AD8389_15 Datasheet, PDF (1/12 Pages) Analog Devices – Triple, 6-Channel LCD Timing Delay-Locked Loop

Triple, 6-Channel LCD Timing
Delay-Locked Loop
AD8389
PRODUCT FEATURES
High speed
Up to 85 MHz clock rate
Triple (R, G, B) output
Matched delay lines
Low power dissipation: 40 mW
Reference to rising or falling edge of MONITI input
Selectable loop delay
Available in 48-lead 7 mm × 7 mm LFCSP
APPLICATIONS
LCD microdisplay horizontal timing
PRODUCT DESCRIPTION
The AD8389 is a triple 6-channel LCD microdisplay delay-
locked timing loop. As part of a closed-loop system, the AD8389
maintains a constant delay between the common input, DXI,
and each independent feedback reference, MONITxI.
The AD8389 consists of a selectable fixed delay element, a phase
detector, a charge pump, and six matched variable delay lines
per color. The phase detector, charge pump, and master delay
line form a closed loop when connected to a compatible LCD
microdisplay. Five additional delay lines track the master for a
complete set of matched timing signals.
The AD8389 dissipates 40 mW nominal power. The AD8389 is
offered in a 48-lead 7 mm × 7 mm LFCSP package and operates
over the commercial temperature range of 0°C to 85°C.
COMPEDGE
SLOW
DXI
ENBX1I
ENBX2I
ENBX3I
ENBX4I
CLXI
CLK
FUNCTIONAL BLOCK DIAGRAM
AVDD(4) AVSS(4)
DRVDD(2) DRVSS(2)
SELECTABLE
DELAY
PHASE
DETECTOR
CHARGE
PUMP
AD8389
MATCHED VARIABLE
DELAY LINES (6-CHANNEL)
6_/
6_/
PHASE
DETECTOR
CHARGE
PUMP
MATCHED VARIABLE
DELAY LINES (6-CHANNEL)
6_/
PHASE
DETECTOR
CHARGE
PUMP
INTERNAL
TIMING
MATCHED VARIABLE
DELAY LINES (6-CHANNEL)
6_/
VCONTR
MONITRI
DXRO
ENBX1RO
ENBX2RO
ENBX3RO
ENBX4RO
CLXRO
VCONTG
MONITGI
DXGO
ENBX1GO
ENBX2GO
ENBX3GO
ENBX4GO
CLXGO
VCONTB
MONITBI
DXBO
ENBX1BO
ENBX2BO
ENBX3BO
ENBX4BO
CLXBO
Figure 1.
Rev. 0
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