LSI/CSI UL ® LS6505 LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405 A3800 PIR MOTION SENSOR INTERFACE PRELIMINARY DIFFERENTIAL AMPLIFIER Each stage of the two stage Differential Amplifier can be set to have its own amplification and bandwidth. The two inputs to the first stage allow for single ended or differential connection to PIR Sensors. This stage can be biased anywhere in its dynamic range. The second stage is internally biased so that the Window Comparator’s lower and higher thresholds can be fixed relative to this bias. WINDOW COMPARATOR The Window Comparator provides noise filtering by enabling only those signals equal to or greater than a fixed threshold at the output of the Differential Amplifier to appear at the output of the Window Comparator. COMPARATOR DIGITAL FILTER The output of the Window Comparator is filtered so that motion must be present for a certain duration before it can be recognized and appear as pulses at the Digital Filter output. OUTPUT DURATION TIMER The voltage level at the Timer Control input can select 16 different timeouts for this Timer (See Table 1). The selection can be made by varying the setting of a potentiometer. The Timer is retriggerable and controls the On duration of the Triac output. The trigger for theTimer is generated from pulses appearing at the Digital Filter output. SINGLE PULSE/DUAL PULSE MODES A Single Pulse or Dual Pulse (two pulses occurring within a specified time period) at the Digital Filter output can be selected as the trigger for the Output Duration Timer. This selection is made by the logic level at the Pulse Mode Select input. Single Pulse Mode = 0, Dual Pulse Mode = 1 MODE SELECT Open = Mode A, Vss = Mode B, VDD = Mode C 6505-041602-1 DIFF. AMP. 1 OUTPUT 1 DIFF. AMP. 2 INPUT (-) 16 DIFF. AMP 1 INPUT (-) 2 15 DIFF. AMP 1 INPUT (+) DIFF. AMP. 2 OUTPUT 3 14 WARNING OUTPUT MODE SELECT INPUT 4 13 TIMER CONTROL INPUT AC INPUT 5 12 DEAD TIME SELECT INPUT 6 11 MODE INPUT 7 10 PULSE MODE SELECT INPUT 8 9 V SS TRIAC OUTPUT V DD LS6505 DESCRIPTION: (See Figure 2) The LS6505 is a monolithic, CMOS Silicon Gate integrated circuit, designed for detecting motion from a PIR Sensor and initiating appropriate responses. The detailed description of the functional blocks is as follows: PIN ASSIGNMENT - TOP VIEW LSI FEATURES: • Direct Interface with PIR Sensor • Two-Stage Differential Amplifier • Amplifier Gain and Bandwidth externally controlled • Window Comparator and Digital Filter limit Noise • Triac Output Drive • Programmable Output Duration Timer • Selectable Dead Time • Single or Dual Pulse Detection • Timing derived from 50Hz/60Hz AC • Motion Detection LED Indicator • LS6505 (DIP), LS6505-S (SOIC)- See Figure 1 April 2002 LED OUTPUT FIGURE 1 LED OUTPUT When the Triac output is off, the LED output is on. When the Triac output is on, the LED output is off. When in Auto operation, the LED output is turned on when motion is detected. (See Figure 3) MODE: Mode A: VDD = On, Open = Auto, Vss = Off Momentary VDD Mode B: On/Auto (until Off)* Mode C: On/Auto Open Momentary Vss Normally Off Off Auto Off for 8 sec/Auto *After the light goes off, an additional 15 seconds remains for Motion to turn the lights back on again. This visual warning can be used in place of the Warning output and associated external circuitry. WARNING OUTPUT This output goes high for 2 sec beginning 7.5 sec before the Triac output turns off. This signal can be used to trigger an audible or visual alert. DEAD TIME False turn-ons are prevented from occurring by establishing a Dead Time between the end of the timeout of the Output Duration Timer and the retriggering of that Timer. The state of the Dead Time Select input determines the Dead Time duration (See Table 2). TRIAC OUTPUT This open drain output turns On when the Output Duration Timer is triggered. The output drives a Triac. With the Output Duration Timer On and a 2.7V P-P 60Hz signal applied to the AC input, the output produces a negative going pulse in each half-cycle delayed a nominal 1.2ms from the zero crossing. There is no more than 150us difference between the zerocrossing delay of each pulse. ABSOLUTE MAXIMUM RATINGS: PARAMETER DC supply voltage Any input voltage Operating temperature Storage temperature SYMBOL VDD - VSS VIN TA TSTG VALUE +5.5 VSS - 0.3 to VDD + 0.3 -40 to +85 -65 to +150 UNIT V V °C °C ELECTRICAL CHARACTERISTICS: ( All voltages referenced to VSS, TA = -40˚C to +55˚C, 4.5V ≤ VDD ≤ 5.5V, unless otherwise specified.) PARAMETER SUPPLY CURRENT: VDD = 5V VDD = 4.5V - 5.5V MIN TYP MAX UNIT IDD IDD - 150 180 200 240 µA µA Triac and LED outputs not loaded G CMRR PSRR 70 60 60 - Output Drive Current ID - - 25 dB dB dB µA - Input Sensitivity (Minimum Detectable Voltage to first amplifier when both amplifiers are cascaded for a net gain of 7,500) VS 70 - - µV TA = 25˚C, with Amplifier DIFFERENTIAL AMPLIFIERS: Open Loop Gain, Each Stage Common Mode Rejection Ratio Power Supply Rejection Ratio SYMBOL CONDITIONS Bandpass configuration as shown in Figure 3 - 0 - 2.5 V - VIR - .4VR - V - COMPARATOR: Lower Reference Higher Reference VTHL VTHH - VIR - 0.5V VIR + 0.5V - V V - DIGITAL FILTER: Input Pulse Width (for recognition) TPW TPW 66.3 79.6 - - ms ms 60Hz operation 50Hz operation IO Iw + Iw - -40 2 1 - - mA mA mA With 3V Triac Gate Drive Vo =VDD -0.5V Vo = 0.3V Max TTPW TOD 20 1.00 30 1.2 45 1.32 µs ms VDD = 5V, f = 60Hz and - - 150 µs f = 60Hz Input Dynamic Range Diff. Amp 2 Internal Reference OUTPUT DRIVE CURRENT: Triac Warning: Source Current Sink Current TRIAC OUTPUT TIMING: Pulse Width Delay from zero crossover 2.7V P-P AC input Delay difference between zero crossovers TODD AC INPUT IMPEDANCE ZAC 270 - - kΩ - LED OUTPUT: Source Current Sink Current IS+ IS- 2 1 - - mA mA Vo =VDD - 0.5V Vo = 0.3V TLPW 0.75 1 1.25 sec f = 60Hz - - 5.125 sec f = 60Hz Pulse Width DUAL PULSE MODE: Time between pulse-pairs for motion recognition 6505-041162-2 TR TABLE 1 OUTPUT DURATION TIMER AS A FUNCTION OF TIMER CONTROL INPUT VOLTAGE (f = Frequency at AC input) INPUT VOLTAGE f = 50Hz 0 1/16 VDD 2/16 VDD 3/16 VDD 4/16 VDD 5/16 VDD 6/16 VDD 7/16 VDD 8/16 VDD 9/16 VDD 10/16 VDD 11/16 VDD 12/16 VDD 13/16 VDD 14/16 VDD 15/16 VDD 18 36 54 72 2.4 3.6 4.8 6 7.2 8.4 9.6 10.8 12 14.4 16.8 18 f = 60Hz 15 30 45 60 2 3 4 5 6 7 8 9 10 12 14 15 UNIT sec sec sec sec min min min min min min min min min min min min TABLE 2 DEAD TIME DURATION AS A FUNCTION OF THE STATE OF DEAD TIME SELECT INPUT (f = Frequency at AC input) INPUT STATE 0 OPEN 1 DIFF AMP 2 OUTPUT f = 50Hz f = 60Hz 0 1.2 2.4 0 1 2 UNIT sec sec sec 3 DIFF AMP 2 2 INPUT (-) WINDOW COMPARATOR DIFF AMP 1 1 OUTPUT (+V) (-V) 8 VDD 6 VSS COMP DIFF AMP 1 16 INPUT (-) + - AMP DIFF AMP 1 15 INPUT (+) + DIGITAL FILTER AMP +V + 1 SECOND PULSE GEN 9 LED OUTPUT COMP + PULSE SELECT LOGIC OUTPUT BUFFER TIMER CONTROL 13 INPUT A/D CONVERTER OUTPUT DURATION TIMER CONTROL LOGIC MODE INPUT 11 DEAD TIME SELECT INPUT 12 DEAD TIME TIMER FIGURE 2. LS6505 BLOCK DIAGRAM 6505-041602-3 7 ZERO CROSS-OVER DETECT TRIAC OUTPUT 5 14 MODE SELECT INPUT 4 PULSE MODE SELECT INPUT 10 AC INPUT WARNING OUTPUT R2 C2 1 + AMP 1 OUT C3 R3 2 C4 R8 LOAD R6 4 SEE NOTE C8 C6 5 D1 MT1 AC MAINS TI Z1 WARNING C5 14 DEAD TIME SEL 12 AC S1 (MODE A) V DD ON 13 R10 V DD AUTO V DD OFF SPDT (On - Off - On) S1 = SPDT (On - Off - On) 6 C7 + PIR SENSOR 15 MODE TIMER S E L E C TCONTROL V SS MT2 AMP 1 (+)IN V DD AMP 2 OUT V SS N R1 R5 3 R9 AMP 1 (-)IN R4 V DD NOTE: Open for Mode A Vss for Mode B V DD for Mode C AMP 2 (-)IN + C1 - 16 11 MODE S1 V DC S1 (MODE B, MODE C) 7 TRIAC OUT 8 V DD G C11 10 PULSE MODE SEL V DD R12 SPDT (On - On) V DD R7 IN P SW V DC U1 OUT V DD C9 R1 = 36kΩ R2 = 2.7MΩ R3 = 36kΩ R4 = 2.7MΩ R5 = 36kΩ R6 = 270Ω,1/2W R6 * = 1kΩ,1W R11 Q1 S1 = SPDT (Mom - Off - Mom) LS6505 C10 R7 = 1kΩ R8 = 910kΩ R9 = 7.5kΩ R9 = 3.6kΩ * R10 = 1.0MΩ(variable) R11= 10kΩ R12 = 3.6kΩ All Resistors 1/4W, all Capacitors 10V unless otherwise specified. 9 LED OUT C1 = 33µF C2 = .01µF C3 = 33µF C4 = .01µF C5 = .1µF C6 = .68µF, 250V = .47µF, 400V * C6 C7 = 1000µF C8 = .1µF, 250V * C8 = .1µF, 400V * C9 = 10µF C10 = .1µF C11 = .033µF D1 = 1N4004 Z1 = 15V, 1/2W T1 = Q4008L4 (Typical) T1 = Q5004L4 (Typical) U1 = LM78L05 or equivalent (5V Regulator) Q1 = MPS8099 PIR = HEIMANN LHi 958 or 878 (Typical) = Component change for 220VAC * NOTES: 1. The R8, R9, C8 network provides a 2.7V Peak-to-Peak AC signal input to Pin 5. 2. The C7, D1, Z1, C6, R6 components generate the DC Supply Voltage for the LS6505. 3. The R1, C1, R2, C2, R3, C3, R4, C4, R5, C5 components and the two on-chip Differential Amplifiers set a nominal gain of 5,500 with bandpass filtering of 0.13Hz to 6Hz. FIGURE 3. TYPICAL WALL SWITCH APPLICATION The information included herein is believed to be accurate and reliable. However, LSI Computer Systems, Inc. assumes no responsibilities for inaccuracies, nor for any infringements of patent rights of others which may result from its use. 6505-041902-4