Datasheet AD2420(W), AD2426(W), AD2427(W), AD2428(W), AD2429(W) (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | Automotive Audio Bus A2B Transceiver |
| Pages / Page | 38 / 2 — AD2420(W). AD2426(W). AD2427(W). AD2428(W). AD2429(W). TABLE OF CONTENTS. … |
| Revision | B |
| File Format / Size | PDF / 2.1 Mb |
| Document Language | English |
AD2420(W). AD2426(W). AD2427(W). AD2428(W). AD2429(W). TABLE OF CONTENTS. REVISION HISTORY. 1/2020—Rev. A to Rev. B
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AD2420(W) / AD2426(W) / AD2427(W) / AD2428(W) / AD2429(W) TABLE OF CONTENTS
A2B Bus Features . 1 Test Circuits and Switching Characteristics . 21 A2B Transceiver Features . 1 Output Drive Currents . 21 Applications . 1 Test Conditions . 22 Table of Contents . 2 Pin Configuration and Function Descriptions . 24 Revision History . 2 Power Analysis . 28 General Description . 3 Current Flow . 28 A2B Bus Details . 4 VREG1 and VREG2 Output Currents . 29 I2C Interface . 5 Current at VIN (IVIN) . 30 I2S/TDM Interface . 5 Power Dissipation . 30 Pulse Density Modulation (PDM) Interface . 6 Resistance Between Nodes . 30 GPIO Over Distance . 6 Voltage Regulator Current in Master Node or Local Mailboxes . 6 Powered Slave Node . 31 Data Slot Exchange Between Slaves . 6 Power Dissipation of A2B Bus . 31 Clock Sustain State . 6 Power Analysis of Bus Powered System . 31 Programmable Settings to Optimize EMC Supply Voltage . 31 Performance . 6 Reducing Power Consumption . 32 Specifications . 8 Power Estimation Example . 32 Operating Conditions . 8 Thermal Power . 35 Electrical Characteristics . 9 Designer Reference . 36 Power Supply Rejection Ratio (PSRR) . 11 VSENSE and Considerations for Diodes . 36 Timing Specifications . 12 Optional Add On Circuits . 36 Power-Up Sequencing Restrictions . 16 Layout Guidelines . 37 A2B Bus System Specification . 17 Outline Dimensions . 39 PDM Typical Performance Characteristics . 18 Automotive Products . 40 Absolute Maximum Ratings . 20 Ordering Guide . 41 Thermal Characteristics . 20 ESD Caution . 21
REVISION HISTORY 1/2020—Rev. A to Rev. B
Updated All Products to Released Status . Throughout Deleted Product Status Table. 1 Changes to Automotive Products . 37 Changes to Ordering Guide . 38 Deleted Pending Products Table . 39 Rev. B | Page 2 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
AD2420(W) / AD2426(W) / AD2427(W) / AD2428(W) / AD2429(W) TABLE OF CONTENTS
A2B Bus Features . 1 Test Circuits and Switching Characteristics . 21 A2B Transceiver Features . 1 Output Drive Currents . 21 Applications . 1 Test Conditions . 22 Table of Contents . 2 Pin Configuration and Function Descriptions . 24 Revision History . 2 Power Analysis . 28 General Description . 3 Current Flow . 28 A2B Bus Details . 4 VREG1 and VREG2 Output Currents . 29 I2C Interface . 5 Current at VIN (IVIN) . 30 I2S/TDM Interface . 5 Power Dissipation . 30 Pulse Density Modulation (PDM) Interface . 6 Resistance Between Nodes . 30 GPIO Over Distance . 6 Voltage Regulator Current in Master Node or Local Mailboxes . 6 Powered Slave Node . 31 Data Slot Exchange Between Slaves . 6 Power Dissipation of A2B Bus . 31 Clock Sustain State . 6 Power Analysis of Bus Powered System . 31 Programmable Settings to Optimize EMC Supply Voltage . 31 Performance . 6 Reducing Power Consumption . 32 Specifications . 8 Power Estimation Example . 32 Operating Conditions . 8 Thermal Power . 35 Electrical Characteristics . 9 Designer Reference . 36 Power Supply Rejection Ratio (PSRR) . 11 VSENSE and Considerations for Diodes . 36 Timing Specifications . 12 Optional Add On Circuits . 36 Power-Up Sequencing Restrictions . 16 Layout Guidelines . 37 A2B Bus System Specification . 17 Outline Dimensions . 39 PDM Typical Performance Characteristics . 18 Automotive Products . 40 Absolute Maximum Ratings . 20 Ordering Guide . 41 Thermal Characteristics . 20 ESD Caution . 21
REVISION HISTORY 1/2020—Rev. A to Rev. B
Updated All Products to Released Status . Throughout Deleted Product Status Table. 1 Changes to Automotive Products . 37 Changes to Ordering Guide . 38 Deleted Pending Products Table . 39 Rev. B | Page 2 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
