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SI4745 Datasheet(PDF) 6 Page - Silicon Laboratories |
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SI4745 Datasheet(HTML) 6 Page - Silicon Laboratories |
6 / 20 page AN400 6 Rev. 0.5 2.3. Si474x 4x4 mm Bill of Materials The required bill of materials for Figure 1 is shown in Table 2. The optional bill of materials for Figure 1 is shown in Table 3. Table 2. Required Bill of Materials Designator Description Note C1 VDD Supply bypass capacitor, 22 nF, 10%, Z5U/X7R C2 Shunt cap from DFS to gnd to prevent deg- radation of audio quality, 2 pF, COG, ±0.25 pF For digital audio output (Si4741/43/45 only) R11 DFS current limiting resistor, 25 to 2 k For digital audio output (Si4741/43/45 only) R15 DCLK current limiting resistor, 25 to 2 k For digital audio output (Si4741/43/45 only) R16 DOUT current limiting resistor, 604 For digital audio output (Si4741/43/45 only) U1 Silicon Laboratories Si474x, 4 x 4 mm, 24-pin, QFN Table 3. Optional Bill of Materials Designator Description Note C6, C19 VDD and VIO Supply bypass capacitors, 0.1 µF, 10%, X7R/X5R For supply noise mitigation C13 VIO Supply bypass capacitor, 22 nF, 10%, X7R/X5R For supply noise mitigation C17, C18 VIO and VDD Supply bypass capacitors, 100 µF, 10%, X7R/X5R For supply noise mitigation C8, C9 AC coupling capacitor, 0.39 µF, X7R/X5R For analog audio output R12, R14, R21, R24, R26, R29, R30 Current limiting resistor, 25 to 2 k For digital system noise mitigation R27, R28 Pull-up resistor, 22 k For I2C bus mode communication R17, R20 Pull-up resistor, 22 k For control bus communication R22, R23 Pull-up/Pull-down resistors, 4.02 k For reducing energy in RCLK harmonics R2 Pull-up resistor, 24.3 k For reducing energy in DFS harmonics R13 Pull-down resistor, 4.53 k For reducing energy in DFS harmonics |
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