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LS6513 Datasheet(PDF) 4 Page - LSI Computer Systems |
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LS6513 Datasheet(HTML) 4 Page - LSI Computer Systems |
4 / 5 page FIGURE 2. TYPICAL RELAY APPLICATION R1 = See NOTE 2 R2 = 36kΩ R3 = 1.5MΩ R4 = 36kΩ R5 = 1.5MΩ R6 = 2.2MΩ (Typical) R7 = 2.2MΩ (Typical) R8 = 2.2MΩ (Typical) R9 = 36kΩ R10 = 2.2kΩ (Typical) NOTE 1: The relay coil is normally energized and the LED is off. When an alarm occurs, the relay coil becomes de-energized and the LED is turned on. Using the typical application circuit as shown in Figure 2, the Outputs on Pins 8 and 9 occur on power-up because of the large settling time in the amplifier stages. In applications where this is not desireable, the digital filter oscillator must be disabled on power-up long enough to enable the PIR amplifiers to stabilize. Replacing the R6-C6 circuit shown in Figure 2 with the circuit shown in Figure 3 will disable the digital filter oscillator until the voltage across the 220µF capacitor reaches a value high enough for the oscillator to begin oscillating. Component values that can be changed to speed up stabilization include C2, C3, C4 and C5. C3 and C5 become 0.001µF and C2 and C4 become 10µF. FIGURE 3. INHIBITING OUTPUTS UPON POWER TURN-ON 6511N-061509-4 NOISE CONSIDERATIONS Layout of any circuit using a high-gain PIR amplifier is critical. The PIR amplifier components should be located close to the amplifier pins on the chip in order to minimize noise pickup.The oscillator and relay drive components should be located away from the amplifier components. Other steps that can help reduce noise is adding a ground shield backplane to the PCB and enhancing the filtering of VDD; i.e., adding a 0.1uF high frequency capacitor across C1 and increasing C1 to 220 µF. PIR = Perkin-Elmer LHi 958, 978 (Typical) Nicera RE200B, SDA02-54 (Typical) All Resistors 1/4W. All Capacitors 10V. NOTE 2: R1 is selected to provide sufficient current to drive the LS6511N and PIR Sensor. Any surplus current is available to drive additional loads applied to the 5V Shunt Regulator output or is absorbed by the 5V Shunt Regulator. Refer to specifications for current limits. NOTE 3: In SP Mode, R7 and C7 are not used and Pin 5 is tied to Vss. NOTE 4: Adjust the value of R9 if the selected PIR Sensor causes the input static voltage at Pin 13 to be out of the Input Dynamic Range of 0V to 1.75V. ( See Electrical Characteristics on Page 2) NOTE 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. NOTE 6: Pins shown in parentheses and connections shown by broken lines are for LS6513 only. C1 = 100µF C2 = 10µF C3 = 0.003µF C4 = 10µF C5 = 0.003µF D1 = 1N4001 C6 = 0.01µF (Typical) C7 = 0.22µF (CP Mode; Typical) C7 = 0.68µF (DPMode; Typical) C8 = 0.22µF (Typical) C9 = 0.1µF C10 = 0.1µF Relay = No typical P/N AMP 1 OUT AMP 1 (-) IN AMP 2 (-) IN AMP 1 (+) IN AMP 2 OUT 5V REG OUT CP MODE or DP MODE RC VSS LED / REL OUT VDD VDD C4 R4 C5 R5 1 2 3 4 5 6 7 9 (11) 10 (12) 11 (13) 12 (14) 13 (15) 14 (16) C2 R2 R9 C9 R1 C1 PIR SENSOR R3 C3 LS6511N/LS6512 ( LS6513 ) C6 R6 + - + - + - 8 (10) VDD C7 R7 VDD C8 R8 V DD D1 LED / REL OUT MODE DIG FILTER RC DUR TIM RC RELAY COIL RAW DC INPUT R10 LED S = 3-Position SPDT ( On-Off-On ) S See Note 3 C10 + - VDD ENABLE ( 8) ( 9) SEL UDV IN LS6511N - 4 2.2M 0.01µF 220µF 220k VDD R6 C6 + - |
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Similar Description - LS6513 |
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