QT11x

www.DataSheet4U.com QT11x VARIATIONS QT111 QT112 QT115 Longer recalibration timeouts Faster response time Variable gain, daisy-chaining 4 August 2004 Copyright QRG Ltd. (UK) Quantum Research Group Ltd. 4 August 2004 QT111-I / QT111H-I QProx™ 8-pin Sensor See QT110 datasheet for primary information. This sheet only lists differences with the QT110. This part is only available in -I suffix (-40..+85C) Description The QT111 is a touch sensor IC having recalibration timeouts (“max on-duration”) of 5 minutes and infinity. This allows the device to be used in situations where recalibration timeouts are not desired, for example in certain consumer, machine tool and process control applications where continuous touch over long periods is desired, like hand-on-joystick sensors, dead-man switches, etc. Although the primary application of the device is still as a ‘touch sensor’, longer timeouts also aknowledge alternate uses for the QT110 family, for example in process controls. Differences with QT110 The QT111 sensor is exactly the same in all respects to the QT110 with the following exceptions shown in bold (refer to Table 2-1 in the QT110 datasheet): Table 2-1 Output Mode Strap Options Tie Pin 3 to: DC Out DC Out Toggle Pulse Vdd Vdd Gnd Gnd Tie Pin 4 to: Vdd Gnd Gnd Vdd Max OnDuration 300s infinite 300s 300s All other operating modes, specifications, and wiring should be read from the QT110 data sheet. QT111H Version The QT111H version is the same as the QT111 except has an...