Datasheet AD2420(W), AD2426(W), AD2427(W), AD2428(W), AD2429(W) (Analog Devices) - 27

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AD2420(W) /AD2426(W) /AD2427(W) /AD2428(W) / AD2429(W) Table 15. AD2420(W)/AD2426(W)/AD2427(W)/AD2428(W)/AD2429(W) Pin Function Descriptions (Continued) Pin
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Alternate
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No. Pin Name Type Functions1 Description
29 VOUT2 PWR None Second Output of the On-Chip low Dropout Voltage Regulator. The voltage output on this pin provides a regulated supply to the TRXVDD supply pins. External devices also can be powered by this supply if the current consumption is within the specification. Decouple VOUT2 to VSS with a 4.7 μF capacitor. 30 VIN PWR None Power supply pin that accepts a wide input voltage range (see the VVIN specification in the Operating Conditions section) for an on-chip low dropout voltage regulator. 31 VSS PWR None Power Supply Pin for Return Currents. Connect the VSS pin to a low impedance local VSS ground plane. 32 VOUT1 PWR None First Output of the On-Chip Low Dropout Voltage Regulator. The voltage output on this pin provides a regulated supply to the DVDD and PLLVDD power supply pins. External devices can be powered by this supply if the current consumption is within the specification. Decouple VOUT1 to VSS with a 4.7 μF capacitor. 33 EPAD PWR None Power Supply Pin for Return Currents. See other VSS pin description in this table. This pin is the exposed pad on the bottom of the package and must be connected to GND. In this table, the Type is defined as follows: PWR = power/ground, A_IN = analog input, D_OUT = digital output, A_IO = analog input/output, D_IO = digital input/output, N/A = not applicable. 1 See the AD2420(W)/6(W)/7(W)/8(W)/9(W) Automotive Audio Bus A2B Transceiver Technical Reference for more information about configuring pins for alternate functions. 2 If the listed functions for this pin are not required, do not connect this pin. Rev. B | Page 27 of 38 | January 2020 Document Outline Automotive Audio Bus A2B Transceiver A2B Bus Features A2B Transceiver Features Applications Table of Contents Revision History General Description A2B Bus Details I2C Interface I2S/TDM Interface I2S Reduced Rate Pulse Density Modulation (PDM) Interface GPIO Over Distance Mailboxes Data Slot Exchange Between Slaves Clock Sustain State Programmable Settings to Optimize EMC Performance Programmable LVDS Transmit Levels Spread-Spectrum Clocking Unique ID Support for Crossover or Straight Through Cabling Data Only and Power Only Bus Operation Specifications Operating Conditions Electrical Characteristics Power Supply Rejection Ratio (PSRR) Timing Specifications Power-Up Sequencing Restrictions A2B Bus System Specification RMS Time Interval Error (TIE) Jitter PDM Typical Performance Characteristics Absolute Maximum Ratings Thermal Characteristics ESD Caution Test Circuits and Switching Characteristics Output Drive Currents Test Conditions Output Enable Time Measurement Output Disable Time Measurement Capacitive Loading Pin Configuration and Function Descriptions Power Analysis Current Flow Constant Current PLL Supply Current VIN Quiescent Current IOVDD Current Peripheral Supply Current Digital Logic Supply Current A2B Bus TX/RX Current LVDS Transmitter and Receiver Supply Currents Downstream/Upstream Activity Level LVDS Transmitter and Receiver Idle Current VREG1 and VREG2 Output Currents Current at VIN (IVIN) Power Dissipation Resistance Between Nodes Voltage Regulator Current in Master Node or Local Powered Slave Node Power Dissipation of A2B Bus Power Analysis of Bus Powered System Supply Voltage Reducing Power Consumption Power-Down Mode Standby Mode Control Mode Thermal Power Designer Reference VSENSE and Considerations for Diodes Optional Add On Circuits Layout Guidelines Outline Dimensions Automotive Products Ordering Guide