PRELIMINARY
Phase Detector Polarity
Depending upon VCO characteristics, R16 bit should be
set accordingly:
When VCO characteristics are positive like (1), R16
should be set HIGH; When VCO characteristics are
negative like (2), R16 should be set LOW.
Serial Data Input Timing
&'& ,-.
,-.
()*
,(-.
,(-.
(+
)
(+
NOTES:
1. Parenthesis data indicates programmable reference divider data.
2. Data shifted into register on clock rising edge.
3. Data is shifted in MSB first.
Test Conditions: The Serial Data Input Timing is tested using a symmetrical waveform around VDD/2. The test waveform
has an edge rate of 0.6V/ns with amplitudes of 2.2V at VDD = 2.7V and 2.6V at VDD = 3.6V.
Phase Comparator and Internal Charge Pump Characteristics
"
"
(
"/"
"0"
"1"
"1"
"1"
NOTES:
1. Phase difference detection range: -2to +2
2. The minimum width pump up and pump down current pulse occur at the DO pin when the loop is locked.
3. R16 = HIGH