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UL
(R)
LSI/CSI
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747
LS6505
(631) 271-0400 FAX (631) 271-0405
November 2002
A3800
PIR SENSOR INTERFACE
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 APPLICATIONS: Wall and ceiling mounted occupancy sensors providing energy savings and convenience. DESCRIPTION (See Figure 2) The LS6505 is a CMOS integrated circuit, designed for detecting motion from a PIR Sensor and initiating appropriate responses. 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. SINGLE PULSE / DUAL PULSE MODES The logic level at the Pulse Mode Select input selects Single Pulse (SP) or Dual Pulse (DP) mode. The trigger for the Output Duration Timer is generated by requiring one (SP Mode) or two (DP Mode) pulses to be present at the Digital Filter output within a specified time period. SP Mode = 0; DP Mode = 1 OUTPUT DURATION TIMER (See Table 1 and Figure 3) The timeout is selected by the voltage level at the Timer Control input. The Timer's trigger is generated from pulses at the Digital filter output. In Auto operation, the Timer controls the On duration of the Triac output and is retriggerable. DEAD TIME (See Table 2) 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.
6505-110602-1
PIN ASSIGNMENT - TOP VIEW
DIFF. AMP. 1 OUTPUT DIFF. AMP. 2 INPUT (-) DIFF. AMP. 2 OUTPUT MODE SELECT INPUT AC INPUT V SS TRIAC OUTPUT 1 2 3 4 5 6 7 16 15 14 DIFF. AMP 1 INPUT (-) DIFF. AMP 1 INPUT (+) WARNING OUTPUT TIMER CONTROL INPUT DEAD TIME SELECT INPUT OPERATION SELECT INPUT PULSE MODE SELECT INPUT LED OUTPUT
LSI
LS6505
FIGURE 1
13 12 11 10 9
V DD 8
TRIAC OUTPUT This open drain output turns On when the Output Duration Timer is triggered. The output drives a Triac gate. With the Output Duration Timer On and a 2.7V P-P 60Hz signal applied to the AC input, this 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. 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. LED OUTPUT (See Figure 3) Normally, the status of the LED output is opposite to the Triac output, but in Auto operation the LED output flashes on for one second whenever motion is detected. MODE SELECT Open = Mode A, Vss = Mode B, VDD = Mode C OPERATION SELECT (See Figure 3, S1) The 3-state Operation Select input determines the operation of LS6505 in accordance with the selected Mode as shown below: Input VDD Open Vss Mode A On Auto Off Mode B (1) Prior Condition (2) Mode C (3) Auto (4)
(1) Momentary application of VDD turns on the Triac output and starts Auto operation. After the Triac output is off for 15 seconds, Auto operation terminates. (2) Momentary application of Vss turns off the Triac output. (3) Same as (1) except that Auto operation does not terminate. (4) Same as (2) except that after the Triac output is off for 8 seconds, Auto operation begins.
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 = -40C to +55C, 4.5V VDD 5.5V, unless otherwise specified.) PARAMETER SUPPLY CURRENT: VDD = 5V VDD = 4.5V - 5.5V DIFFERENTIAL AMPLIFIERS: Open Loop Gain, Each Stage Common Mode Rejection Ratio Power Supply Rejection Ratio Output Drive Current Input Sensitivity (Minimum Detectable Voltage to first amplifier when both amplifiers are cascaded for a net gain of 5,000) Input Dynamic Range Diff. Amp 2 Internal Reference COMPARATOR: Lower Reference Higher Reference DIGITAL FILTER: Input Pulse Width (for recognition) OUTPUT DRIVE CURRENT: Triac Warning: Source Current Sink Current TRIAC OUTPUT TIMING: Pulse Width Delay from zero crossover Delay difference between zero crossovers AC INPUT IMPEDANCE LED OUTPUT: Source Current Sink Current Pulse Width DUAL PULSE MODE: Time between pulse-pairs for motion recognition SYMBOL IDD IDD MIN TYP 150 180 MAX 200 240 UNIT A A CONDITIONS Triac and LED outputs not loaded
G CMRR PSRR ID VS
70 60 60 100
-
25 -
dB dB dB A V
TA = 25C, with Amplifier Bandpass configuration as shown in Figure 3
VIR
0 -
0.4VR
2.5 -
V V
-
VTHL VTHH
-
VIR - 0.5V VIR + 0.5V
-
V V
-
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 Vo =VDD - 0.5V Vo = 0.3V Max
TTPW TOD TODD
20 1.00 -
30 1.2 -
45 1.32 150
s ms s
VDD = 5V, f = 60Hz and 2.7V P-P AC input f = 60Hz
ZAC
270
-
-
k
-
IS+ ISTLPW
2 1 0.75
1
1.25
mA mA sec
Vo = VDD - 0.5V Vo = 0.3V f = 60Hz
TR
-
-
5.125
sec
f = 60Hz
6505-110102-2
TABLE 1 OUTPUT DURATION TIMER AS A FUNCTION OF TIMER CONTROL INPUT VOLTAGE (f = Frequency at AC input) INPUT VOLTAGE 0 1/16 VDD 2/16 VDD 3/16VDD 4/16 VDD 5/16 VDD 6/16 VDD 7/16 VDD 8/16 VDD 9/16 VDD 10/16 VDD 11/16VDD 12/16 VDD 13/16 VDD 14/16 VDD 15/16 VDD f = 50Hz 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 f = 50Hz 0 1.2 2.4 f = 60Hz 0 1 2 UNIT sec sec sec
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.
FIGURE 2. LS6505 BLOCK DIAGRAM
DIFF AMP 2 3 OUTPUT DIFF AMP 2 2 INPUT (-) DIFF AMP 1 OUTPUT WINDOW COMPARATOR
(+V)
8 VDD
1
COMP +
(-V)
6
VSS
DIFF AMP 1 INPUT (-)
16
AMP AMP
DIFF AMP 1 15 INPUT (+)
+
+V
+ COMP +
DIGITAL FILTER
1 SECOND PULSE GEN
9 LED OUTPUT PULSE MODE 10 SELECT INPUT OUTPUT BUFFER
PULSE SELECT LOGIC
7 TRIAC OUTPUT
TIMER CONTROL 13 INPUT
A/D CONVERTER
OUTPUT DURATION TIMER
CONTROL LOGIC
ZERO CROSS-OVER DETECT
5 AC INPUT
OPERATION SELECT INPUT 11 MODE SELECT INPUT 4
14
WARNING OUTPUT
DEAD TIME SELECT INPUT 12
DEAD TIME TIMER
6505-110102-3
FIGURE 3. TYPICAL WALL SWITCH OCCUPANCY SENSOR APPLICATION
R2 C2 + C1 R1
1 C3 + R3 2 AMP 2 (-)IN C4 V DD
NOTE: Open for Mode A Vss for Mode B V DD for Mode C
AMP 1 OUT
AMP 1 (-)IN AMP 1 (+)IN
16
15 R5 C5 V DD V DD R10 V DD
SPDT (On - Off - On)
PIR SENSOR
R4 3 AMP 2 OUT 14 13
WARNING
S1 (MODE A) ON
R9 R8 C8 V SS
SEE NOTE
4
MODE TIMER S E L E C T CONTROL AC DEAD TIME SEL
V DD AUTO
5
12
OFF S1 = SPDT (On - Off - On)
N
LOAD
R6
C6
D1 -
6 V SS OPERATION SEL PULSE MODE SEL
11
S1
V DC
S1 (MODE B, MODE C)
MT2 MT1 AC MAINS
TI Z1 G C11 +
C7 7 TRIAC OUT R7 10
V DD
SPDT (On - On)
R12
V DD
LED 8 V DD LED OUT 9 R11 Q1
S1 = SPDT (Mom - Off - Mom)
IN
P
SW V DC
U1
OUT
LS6505
V DD
R1 = 36k R2 = 2.7M R3 = 36k R4 = 2.7M R5 = 36k R6 = 240,1/2W * R6 = 1k,1W
*
R7 = 1k R8 = 910k R9 = 7.5k R9 = 3.6k R10 = 1.0M (variable) R11= 51k R12 = 10k
C9
C10
* * *
All Resistors 1/4W, all Capacitors 10V unless otherwise specified. PIR = HEIMANN LHi 958 or 878 (Typical)
C1 = 33F C9 = 33F C2 = 0.01F C10 = 0.1F C3 = 33F C11 = 0.033F C4 = 0.01F D1 = 1N4004 C5 = 0.1F Z1 = 24V, 1/2W C6 = 1.5F, 250V T1 = Q4008L4 (Typical) C6 = 1.0F, 400V * T1 = Q5004L4 (Typical) C7 = 1000F U1 = LM78L05 or equivalent C8 = 0.1F, 250V (5V Regulator) C8 = 0.1F, 400V Q1 = MPS8099 = 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 4. ADAPTING WALL SWITCH FOR 3-WAY OPERATION
Occupancy Sensor Module AC Hot S from MT2 Remote Control S = SPST (Mom-Off) R to LS6505-11 C Vss R = 510k , 1 / 4 W C = 0.01F, 10V
Remote Switch Module AC Hot
To P To Load
When operated in Mode B or Mode C, the wall switch occupancy sensor shown in Figure 3 can easily be adapted to operate with a remote switch by adding an R-C network to the occupancy sensor module. R limits the current from the remote module into Pin 11 of the LS6505 and C suppresses noise.
6505-110602-4

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