applications such as personal communications and data acquisition. This device also has a page write capability of
up to 128 bytes of data. This device is capable of both random and sequential reads up to the 512K boundary.
Functional address lines allow up to eight devices on the same bus, for up to 4 Mbit address space. This device is
available in the standard 8-pin plastic DIP, SOIJ and DFN packages.
AD2428 - Automotive Audio Bus A
2
B Transceiver
The Automotive Audio Bus (A
2
B
®
) provides a multichannel, I2S/TDM link over distances of up to 15 m between
nodes. It embeds bidirectional synchronous pulse-code modulation (PCM) data (for example, digital audio), clock,
and synchronization signals onto a single differential wire pair. A
2
B supports a direct point to point connection and
allows multiple, daisy-chained nodes at different locations to contribute and/or consume time division multiplexed
channel content.
A
2
B is a single-master, multiple-slave system where the transceiver chip at the host controller is the master. The mas-
ter generates clock, synchronization, and framing for all slave nodes. The master A
2
B chip is programmable over a
control bus (I
2
C) for configuration and read back. An extension of this control bus is embedded in the A
2
B data
stream, which grants direct access of registers and status information on slave transceivers as well as I
2
C to I
2
C com-
munication over distance.
The transceiver can connect directly to general-purpose digital signal processors (DSPs), field-programmable gate
arrays (FPGAs), application specific integrated circuits (ASICs), microphones, analog-to-digital converters (ADCs),
digital-toanalog converters (DACs), and codecs through a multichannel I
2
S/TDM interface. It also provides a pulse
density modulation (PDM) interface for direct connection of up to four PDM digital microphones.
Finally, the transceiver also supports an A
2
B bus powering feature, where the master node supplies voltage and cur-
rent to the slave nodes over the same daisy-chained, twisted pair wire cable as used for the communication link.
LT8620 - 65V, 2A Synchronous Step-Down Regulator with 2.5
μ
A
Quiescent Current
The LT8620 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that
accepts a wide input voltage range up to 65V, and consumes only 2.5μA of quiescent current. Top and bottom pow-
er switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst
Mode operation enables high efficiency down to very low output currents while keeping the output ripple below
10mV
P-P
. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode
topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV
pin has an accurate 1V threshold and can be used to program V
IN
undervoltage lockout or to shut down the
LT8620 reducing the input supply current to 1μA. A capacitor on the TR/SS pin programs the output voltage ramp
rate during start-up. The PG flag signals when V
OUT
is within ±9% of the programmed output voltage as well as
fault conditions. The LT8620 is available in small 16-Lead MSOP and 3mm × 5mm QFN packages with exposed
pads for low thermal resistance.
AD2428 - Automotive Audio Bus A
2
B Transceiver
ADZS-AD2428MINI Manual
2–3
Содержание ADZS-AD2428MINI
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