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PHASE-FREQUENCY DETECTOR
—TOP VIEW—
REF IN 1
w
w
aD1 D . w VAR
S a t
e e h
2 3
U 4 t
.c
om
INPUT AI PD PU REF VAR
UPC1008C IL08
VCC 14 13 U1 OUT 12 U2 OUT 11 PD IN 10 DF OUT 9 AI 8 AO
OUT
IN
: : : : :
FILTER AMP CHARGE PUMP DOWN CHARGE PUMP UP REFERENCE VARIABLE
PU IN 4 UF OUT 5 D2 OUT 6 7 GND
OUTPUT AO : D1, D2 : DF : U1, U2 : UF :
FILTER AMP DOWN CHARGE PUMP DOWN UP CHARGE PUMP UP
PHASE FREQ. DET-1 FALLING EDGE SENSING TYPE INPUTS fV = fR ØV = ØR fV < fR ØV lags ØR fV > fR ØV leads ØR OUTPUTS U1 D1 1 0 1 1 1 0
REF VAR
1 3
PHASE FREQ. DET-2 FOR 50% DUTY CYCLES INPUTS OUTPUTS REF VAR U2 D2 0 0 1 1 0 1 1 1 1 0 0 1 1 1 1 0
w
w
w
t a .D
S a
PU PD AI
e h
U 4 t e
PHASEFREQ. DET-1 PHASEFREQ. DET-2 CHARGE PUMP
.
UPC1008C Datasheet