QT100A-ISG Atmel, QT100A-ISG Datasheet
QT100A-ISG
Specifications of QT100A-ISG
Related parts for QT100A-ISG
QT100A-ISG Summary of contents
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... The QT100A charge-transfer (‘QT’) touch sensor is a self-contained digital IC capable of detecting near-proximity or touch. It will project a touch or proximity field through any dielectric like glass, plastic, stone, ceramic, and even most kinds of wood. It can also turn small metal-bearing objects into intrinsic sensors, making them responsive to proximity or touch ...
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... Pwr Ground Pwr Power I Unused I Sync & Mode Input O Unused O Output state 2 Notes If Unused Key - Leave open - do not connect Leave open - do not connect Ground - +2.0 ~ +5.5V - Always connect to Sync - Leave open - do not connect - C opyright © 2008 QRG Ltd. QT100A_1R7.01_0308 ...
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... Metal areas near the electrode will reduce the field strength and increase Cx loading and should be avoided, if possible. Keep ground away from the electrodes and traces. 1.4.3 Decreasing Sensitivity In some cases the QT100A may be too sensitive. In this case gain can be easily lowered by decreasing Cs. opyright © ...
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... Fast mode is approximately 1ms, as shown in Figure 2.2. sleep 2.1.3 Low Power Mode (SYNC = 0) The QT100A runs in Low Power (LP) mode if the SYNC pin is held low. In this mode it sleeps for approximately 85ms at the end of each burst, saving power but slowing response. On detecting a possible key touch, it temporarily switches to Fast mode until either the key touch is confirmed or found to be spurious (via the detect integration process) ...
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... If no detection is sensed prior to the final count, the counter is reset immediately to zero. In the QT100A, the required count is four mode the device will switch to Fast mode temporarily in order to resolve the detection more quickly; ...
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... QT100A. The QT100A will track slow changes in Vdd, but it can be badly affected by rapid voltage fluctuations highly recommended that a separate voltage regulator be used just for the QT100A to isolate it from power supply shifts caused by other components. If desired, the supply can be regulated using a Low Dropout (LDO) regulator, although such regulators often have poor transient line and load stability ...
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... Cs, Cx dependent µs ±7.5% spread spectrum variation µs ±7.5% spread spectrum variation ms ms Increases with decreasing Vdd, Cs and Cx dependent ms µs Notes See Note 1 See Note 1 secs Will vary in SYNC mode, and with V C opyright © 2008 QRG Ltd. QT100A_1R7.01_0308 + 0.6) Volts DD ...
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... Min Typ Max 600 6 100 0.8 2.2 0.6 V -0.7 DD ±1 0 100 Units Notes µ µ V/s Required for proper start-up V SYNC pin V SYNC pin V OUT, 4mA sink V OUT, 1mA source µA pF bits C opyright © 2008 QRG Ltd. QT100A_1R7.01_0308 ...
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... Ref 2.95 3.00 2.25 2.30 2.95 3.00 1.35 1.40 - 0.95 0.30 0.35 0.00 - Order Code QT100A-ISMG QT100A-ISG Peak Body Temperature TBD O 260 Max. 0.80 0.05 0. 3.05 2.35 3.05 1.45 - 0.40 0.075 MSL Rating ...
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Tel: +44 (0)23 8056 5600 Fax: +44 (0)23 8045 3939 The specifications set out in this document are subject to change without notice. All products sold and services supplied by QRG are subject to QRG’s Terms and Conditions of ...