GENERAL DESCRIPTION

The AD8385 provides a fast, 10-bit, latched decimating digital input that drives 12 high voltage outputs. 10-bit input words are loaded into 12 separate high speed, bipolar DACs sequentially. Flexible digital input format allows several AD8385s to be used in parallel in high resolution displays. The output signal can be adjusted for dc reference, signal inversion, and contrast for maximum flexibility. Integrated level shifters convert timing signals from a 3 V timing controller to high voltage for LCD panel timing inputs. Two, serial, 8-bit DACs are integrated to provide dc reference signals. A 3-wire serial interface controls overload protection, output mode, and the serial DACs.

FEATURES

High voltage drive to within 1.3 V of supply rails

Output short-circuit protection

High update rates

Fast, 100 Ms/s 10-bit input data update rate

Static power dissipation: 1.84 W

Voltage controlled video reference (brightness), offset,

and full-scale (contrast) output levels

INV bit reverses polarity of video signal

3.3 V logic, 9 V to 18 V analog supplies

Level shifters for panel timing signals

High accuracy voltage outputs

Laser trimming eliminates the need for adjustments or

calibration

Flexible logic

STSQ/XFR allow parallel AD8385 operation

Fast settling into capacitive loads

30 ns settling time to 0.25 into 150 pF load

Slew rate 460 V/µs

Available in 100-lead 14 mm × 14 mm TQFP E-pad