AD8384ASVZ datasheet(17/24 Pages) AD

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AD8384

Rev. 0 | Page 17 of 24

APPLICATIONS

IMAGE

PROCESSOR

1/3 AD8389

CLK

DXI, CLXI,

ENBX(1–4)I

DXxO, CLXxO,

ENBX(1–4)xO

MONITxI

µP

AD8384

VID(0:5)

DB(0:5)

STSQ, XFR,

CLK, R/L, INV

DIRX, DIRY,

DY, CLY,

CLYN, NRG

DIRXIN, DIRYIN,

DYIN, CLYIN,

NRGIN

MONITI

MONITO

DX,

CLX, CLXN,

ENBX (1–4)

DXIN,

CLXIN,

ENBXIN (1–4)

SDI

SCL

SEN

VAO1

VAO2

VRH, VRL,

V1, V2,

SVRH, SVRL

DC REFERENCE

VOLTAGES

MONITOR

VCOM

LCD TIMING

CONTROLS

LCD TIMING

CONTROLS

6-CHANNEL LCD

CHANNEL 0–5

Figure 16. Typical Applications Circuit

POWER SUPPLY SEQUENCING

As indicated under the Absolute Maximum Ratings, the voltage

at any input pin cannot exceed its supply voltage by more than

0.5 V. To ensure compliance with the Absolute Maximum

Ratings, the following power-up and power-down sequencing is

recommended.

During power-up, initial application of nonzero voltages to any

of the input pins must be delayed until the supply voltage ramps

up to at least the highest maximum operational input voltage.

During power-down, the voltage at any input pin must reach

zero during a period not exceeding the hold-up time of the

power supply.

Power ON

Sequence the applied voltages starting with the highest and

proceeding toward the lowest. Apply AVCC and then proceed

with applying the voltages in a decreasing order, for example

VRH, V2, and so on. Apply DVCC last.

Power OFF

Remove voltages starting with the lowest and proceed toward

the highest. Remove DVCC and then proceed with the voltages

in an increasing order, for example V1, V2, VRH, and so on.

Remove AVCC last.

Failure to comply with the Absolute Maximum Ratings may

result in functional failure or damage to the internal ESD

diodes. Damaged ESD diodes may cause temporary parametric

failures, which may result in image artifacts. Damaged ESD

diodes cannot provide full ESD protection, reducing reliability.

To Ensure Grounded Output Mode at Power-Off

If references are active sources:

Program Grounded Output mode

Turn off references

Turn off AVCC

Turn off DVCC

If references are passive voltage dividers dependent on AVCC:

Program Grounded Output mode

Set AVCC to 5 V

Hold for 1 ms

Turn off DVCC

Turn off AVCC

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