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PKD01 Datasheet(PDF) 17 Page - Analog Devices |
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PKD01 Datasheet(HTML) 17 Page - Analog Devices |
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17 / 18 page ![]() REV. A PKD01 –17– PKD01 A B C LOGIC GND ANALOG GND –15V +15V VOUT 5V 1ms 2V INPUT RESET OUTPUT PEAK DETECT NOTES: RESET VOLTAGE = –1.0V TRACE 1 = 2V/DIV TRACE 2 = 5V/DIV TRACE 3 = 2V/DIV SW-201 –15V +15V VRS1 VRS2 VRS3 VRS4 VIN A1 A2 A3 A4 PK DET/RST Figure 21. Positive Peak Detector with Selectable Reset Voltage PKD01 D1 CH DAC08 C A B DET RAMP START PULSE BUFFERED RAMP OUTPUT RAMP SLOPE SELECTION I B1 B8 R > 20k REF-01 15V A0 A1 A2 CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 MUX-08 AMPLITUDE SELECTION LOGIC RAMP AMPLITUDE SLOPE = I0 C ~0.5V/ s ~0.5V/ s SLOPE = I1 C RAMP AMPLITUDE RAMP START PULSE 0 NOTES: 1. NEGATIVE SLOPE OF RAMP IS SET BY DAC08 OUTPUT CURRENT. 2. DAC08 IS A DIGITALLY CONTROLLED CURRENT GENERATOR. THE MAXIMUM FULL-SCALE CURRENT MUST BE LESS THAN 0.5mA. RST Figure 22. Programmable Low Frequency Ramp Generator |
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