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PDF LS6522 Data sheet ( Hoja de datos )
| Número de pieza | LS6522 | |
| Descripción | PIR SENSOR INTERFACE | |
| Fabricantes | LSI | |
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LSI/CSI
LS6522
U® L LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405
A3800
PIR SENSOR INTERFACE February 2014
FEATURES:
• Low Quiescent Current
• Direct Interface with PIR Sensor
• Two-Stage Differential Amplifier
• Amplifier Gain and Bandwidth externally controlled
• Window Comparator and Digital Filter limit Noise
• Triac or Relay Output Drive
• Programmable Output Duration Timer
• Ambient Light Level Inhibit input
• Selectable Dead Time
• Single or Dual Pulse Detection
• Timing derived from RC Oscillator or 50Hz/60Hz AC
• Regulated 5V Output for PIR Sensor
• Motion Detection LED Indicator
• LS6522 (DIP); LS6522-S (SOIC-NB);
LS6522-SW (SOIC-WB) - See Figure 1
PIN ASSIGNMENT - TOP VIEW
DIFF. AMP. 1 OUTPUT 1
DIFF. AMP. 2 INPUT (-) 2
DIFF. AMP. 2 OUTPUT 3
OSCILLATOR INPUT 4
AC INPUT 5
V SS 6
TRIAC/RELAY OUTPUT 7
V DD 8
16 DIFF. AMP 1 INPUT (-)
15 DIFF. AMP 1 INPUT (+)
14 5V REGULATOR OUTPUT
13 TIMER CONTROL INPUT
12 DEAD TIME SELECT INPUT
11 INHIBIT INPUT
10
PULSE MODE
SELECT INPUT
9 LED OUTPUT
APPLICATIONS:
Indoor occupancy sensors and outdoor motion-triggered
lighting for energy savings, security and convenience.
.
DESCRIPTION: (See Figure 2)
The LS6522 is a CMOS integrated circuit, designed for
detecting motion from a PIR Sensor and initiating appropri-
ate responses. The detailed description of the functional
blocks is as follows:
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 con-
nection 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 thresh-
olds 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.
FIGURE 1
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/RELAY output. The trigger
for the Timer 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. Logic 0 = Single Pulse Mode,
logic 1 = Dual Pulse Mode.
LED OUTPUT
This is an open drain output which is turned on by pulses
generated by a retriggerable one-shot. The one-shot is
triggered by the leading edge of pulses appearing at the
Digital Filter output. When turned on, this output can sink
current from a series Resistor-LED network returned to a
positive voltage (V DD to 12.5V maximum). This results in
the LED lighting whenever motion is detected.
6522-021214-1
1 page  
R1 = 36k:
R2 = 36k:
R3 = 2.7M:
R4 = 36k:
R5 = 2.7M:
R6 = 36k:
R7 = 270:, 1/2W
* R7 = 1k, 1W
VDD
R8 = 1k:
R9 = 620k:
R10 = 6.2k:
*R10 = 3.9k:
R12 = 1M:
R13 = 1.0M:
R14 = 910k:
R15 = 3.6k:
All Rs 1/4W, all Capacitors 10V
unless otherwise specified.
C1 = 100PF
C2 = 33PF
C3 = 0.01PF
C4 = 33PF
C5 = 0.01PF
C6 = 0.1PF
C7 = 0.47PF, 250V
*C7 = 0.33PF, 400V
S1 =SPDT (On – Off – On)
C8 = 1000pF
C9 = 0.1PF, 250V
*C9 = 0.1PF, 400V
C10 = 0.02PF, 25V
*C10 = 0.03PF, 25V
D1 = 1N4004
LDR = SILONEX HSL-19M52 (Typical)
Z1 = 9.1V, 1/2W
T1 = Q4008L4(Typical)
T1 = Q5004L4(Typical)
PIRs = Perkin-Elmer LHi 958 or 878, Nicera RE200B, SDA02-54 (Typical)
*= Component Change for 220VAC
NOTES: 1. The R9, R10, C9 network provides a 2.7V Peak-to-Peak AC signal input to Pin 5.
2. The C8, D1, Z1, C7, R7 components generate the DC Supply Voltage for the LS6522.
3. The R2, C2, R3, C3, R4, C4, R5, C5, R6, C6 components and the two on-chip Differential amplifiers
set a nominal gain of 5,500 with bandpass filtering of 0.13Hz to 6Hz.
4. The value of R6 may have to be adjusted if the particular PIR Sensor selected causes the input static voltage
at Pin 15 to be out of the input dynamic range. This is specified under Electrical Characteristics as 0V to 2.5V.
5. Sensitivity can be adjusted to a lower value by increasing the value of R2 or R4
or by decreasing the value of R3 or R5.
6522-021214-5
FIGURE 3. TYPICAL TRIAC WALL SWITCH APPLICATION
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LS6522.PDF ] | |
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