quick question about setting hysteresis on the ad594. in the datasheet (http://www.analog.com/static/imported-files/data_sheets/AD594_595.pdf) they show a resistor from Vout to pin 3. i understand its 200nA per degree C, but in their setpoint controller uses basis comparator to bring Vout high if the setpoint is exceeded. so i have a couple of questions:
1. how does hysteresis work if the injection current is only present when Vout goes high?
2. how to determine resistor value for a specific hysteresis? would it not be better to use a voltage ref IC and resistor to feed the hysteresis injection pin?
1. how does hysteresis work if the injection current is only present when Vout goes high?
2. how to determine resistor value for a specific hysteresis? would it not be better to use a voltage ref IC and resistor to feed the hysteresis injection pin?
