 30V • Essentially Constant Supply Current Over Full Supply Voltage Range • Easy to Set Hysteresis Voltage Range • Defined Output Current Limit ICL8211 • High Output Current Capability ICL8212
ICL8212 Typical Application
• Low Voltage Sensor/Indicator • High Voltage Sensor/Indicator • Nonvolatile Out-of-Voltage Range Sensor/Indicator • Programmable Voltage Reference or Zener Diode • Series or Shunt Power Supply Regulator • Fixed Value Constant Current Source