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LS6511 データシート(PDF) 1 Page - LSI Computer Systems |
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LS6511 データシート(HTML) 1 Page - LSI Computer Systems |
1 / 4 page FEATURES: • Direct Interface with PIR Sensor • Two-Stage Differential Amplifier • Amplifier Gain and Bandwidth externally controlled • True and Complementary Output Drives • Separate digital filters for processing positive and negative input signals • Single Pulse/Dual Pulse/ Concurrent Pulse Detection • Adjustable Output Pulse Width • Optional 5V Shunt Regulator Output • 50µA Typical Supply Current • Undervoltage Detection • LS6511(DIP); LS6511-S (SOIC) - See Figure 1 APPLICATIONS: Security system intrusion detection, automatic doors, motion triggered events such as remote animal photography. DESCRIPTION (See Figure 5) The LS6511 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. Signal levels as low as 100µV can be detected. 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 2 outputs of the Window Comparator. One output detects positive input signals while the other output detects negative input signals. COMPARATOR DIGITAL FILTER The outputs of the Window Comparator are filtered so that motion must be present for a certain duration before it can be recognized and appear as pulses at the Digital Filter outputs. An external RC network sets the duration time. Nominal duration is 50ms. MODE SELECT A tristate input pin selects how the detected signals are processed. Single Pulse (SP) Mode is when detection from either a positive or negative input signal at the Digital Filter outputs will cause an LED/RELAY output to occur. Concurrent Pulse (CP) Mode is when detection from a positive and negative input signal must occur within a specific time before an output will occur. Dual Pulse (DP) mode is when any two detections within a specific time will cause an output to occur. SP Mode = 0; CP Mode = Open; DP Mode = 1. PIR SENSOR INTERFACE September 2006 6511-090606-1 PROGRAMMABLE RETRIGGERABLE ONE-SHOTS Positive and negative input signals at the digital filter outputs will generate retriggerable one-shot pulses. In the Concurrent Pulse Mode, outputs from each one-shot must occur together at some point in time to cause an output to occur. The one-shot pulse width is programmable using an external RC network. Typical pulse widths used vary between 1 and 12 seconds. WINDOW TIMER In the Dual Pulse Mode any two detections must occur within a timing window to cause an output to occur. The timing window is programmable using an external RC network. Typical windows are between 1 and 5 seconds. OUTPUT DURATION TIMER The duration timer is retriggerable and programmable using an external RC network. Typical duration times are between 0.5 and 15 seconds. Successive input detections will restart the timer. OUTPUTS The LED/RELAY Output is an open drain output that will sink current when an input signal is detected and processed and when the Power Supply drops below 3.7V (Typical) (Under- voltage Detection). The Undervoltage Detection will be removed when the Power Supply rises above 3.9V (Typical). The LED/ RELAY Output performs identically but is opposite in polarity. The output can sink current from a relay coil returned to a positive voltage (VDD to 9.5V maximum). SHUNT REGULATOR The LS6511 includes a 5V Shunt Regulator Output which can be tied to the VDD Pin so that the circuit can be powered from a higher voltage power supply. Note: See Figures 2, 3 and 4 for application schematics. LSI/CSI LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405 LS6511 UL ® A3800 1 2 3 4 5 6 7 8 9 10 11 12 13 14 DIFF. AMP. 2 INPUT (- ) DIFF. AMP. 2 OUTPUT CP MODE / DP MODE RC DIGITAL FILTER RC VDD DIFF. AMP 1 INPUT (-) DIFF. AMP 1 INPUT (+) 5V REGULATOR OUTPUT MODE SELECT DURATION TIMER RC LED/RELAY OUTPUT PIN ASSIGNMENT - TOP VIEW FIGURE 1 DIFF. AMP. 1 OUTPUT VSS LED/RELAY OUTPUT (+V) (- V) |
同様の部品番号 - LS6511_06 |
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同様の説明 - LS6511_06 |
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