qt510 Quantum Research Group, qt510 Datasheet
qt510
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qt510 Summary of contents
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... The sense element can also be used as a proximity sensor out to several centimeters, to wake up an appliance or display from a sleep mode in a dramatic fashion. The QT510 can report a single rapid touch anywhere along the sense element, or, it can track a finger moving along the wheel surface in real time. The device self-calibrates under command from a host controller. ...
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... Cross-talk suppression: If two or more QT510’s are used in close proximity, or there are other QTouch™ type device(s) close by, the devices can interfere strongly with one another to create position jitter or false triggering ...
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... O Active high when hand approaches and during touch. May be left unconnected. Note (1) 13 DRDY O Data ready output. Goes high to indicate it is possible to communicate with the QT510. Note (1) 14 VSS Ground Negative power pin Note (1): Pin floats ~400µs after wake from Sleep mode. ...
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... ESD and assist with EMC compliance. 2.4 Power Supply The usual power supply considerations with QT parts applies also to the QT510. The power should be very clean and come from a separate regulator if possible. This is particularly critical with the QT510 which reports continuous position as opposed to just an on/off output. ...
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... Do use a ground plane under and around the QT510 itself, back to the regulator and power connector (but not beyond the Cs capacitor not place an electrode (or its wiring) of one QT510 device near the electrode or wiring of another device QT510 R6.04/0505 ...
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... There should be one dedicated /SS line for each QT510 from the host controller. A DRDY (‘data ready’) line is used to indicate to the host controller when it is possible to talk to the QT510. 3.1 Power-up Timing Delay Immediately after power-up, DRDY floats for approximately 20ms, then goes low ...
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... DRDY Line The DRDY line acts primarily as a way to inhibit the host from clocking to the QT510 when the QT510 is busy. It also acts to signal to the host when fresh data is available after a burst. The host should not attempt to clock data to the QT510 when DRDY is low, or the data will be ignored or cause a framing error ...
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... The prox bit in the standard response and the PROX pin will both go high if the signal exceeds this threshold. 0x4P power-up default setting QT510 R6.04/0505 ...
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... Note: the Null can be replaced by an empty /SS pulse if there is no need for fast updates. 9 automatically on power-up) a. 0x00 (Null) - all commands except: b. 0x03 (Drift compensate) - replace every nth Null command where typically there is ever an error bit set, send a 0x01. QT510 R6.04/0505 ...
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... Variable parameter under host control kHz Modulated spread-spectrum (chirp) µs ms kHz Units Notes counts Both prox and touch detection Host controlled variable Host controlled variable % % of threshold setting % % of threshold setting % % of bursts; host controlled % Depends on element linearity, layout QT510 R6.04/0505 + +125 O C ...
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... BSC 0.014 0.020 0.016 0.050 0.008 0.010 0.014 0.020 MILLIMETERS MAX MIN NOM MAX 14 0.65 0.043 1.10 0.006 0.05 0.10 0.15 0.256 6.25 6.38 6.50 0.177 4.30 4.40 4.50 0.201 4.90 5.00 5.10 0.028 0.50 0.60 0. 0.008 0.09 0.15 0.20 0.012 0.19 0.25 0. QT510 R6.04/0505 ...
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... Ordering Information PART NO. QT510-ISG QT510-ISSG lQ TEMP RANGE PACKAGE - + SO- TSSOP-14 12 MARKING QT510 QT510 QT510 R6.04/0505 ...
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... E510 QWheel™ Board Pictures lQ Figure 5.1 - E510 Eval Board (front, back) 13 QT510 R6.04/0505 ...
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Tel: +44 (0)23 8056 5600 Fax: +44 (0)23 80565600 This device covered under one or more of the following United States and international patents: 5,730,165, 6,288,707, 6,377,009, 6,452,514, 6,457,355, 6,466,036, 6,535,200. Numerous further patents are pending which may apply ...