ICL8211 Harris Corporation, ICL8211 Datasheet
ICL8211
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ICL8211 Summary of contents
Page 1
... 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 out- put 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 ...
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... Functional Diagram VOLTAGE REFERENCE 1.15V Q7 Q23 R1 20M 30k ICL8211 OPTION ICL8212 OPTION ICL8211, ICL8212 COMPARATOR OUTPUT BUFFERS Q4 Q17 Q16 Q14 Q15 V REF Q12 Q13 R3 360k Q10 Q11 Q20 7-162 Q18 4.5k 2 HYST Q19 ...
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... CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Operating Conditions Operating Temperature Range ICL8211M/8212M . . . . . . . . . . . . . . . . . . . . . . . . -55 ICL8211C/8212C . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Electrical Specifications V+ = 5V, T PARAMETER SYMBOL ...
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... Hysteresis Current NOTES: 1. The maximum output current of the ICL8211 is limited by design to 15mA under any operating conditions. The output voltage may be sustained at any voltage up to +30V as long as the maximum power dissipation of the device is not exceeded. 2. The maximum output current of the ICL8212 is not defined. And systems using the ICL8212 must therefore ensure that the output current does not exceed 30mA and that the maximum power dissipation of the device is not exceeded ...
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... FIGURE 4. SUPPLY CURRENT AS A FUNCTION OF THRESH 0.9V = 1.3V +35 +65 +95 +125 o C FIGURE 6. OUTPUT SATURATION CURRENTS AS A FUNC- 7-165 + 1. 4.5V HYS (OR -0.5V WITH RESPECT TO V+ SUPPLY) -10 -20 -25 ICL8211 OR ICL8212 -30 -40 -20 0 +20 +40 +60 o TEMPERATURE ( C) A FUNCTION OF TEMPERATURE 150 + +5V 125 OUTPUTS OPEN CIRCUIT 100 ...
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... FIGURE 7. THRESHOLD VOLTAGE TO TURN OUTPUTS “JUST ON” FUNCTION OF TEMPERATURE -55 -25 +5 +35 TEMPERATURE ( FIGURE 9. OUTPUT SATURATION CURRENT AS A FUNCTION OF TEMPERATURE FIGURE 11. HYSTERESIS OUTPUT CURRENT AS A FUNCTION OF HYSTERESIS OUTPUT VOLTAGE ICL8211, ICL8212 (ICL8211 ONLY) (Continued + 1mA +5V O OUT HYS HST +35 +65 ...
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... I = 1mA OUT HYS HYS 1.16 1.15 1.14 -55 -25 +5 TEMPERATURE ( FIGURE 16. THRESHOLD VOLTAGE TO TURN OUTPUTS “JUST ON” FUNCTION OF TEMPERATURE ICL8211, ICL8212 (ICL8212 ONLY) = 1. FIGURE 13. SUPPLY CURRENT AS A FUNCTION OF THRESH 1. 0.9V TH +125 +95 +35 + FIGURE 15. OUTPUT SATURATION CURRENTS AS A FUNC- ...
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... FIGURE 20. HYSTERESIS OUTPUT CURRENT AS A FUNCTION OF HYSTERESIS OUTPUT VOLTAGE ICL8211, ICL8212 Detailed Description The ICL8211 and ICL8212 use standard linear bipolar integrated circuit technology with high value thin film resistors which define extremely low value currents. Components Q accurate voltage reference of 1.15V. This reference voltage ...
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... ICL8211, ICL8212 is available for base as TTL or CMOS using a single pullup resistor. There guaranteed TTL fanout of 2 for the ICL8211 and 4 for the ICL8212. A principal application of the ICL8211 is voltage level detection, and for that reason the OUTPUT current has been limited to typically 7mA to permit direct drive of an LED connected to the positive supply without a series current limiting resistor ...
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... For low values of hyster- esis, circuit Figure 27B preferred due to the offset voltage of the hysteresis output transistor. A third way to obtain hysteresis (ICL8211 only connect a resistor between the OUTPUT and the THRESHOLD V+ terminals thereby reducing the total external resistance ...
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... TR2 R P FIGURE 27B. OFF ON V TR1 SUPPLY VOLTAGE FIGURE 27C. FIGURE 27. TWO ATERNATIVE VOLTAGE DETECTION CIRCUITS EMPLOYING HYSTERESIS TO PROVIDE PAIRS OF WELL DEFINED TRIP VOLTAGES ICL8211, ICL8212 150k V O NOTE 1. R FIGURE 28. LOW VOLTAGE BATTERY INDICATOR ) x 1.15 + 0.1V 2 volts ...
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... SUPPLY VOLTAGE FIGURE 31. OUTPUT STATES OF THE ICL8211 AND ICL8212 AS A FUNCTION OF THE SUPPLY VOLTAGE ICL8211, ICL8212 of the supply voltage that will result in the output of the ICL8211 changing from the ON state to the OFF state. This may be achieved only by shorting out R3 for values of supply ...
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... turned on for sufficient time to discharge C stant the desired output polarities for low and high input frequen- cies, either an ICL8211 or an ICL8212 may be used as the output driver This circuit is sensitive to supply voltage variations and C 1 should be used with a stabilized power supply. At very low frequencies the output will switch at the input frequency ...
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... switch break. By proportioning the time con- 1 stant approximately the manufacturer’s bounce time 1 1 the output as terminal #4 of the ICL8211/8212 will be a single transition of state per desired switch closure ICL8212 INPUT ...