High Performance, 12-Bit, 12-Channel

AD8387

Rev. 0

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FEATURES

High accuracy, high-resolution voltage outputs

1 mV channel matching

12-bit input resolution

Laser-trimmed outputs

Fast settling, high voltage drive

35 ns settling time to 0.25% into 150 pF load

Slew rate 420 V/μs

Outputs to within 1.3 V of supply rails

High update rates

Fast, 110 MHz clock

Programmable video reference (brightness) and

full-scale (contrast) output levels

Flexible logic

INV bit reverses polarity of video signal

R/L reverses loading order of data

ISW selects frame/row or column/dot inversion

DSW selects single or dual data bus mode

Output short-circuit protection

3.3 V logic, 11 V to 18 V analog supplies

Available in 80-lead, 12 mm × 12 mm, TQFP E-pad

APPLICATIONS

LCD microdisplay driver

FUNCTIONAL BLOCK DIAGRAM

DBA(0:11)

VID0

VID1

VID10

VID11

DBB(0:11)

BYP

TSW

GSW

DSW

CLK

XFR

R/L

VRL

VRH

ISW

INV

TWO-STAGE

LATCH

TWO-STAGE

LATCH

TWO-STAGE

LATCH

TWO-STAGE

LATCH

SCALING

CONTROL

DAC

DAC

DAC

DAC

SEQUENCE

CONTROL

THERMAL

SWITCH

BIAS

G-MODE

SWITCH

12

12

12

12

12

12

12

12

12

12

AD8387

Figure 1.

GENERAL DESCRIPTION

The AD8387 DecDriver provides dual, fast latched, 12-bit

decimating input, which drives 12 high voltage outputs. Twelve-

bit input words are loaded into 12 separate high speed, bipolar

DACs sequentially. Flexible digital input format allows more

than one AD8387 to be used in parallel for higher resolution

displays. The output signal can be adjusted for dc reference,

signal inversion, and contrast for maximum flexibility.

The AD8387 is fabricated on ADI’s fast bipolar, 26 V XFCB

process, providing fast input logic, bipolar DACs with trimmed

accuracy and fast settling, high voltage, precision drive

amplifiers on the same chip.

The AD8387 dissipates 1.34 W nominal static power. The

AD8387 is offered in an 80-lead TQFP E-pad package and

operates over the commercial temperature range of 0°C to

+85°C.

5

0

0

INTERNAL AMBIENT TEMPERATURE (

°C)

4

3

2

1

10

20

30

40

50

60

70

80

NORMAL PROJECTOR OPERATING

TEMPERATURE RANGE

CODE 4095

CODE 0

CODE 2048

Figure 2. Channel Matching vs. Temperature