SENSOR INTERFACE. LS6522 Datasheet

LS6522 INTERFACE. Datasheet pdf. Equivalent

LS6522 Datasheet
Recommendation LS6522 Datasheet
Part LS6522
Description PIR SENSOR INTERFACE
Feature LS6522; LSI/CSI LS6522 U® L LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 27.
Manufacture LSI
Datasheet
Download LS6522 Datasheet




LSI LS6522
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



LSI LS6522
INHIBIT
The Output Duration Timer can be inhibited from trig-
gering by the voltage level at the INHIBIT input. When this
voltage level exceeds the Inhibit Threshold, the Timer will
be prevented from triggering if it is OFF. If the Timer is
ON, the INHIBIT input is blocked from affecting the Timer.
There is approximately 10% hysteresis between the In-
hibit and Enable thresholds at the INHIBIT input. The LED
output is not affected by the INHIBIT input. An adjustable
Ambient Light Level Inhibit can be implemented by con-
necting a Light Determining Resistor (LDR) network to the
INHIBIT input (See Figures 3 and 4).
DEAD TIME
False turn-ons are prevented from occurring by es-
tablishing 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 de-
termines the Dead Time duration (See Table 2).
OSCILLATOR
For battery operation, an external RC is connected to the
OSCILLATOR input to produce a 50Hz or 60Hz clock. A
30Hz clock can be used to extend timing durations (See
Tables 1 and 2).
DC POWER SUPPLY
VDD - Vss is 8V ± 1V. Typical quiescent current is 250μA
(TRIAC/RELAY, LED and REGULATOR outputs not loaded).
DC REGULATOR
The LS6522 includes a Regulator which provides a
nominal +5V to the Differential Amplifier and Window
Comparator and is available as an output to supply the
PIR Sensor.
TRIAC/RELAY OUTPUT
This open drain output turns ON when the Output Dura-
tion Timer is triggered. The output drives a Triac when
the OSCILLATOR input is tied to ground and 50/60Hz is
applied to the AC input (See Figure 3). The output drives
a Relay when the AC input is tied to ground and an RC
network is connected to the OSCILLATOR input (See
Figure 4).
TRIAC DRIVE (See Figure 3)
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 150μs difference between the zero-crossing delay
of each pulse.
RELAY DRIVE (See Figure 4)
The output can sink current continously with the Output
Duration Timer ON and the OSCILLATOR input active.
This output can sink current from a relay coil returned to
a positive voltage (VDD to 12.5V maximum).
TABLE 1
OUTPUT DURATION TIMER AS A FUNCTION OF TIMER CONTROL INPUT VOLTAGE
(f = Frequency at AC input or OSCILLATOR input)
INPUT VOLTAGE
0
0.09 VDD
0.16 VDD
0.22 VDD
0.28 VDD
0.34 VDD
0.41 VDD
0.47 VDD
0.53 VDD
0.59 VDD
0.66 VDD
0.72 VDD
0.78 VDD
0.84 VDD
0.91 VDD
VDD
f = 30Hz
30
60
90
120
4
6
8
10
12
14
16
18
20
24
28
30
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 or OSCILLATOR input)
INPUT STATE
0
OPEN
1
f = 30Hz
2
8
16
f = 50Hz
1.2
4.8
9.6
f = 60Hz
1
4
8
UNIT
sec
sec
sec
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LSI LS6522
ABSOLUTE MAXIMUM RATINGS:
PARAMETER
SYMBOL
VALUE
UNIT
DC supply voltage
Any input voltage
Operating temperature
Storage temperature
VDD - VSS
VIN
TA
TSTG
+10
VSS - 0.3 to VDD + 0.3
-40 to +85
-65 to +150
ELECTRICAL CHARACTERISTICS:
( All voltages referenced to VSS, TA = -40˚C to +55˚C, 7V VDD 9V, unless otherwise specified.)
V
V
°C
°C
PARAMETER
SUPPLY CURRENT:
VDD = 8V
VDD = 7V - 9V
REGULATOR:
Voltage
Current
SYMBOL
IDD
IDD
VR
IR
MIN
-
-
4.0
-
TYP
250
300
-
-
MAX
350
420
5.5
200
UNIT
μA
μA
V
μA
CONDITIONS
TRIAC/RELAY,
LED and REGULATOR
outputs not loaded
-
-
DIFFERENTIAL AMPLIFIERS:
Open Loop Gain, Each Stage
G
70
-
- dB -
Common Mode Rejection Ratio
CMRR
60
-
- dB -
Power Supply Rejection Ratio
PSRR
60
-
- dB -
Output Drive Current
ID -
- 25 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
Bandpass configuration
as shown in Figure 3
Input Dynamic Range
-0
- 2.5 V -
Diff. Amp 2 Internal
Reference
COMPARATOR:
Lower Reference
Higher Reference
VIR
VTHL
VTHH
-
-
-
0.4VR
0.3VR
0.5VR
-
-
-
V-
V-
V-
DIGITAL FILTER:
Input Pulse Width
(for recognition)
INHIBIT INPUT:
Inhibit Threshold
Enable Threshold
OSCILLATOR:
Resistor
Capacitor
Resistor
Capacitor
TPW
TPW
VTHI
VTHE
RO
CO
RO
CO
66.3
79.6
-
-
-
-
-
-
-
-
0.5VDD
0.45VDD
2.2
0.01
4.3
0.01
-
-
-
-
-
-
-
-
ms 60Hz operation
ms 50Hz operation
V-
V-
MΩ 60Hz Oscillator
μF Frequency
MΩ 30Hz Oscillator
μF Frequency
6522-110712-3







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