REV. B

a

AD8381

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Fast, High Voltage Drive, 6-Channel Output

FUNCTIONAL BLOCK DIAGRAM

DB (0:9)

VID0

VID1

VID2

VID3

VID4

2-STAGE

LATCH

XFR

VID5

DAC

10

10

10

10

10

10

10

10

10

10

10

10

DAC

2-STAGE

LATCH

2-STAGE

LATCH

2-STAGE

LATCH

2-STAGE

LATCH

2-STAGE

LATCH

DAC

10

SEQUENCE

CONTROL

DAC

DAC

DAC

BIAS

SCALING

CONTROL

VREFHI

VREFLO

INV

VMID

STBY

BYP

CLK

STSQ

E/O

R/L

AD8381

FEATURES

High Voltage Drive:

Rated Settling Time to within 1.3 V of Supply Rails

Output Overload Protection

High Update Rates:

Fast, 100 Ms/s 10-Bit Input Word Rate

Low Power Dissipation: 570 mW

Includes STBY Function

Voltage Controlled Video Reference (Brightness) and

Full-Scale (Contrast) Output Levels

3.3 V or 5 V Logic and 9 V to 18 V Analog Supplies

High Accuracy:

Laser Trimming Eliminates External Calibration

Flexible Logic:

INV Reverses Polarity of Video Signal

STSQ/XFR for Parallel AD8381 Operation in

12-Channel Systems

Drives Capacitive Loads:

27 ns Settling Time to 1% into 150 pF Load

Slew Rate 265 V/ s with 150 pF Load

Available in 48-Lead LQFP

APPLICATIONS

LCD Analog Column Driver

PRODUCT DESCRIPTION

The AD8381 provides a fast, 10-bit latched decimating digital

input, which drives six high voltage outputs. Ten-bit input

words are sequentially loaded into six separate high speed, bipolar

DACs. Flexible digital input format allows several AD8381s to be

used in parallel for higher resolution displays. STSQ synchronizes

sequential input loading, XFR controls synchronous output

updating and R/L controls the direction of loading as either

left-to-right or right-to-left. Six channels of high voltage

output drivers drive to within 1.3 V of the rail in rated settling

time. The output signal can be adjusted for brightness, signal

inversion, and contrast for maximum flexibility.

The AD8381 is fabricated on ADI’s proprietary, fast bipolar

24 V process, providing fast input logic, bipolar DACs with

trimmed accuracy and fast settling, high voltage precision drive

amplifiers on the same chip.

The AD8381 dissipates 570 mW nominal static power. The

STBY pin reduces power to a minimum, with fast recovery.

The AD8381 is offered in a 48-lead 7 mm

¥ 7 mm ¥ 1.4 mm

LQFP package and operates over the commercial temperature

range of 0

∞C to 85∞C.