High Performance, 12-Bit, 12-Channel
Decimating, LCD DecDriver®
AD8387
FUNCTIONAL BLOCK DIAGRAM
FEATURES
High accuracy, high-resolution voltage outputs
1 mV channel matching
12-bit input resolution
12
12
12
TWO-STAGE
LATCH
DAC
DAC
VID0
VID1
DBA(0:11)
DBB(0:11)
12
12
12
TWO-STAGE
LATCH
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
BIAS
BYP
TSW
THERMAL
SWITCH
12
12
12
TWO-STAGE
LATCH
DAC
DAC
VID10
VID11
G-MODE
SWITCH
GSW
DSW
Fast, 110 MHz clock
12
TWO-STAGE
LATCH
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
CLK
XFR
R/L
SEQUENCE
CONTROL
SCALING
CONTROL
AD8387
INV ISW
VRH VRL
Figure 1.
APPLICATIONS
LCD microdisplay driver
GENERAL DESCRIPTION
5
4
3
2
1
0
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.
NORMAL PROJECTOR OPERATING
TEMPERATURE RANGE
CODE 0
CODE 2048
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.
CODE 4095
0
10
20
30
40
50
60
70
80
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.
INTERNAL AMBIENT TEMPERATURE (°C)
Figure 2. Channel Matching vs. Temperature
Rev. 0
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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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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