LS6505 (Prelimin)

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