AD8384_15 Datasheet, PDF (1/24 Pages) Analog Devices – 10-Bit, 6-Channel Decimating

10-Bit, 6-Channel Decimating
LCD DecDriver^® with Level Shifters
AD8384
PRODUCT FEATURES
High accuracy, high resolution voltage outputs
10-bit input resolution
Laser trimmed outputs
Fast settling, high voltage drive
30 ns settling time to 0.25% into a 150 pF load
Slew rate 460 V/µs
Outputs to within 1.3 V of supply rails
High update rates
Fast, 100 Ms/s 10-bit input data update rate
Voltage controlled video reference (brightness), offset, and
full-scale (contrast) output levels
Flexible logic
STSQ/XFR allow parallel AD8384 operation
INV bit reverses polarity of video signal
Output short-circuit protection
3.3 V logic, 9 V to 18 V analog supplies
18 V level shifters for panel timing signals
Available in 80-lead 12 mm × 12 mm TQFP E-pad
APPLICATIONS
LCD analog column drivers
PRODUCT DESCRIPTION
The AD8384 DecDriver provides a fast, 10-bit, latched,
decimating digital input that drives six high voltage outputs.
10-bit input words are loaded sequentially into six separate high
speed, bipolar DACs. Flexible digital input format allows several
AD8384s 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 input, 8-bit
DACs are integrated to provide dc reference signals. DAC
addresses and 8-bit data are loaded in one 12-bit serial word.
FUNCTIONAL BLOCK DIAGRAM
BYP
BIAS
/ ^{VRH 2}
VRL
SCALING
CONTROL
/ ^{DB(0:9) 10}
2-STAGE
LATCH
DACs
R/L
/ ^{CLK 4}
STSQ
XFR
INV
V1
V2
SEQUENCE
CONTROL
INV
CONTROL
TSTM
SDI
SCL
SEN
3_/
SVRH
SVRL
2_/
12-BIT
SHIFT
REGISTER
DUAL
DAC
DYIN
DXIN
DIRYIN
DIRXIN
NRGIN
9_/
ENBX1IN
ENBX2IN
ENBX3IN
ENBX4IN
CLXIN
CLYIN
2_/
R
MONITI
S
Figure 1.
VID0
VID1
/6 VID2
VID3
VID4
VID5
VAO1
VAO2
DY
DX
DIRY
9_/
DIRX
NRG
ENBX1
ENBX2
ENBX3
ENBX4
2_/
CLX
CLY
2_/
CLXN
CLYN
MONITO
AD8384
The AD8384 is fabricated on the 26 V, fast, bipolar XFHV
process developed by Analog Devices, Inc. This process
provides fast input logic, bipolar DACs with trimmed accuracy
and fast settling, high voltage, precision drive amplifiers on the
same chip.
The AD8384 dissipates 1.1 W nominal static power.
The AD8384 is offered in an 80-lead 12 mm × 12 mm TQFP
E-pad package and operates over the 0°C to 85°C commercial
temperature range.
Rev. 0
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