QT310-D ETC, QT310-D Datasheet
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QT310-D
Related parts for QT310-D
QT310-D Summary of contents
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... LQ P ROGRAMMABLE Appliance controls Access controls Security systems Micro-switch replacement AVAILABLE OPTIONS T SOIC + - +85 C QT310-IS Copyright © 2002 QRG Ltd QT310 QP ™ ROX C S APACITANCE ENSOR Material detection Toys & games 8-PIN DIP QT310-D - QT310/R1.03 21.09.03 IC ...
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... Only one low cost sampling capacitor is required for operation. A unique aspect of the QT310 is the ability of the designer to ‘clone’ a wide range of user-defined setups into the part’s eeprom during development and in production. Cloned setups can dramatically alter the behavior of the part ...
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... QT310 via earth. The QT310's PCB however can be physically quite small, so there may be little ‘free space’ coupling (Cx1 in Figure 1-4) between it and the environment to complete the return path. If the QT310 circuit ground cannot be grounded via the supply connections, then a ‘virtual capacitive ground’ may be required to increase return coupling ...
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... Cx lower and is encouraged. In the case LQ of the QT310, sensitivity can be high enough (depending on Cx and Cs) that 'walk-by' signals are a concern; if this is a problem, then some form of rear shielding may be required. ...
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... It is also possible to reduce sensitivity by making a capacitive divider with Cx by adding a low-value capacitor in series with the electrode wire. 1.5 TIMING Figure 1-7 and 1-8 shows the basic timing parameters of the QT310. The basic QT310 timing parameters are: Tbd Burst duration Tbs Burst spacing Tsc ...
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... PDC+1 sets the number of burst spacings, Tbs, that determines the interval of drift compensation, where: Example: then NDC operates in exactly the same way as PDC. 6 Tbs = Tbd + (SC x Tsc) where SC > 0 (Section 1.5.2) -or- Tbs = Tbd + 2.25ms where (Section 1.5.2) PDC = 9, (user setting) Tbs = 100ms Tpdc = (9+1) x 100ms = 1 sec Figure 2-1 Drift Compensation QT310/R1.03 21.09.03 ...
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... It is usually desirable to suppress detections generated by sporadic electrical noise or from quick contact with an object. To accomplish this, the QT310 incorporates a pair of detection integrator (‘DI’) counters that serve to filter out sporadic noise. These counters can also have the effect of slowing down response time if desired. ...
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... A clear pulse applied to the part is in the process of recalibrating due to a MOD timeout. The clear state of OUT can be set via the OUTP option (Section 2.7.1). 8 /CAL_CLR pin will clear the latch and make pin is sampled once per will clear the latch even if QT310/R1.03 21.09.03 ...
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... Cx changes (Section 2.8.2). SD selection affects which side of the reference the threshold and hysteresis points are placed (SD) ENSE IRECTION OSITIVE EFAULT M (DM) S ETECT ODE ELECTION : BG OR OBJ; D EFAULT : ACKGROUND ETECTION ODES 1 : BG1 OR BG2; D EFAULT : BG QT310/R1.03 21.09.03 ...
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... These are extremely powerful noise reduction Un methods. 7 The SYNC_I pin is used to trigger the QT310 to generate a OUT_N burst. The sleep timer will always wake the part if a sync 3 pulse has not been received before the sleep time expires. ...
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... If this is the case, power drain will be higher important to limit the pulse width to an amount less than the burst length (but greater than >15µs). Vdd 2.9 Using the sync feature, a QT310 can be synchronized 100pF R2 4.7k - 10K repetitive external source of interference such as the power 470K-1M line frequency (Figure 2-4) in order to dramatically reduce signal noise ...
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... LONE ORT ONNECTO cloning connector is used, place this close to the QT310. Placing the cloning connector far from the QT310 will increase the load capacitance Cx of the sensor line SNS1 and decrease sensitivity. Long distances on these lines can also make the cloning process more susceptible to communication errors from ringing and interference ...
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... M PREAD PECTRUM ODULATION The QT310 uses spread-spectrum burst modulation to dramatically reduce susceptibility to external noise sources. Spread-spectrum is implemented using frequency hopping between four ‘channels’ centered around 240kHz. The frequency of operation is altered with each successive burst; the total frequency spread is approximately ±7%. ...
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... Off 0 On Enabled 0 Can only be disabled when Disabled - 65,536 Reference (BG modes), Threshold (OBJ mode) 14 Calculation / Notes Unit Counts Counts Burst Cycles - Burst Cycles - - - - Secs/count Secs/count Tmod = (MOD + 1) x 256 x Tbs Seconds Tmod = (MOD + Tbs - - - - - - counts QT310/R1.03 21.09. ...
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... SIP SOP 5.4 SIGNAL PROCESSING Description 5.5 DC specifications Vdd = 3.0V 10nF 5pF recommended range, unless otherwise noted Parameter Description DD DDS Min Typ Max Min Typ Max Min Typ Max 15 O Units Notes Units Notes Units Notes QT310/R1.03 21.09. +150 C ...
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... Cx = 0pF 21pF 48pF 1.5 2357 Load (pf) 16 1.00 0.10 0. Load Figure 5-2 Typical sensitivity vs Cx; Threshold = 6, Vdd = 3.0 Volts 2 2.5 3 3.5 4 Power Supply (Volts) Figure 5-4 Tsc vs Vdd QT310/R1.03 21.09.03 4.7nF 9nF 19nF 43nF 74nF 124nF 200nF 50 4.5 5 5.5 ...
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... Figure 5-5 Typical internal signal count change vs Vdd 5.00% 4.00% 3.00% 2.00% 1.00% 0.00% -1.00% -2.00% -3.00% -4.00% -5.00% - 2.5 3 3.5 Vdd (Volts Temperature, C Figure 5-6: Typical Signal Deviation vs. Temperature Vdd = 5.0 Volts 10pF 5nF - 200nF PPS Film 17 4 4.5 5 5.5 QT310/R1.03 21.09.03 ...
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... Sampling Capacitor (nF) Figure 5-9 Power Consumption Selected values of Sleep Cycles 10pF, Vdd = 5.0 Volts 18 Sleep Cycles None One Two Three Five 50 60 Sleep Cycles None One Two Three Five Ten 50 60 Sleep Cycles None One Two Three Five Ten 50 60 QT310/R1.03 21.09.03 ...
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... L2 L Inches Min Max 0.24 0.28 0.3 0.325 0.355 0.4 0.3 - 0.027 0.037 0.014 0.022 0.045 0.07 0.008 0.012 0.1 - 0.015 - 0.115 0.15 - 0.21 0. φ h Inches Min Max 0.205 0.213 0.3 0.33 0.203 0.212 0.05 0.012 0.02 0.004 0.013 0.07 0.08 0.007 0.01 0.02 0.035 QT310/R1.03 21.09. Notes Typical BSC e E Notes BSC ...
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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 our Terms and Conditions of ...