REV. B

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

a

AD8380

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2001

Fast, High-Voltage Drive, 6-Channel Output

FUNCTIONAL BLOCK DIAGRAM

DAC

10

VID1

10

DAC

10

10

VID0

DAC

10

VID2

10

DAC

10

VID3

10

DAC

2-STAGE

LATCH

10

VID4

10

DAC

10

VID5

10

CHANNEL

SELECTOR

R/

L

2-STAGE

LATCH

2-STAGE

LATCH

2-STAGE

LATCH

2-STAGE

LATCH

2-STAGE

LATCH

10

BIAS

SCALING

CONTROL

DB [0:9]

CLK

STSQ/CS

XFR

E/

O

A[0:2]

STBY

BYP

VREFHI

VREFLO

INV

VMID

AD8380

3

FEATURES

High-Voltage Drive to Within 1.3 V of Supply Rails

24 V Supply for Fast Output Voltage Drivers

High Update Rates: Fast 75 Ms/s 10-Bit Input Word Rate

Low Power Dissipation, 550 mW with Power-Down

Voltage Controlled Video Reference and Full-Scale

(Contrast) Output Levels

INV Bit Reverses Polarity of Video Signal

Nominal 3.3 V Logic and 15 V Analog Supplies

Flexible Logic

Addressable or Sequential Channel Loading

STSQ/CS Allow Parallel AD8380 Operation for XGA

and Greater Resolution

Drives Capacitive Loads

26 ns Settling Time to 1% Up to 150 pF Load

Slew Rate 270 V/ s

Available in 44-Lead MQFP

APPLICATIONS

Poly Si LCD Panel Analog Column Driver

PRODUCT DESCRIPTION

The AD8380 provides a fast, 10-bit latched decimating digital

input that drives 6-channel high voltage drive outputs. The 10-

bit input word is sequentially muxed into six separate high speed,

bipolar DACs. Flexible digital input formats allow several

AD8380s to be used in parallel for higher resolution displays.

STSQ/CS, in conjunction with 3-bit addressable channel-loading

pins, allows loading of the digital words either sequentially or

randomly, and R/

L control sets loading as either left to right, or

vice versa. 6-channel high voltage output drivers drive to within

1.3 V of the rails to rated settling time. The output signal can be

adjusted for dc signal reference, signal inversion or contrast for

maximum flexibility.

The AD8380 is fabricated on ADI’s XFCB26 fast bipolar 26 V

process, providing fast input logic, trimmed accuracy bipolar

DACs and fast settling, high voltage precision drive amplifiers

on the same chip.

The AD8380 dissipates nominally 0.55 W of static power. STBY

pin reduces power to a minimum, with fast recovery.

The AD8380 is offered in a 44-lead 10

× 10 × 2.0 mm MQFP

package and operates over the commercial temperature range of

0

°C to 85°C.

DecDriver is a trademark of Analog Devices, Inc.