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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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ADS1601IPFBT Datenblatt(PDF) 21 Page - Texas Instruments |
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ADS1601IPFBT Datenblatt(HTML) 21 Page - Texas Instruments |
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21 / 31 page  C P C P C P C P C P C P C P C P 1 36 DGND 2 3 9 10 11 12 18 42 41 55 38 37 34 33 19 22 23 AVDD AVDD AGND AGND C P 6 7 AVDD AGND AGND AVDD 47 F m 47 F m 47 F m 4.7 F m 1 F m 0.1 F m 0.1 F m 0.1 F m 1 F m 1 F m 4.7 F m 4.7 F m 15 10kW ADS1601 Ifusingseparateanalogand digitalgroundplanes,connect togetherontheADS1601PCB. DGND NOTE:C = P 1 F m úú m 0.1 F AGND AVDD IOVDD DVDD ADS1601 www.ti.com SBAS322D – DECEMBER 2004 – REVISED OCTOBER 2011 POWER DOWN (PD) POWER SUPPLIES When not in use, the ADS1601 can be powered down Three supplies are used on the ADS1601: analog by taking the PD pin low. All circuitry is shut down, (AVDD), digital (DVDD) and digital I/O (IOVDD). Each including the voltage reference. To minimize the supply must be suitably bypassed to achieve the best digital current during power down, stop the clock performance. It is recommended that a 1 μF and signal supplied to the CLK input. There is an internal 0.1 μF ceramic capacitor be placed as close to each pull-up resistor of 170k Ω on the PD pin, but it is supply pin as possible. Connect each supply-pin recommended that this pin be connected to IOVDD if bypass capacitor to the associated ground, as shown not used. Make sure to allow time for the reference to in Figure 50. Each main supply bus should also be start up after exiting power-down mode. The internal bypassed with a bank of capacitors from 47 μF to reference typically requires 15ms. After the reference 0.1 μF, as shown. The I/O and digital supplies (IOVDD has stabilized, allow at least 100 conversions for the and DVDD) can be connected together when using modulator and digital filter to settle before retrieving the same voltage. In this case, only one bank of 47 μF data. to 0.1 μF capacitors is needed on the main supply bus, though each supply pin must still be bypassed with a 1 μF and 0.1μF ceramic capacitor. Figure 50. Recommended Power-Supply Bypassing Copyright © 2004–2011, Texas Instruments Incorporated 21 |
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