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LM139AJ Folha de dados(PDF) 10 Page - Texas Instruments |
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LM139AJ Folha de dados(HTML) 10 Page - Texas Instruments |
10 / 19 page 1OUT 1 1IN– 2 1IN+ 3 GND 4 VCC 7 2OUT 6 2IN– 5 2IN+ 0.1 F Ground Bypass Capacitor Negative Supply or Ground Positive Supply 0.1 F Ground Only needed for dual power supplies 14 13 12 11 8 9 10 3IN+ 3IN– 4IN+ 4IN– 3OUT 4OUT ±1 0 1 2 3 4 5 6 -0.25 0.25 0.75 1.25 1.75 2.25 Time (usec) 5mV OD 20mV OD 100mV OD C004 ±1 0 1 2 3 4 5 6 ±0.25 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 Time (usec) 5mV OD 20mV OD 100mV OD C006 10 LM139A-MIL SLCS161 – JUNE 2017 www.ti.com Product Folder Links: LM139A-MIL Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated 8.2.3 Application Curves Figure 8 and Figure 9 were generated with scope probe parasitic capacitance of 50 pF. VCC = 5 V VLogic = 5 V RPULLUP = 5.1 kΩ Figure 8. Response Time vs Output Voltage (Positive Transition) VCC = 5 V VLogic = 5 V RPULLUP = 5.1 kΩ Figure 9. Response Time vs Output Voltage (Negative Transition) 9 Power Supply Recommendations For fast response and comparison applications with noisy or AC inputs, use a bypass capacitor on the supply pin to reject any variation on the supply voltage. This variation can affect the common-mode range of the comparator input and create an inaccurate comparison. 10 Layout 10.1 Layout Guidelines To create an accurate comparator application without hysteresis, maintain a stable power supply with minimized noise and glitches, which can affect the high level input common-mode voltage range. To achieve this accuracy, add a bypass capacitor between the supply voltage and ground. Place a bypass capacitor on the positive power supply and negative supply (if available). NOTE If a negative supply is not being used, do not place a capacitor between the GND pin of the device and system ground. 10.2 Layout Example Figure 10. LMx39 Layout Example |
Nº de peça semelhante - LM139AJ |
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Descrição semelhante - LM139AJ |
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