AD2428W datasheet(16/38 Pages) AD

Part #	AD2428W

Description	Automotive Audio Bus A2B Transceiver

PDF	38 Pages

Scroll/Zoom	100%

Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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16 / 38 page

Rev. B

Page 16 of 38

January 2020

AD2420(W)/AD2426(W)/AD2427(W)/AD2428(W)/AD2429(W)

POWER-UP SEQUENCING RESTRICTIONS

When externally supplied, VDVDD and VIOVDD must reach at least

90% of specification before VVIN begins ramping. To avoid dam-

age to input pins and to ensure correct sampling of the

ADR1/ADR2 pins at start-up, VIOVDD must be within specifica-

tion before input signals are driven by external devices.

Table 8. Power-Up Timing

Parameter

Min

Max

Unit

Timing Requirements

tVIN

When Externally Supplied, VDVDD and VIOVDD Must Reach 90% of Specification

Before VVIN Begins Ramping

tPORST

Minimum Time Required for VVIN to be Held Below VRST to Assert Power on Reset 25

Figure 13. Power-Up Sequencing Timing with Externally Supplied VDVDD and VIOVDD

VDVDD

| VIOVDD

VVIN

tVIN

tPORST

VRST

MIN

VRSTN

MAX

AD2428W Datasheet(PDF) 16 Page - Analog Devices