QT310-IS Atmel, QT310-IS Datasheet
QT310-IS
Specifications of QT310-IS
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QT310-IS Summary of contents
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... SER ROGRAMMABLE Appliance controls Access controls Security systems Microswitch replacement AVAILABLE OPTIONS T SOIC + - +85 C QT310-IS Copyright © 2002 QRG Ltd QT310 QP ™ ROX A S DVANCED ENSOR Material detection Toys & games 8-PIN DIP QT310-D - QT310/R1.01 07/02 IC ...
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... Only two low cost, non-critical capacitor are 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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... 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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... The resulting timing is Tbs: Tbs = All the basic timing parameters of the QT310 such as recalibration delay etc. are dependent on Tbs the device never sleeps between bursts (Figure 1-8). This mode is fast but consumes maximum power also unregulated in timing from burst to burst, depending on the burst lengths ...
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... Cx slowly decreases (see Section 2.8.1 > 0, then PDC+1 sets the number of burst spacings, Tbs, that determines the interval of drift compensation, where: Example: then 6 Tbs = (Section 1.5.1) PDC = 9, (user setting) Tbs = 100ms Tpdc = (9+1) x 100ms = 1 sec Figure 2-1 Drift Compensation QT310/R1.01 07/02 ...
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... See Figure 2-2 for operation 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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... If any underlying threshold detection remains active for longer than the Max On-Duration (MOD) period the device will recalibrate automatically, but the OUT pin will not change state. 8 /CAL_CLR pin will clear the latch and make pin is sampled once per QT310/R1.01 07/02 ...
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... BG2 mode the calibration reference is more internal signal stored in eeprom and reused until the next calibration. Hysteresis can be altered as per Section 2. (SD) ENSE IRECTION P OSITIVE : EFAULT : M (DM) S ETECT ODE ELECTION : BG OBJ EFAULT ) D M ACKGROUND ETECTION ODES 1 : BG1 BG2 EFAULT QT310/R1.01 07/02 ...
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... Sync is a powerful feature that permits two important operating modes: Daisy-chaining, and noise synchronization. U2 The SYNC_I pin is used to trigger the QT310 to generate a 7 burst. The sleep timer will always wake the part if a sync OUT2 pulse has not been received before the sleep time expires. ...
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... If the power supply is shared with another electronic system, care should be taken to assure that the supply is free of spikes, sags, and surges. In BG1 mode the QT310 will track slow changes in Vdd if drift compensation is enabled, but it can be adversely affected by rapid voltage steps and spikes at the millivolt level ...
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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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... The additional capacitive loading of the interface pins will contribute to Cx; also, noise on the interface lines can cause erratic operation. The internal eeprom has a life expectancy of 100,000 erase/write cycles. A serial interface specification for the device can be obtained by contacting Quantum. 13 QT310/R1.01 07/02 ...
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... Reference (BG modes), Threshold (OBJ mode) 14 Calculation / Notes Unit Counts Counts Burst Cycles - Burst Cycles - - - - Tndc = (NDC + Tbs Seconds Tndc = (NDC + 1) x Tbs Tpdc = (PDC + Tbs Seconds Tpdc = (PDC + 1) x Tbs Tmod = (MOD + 1) x 256 x Tbs Seconds Tmod = (MOD + Tbs - - - - - counts QT310/R1.01 07/ ...
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... Parameter Description SIP SOP 5.4 SIGNAL PROCESSING Description 5.5 DC specifications Vdd = 3.0V 10nF 5pF recommended range, unless otherwise noted Parameter Description DD DD DDS Min Typ Max Min Typ Max Min Typ Max 15 O Units Notes Units Notes Units Notes QT310/R1.01 07/ +150 C ...
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... Cx = 48pF 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 Typical Burst spacing vs Vdd and Tbd < 10ms QT310/R1.01 07/02 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 LQ 2 2.5 3 3.5 Vdd (Volts) 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/R1.01 07/02 ...
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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/R1.01 07/02 ...
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... M H 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/R1.01 07/ 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 ...