TLC2943 Datasheet, PDF (12/27 Pages) Texas Instruments – HIGH-PERFORMANCE DUAL PHASE-LOCKED BUILDING BLOCK

TLC2943
HIGH-PERFORMANCE DUAL PHASE-LOCKED BUILDING BLOCK
SLAS249 – NOVEMBER 1999
operating characteristics at V_DD = 3.3 V, T_A = 25°C (unless otherwise noted)
VCO section
PARAMETER
TEST CONDITIONS
MIN NOM MAX
f(OSC)
t(STB)
tr
tf
f(DUTY)
f(TA)
Oscillation frequency
Time to stable oscillation
Output rise time
Output fall time
Duty cycle
Temperature coefficient of oscillation
frequency
RBIAS = 2.4 kΩ ,
See Note 10
CL = 15 pF,
CL = 15 pF,
RBIAS = 2.4 kΩ ,
RBIAS = 2.4 kΩ ,
Top = –20°C to 75°C
VCOIN = 1/2VDD
See Figure 5
See Figure 5
VCOIN = 1/2VDD
VCOIN = 1/2VDD
42
45%
52
3
1.9
50%
62
10
8
7
55%
0.03
Supply voltage coefficient of oscillation
f(VDD) _{frequency supply}
RBIAS = 2.4 kΩ ,
VCOIN = 1.65 V,
VDD = 3.15 V to 3.45 V
0.04
NOTE 10: The time period to the stable VCO oscillation frequency after the VCO INHIBIT terminal is changed to a low level.
UNIT
MHz
µs
ns
ns
%/°C
%/mV
PFD section
fMAX
tPLZ
tPHZ
tPZL
tPZH
tr
tf
PARAMETER
Maximum operating frequency
PFD output disable time from low level
PFD output disable time from high level
PFD output enable time to low level
PFD output enable time to high level
Rise time
Fall time
TEST CONDITIONS
See Figure 6 and Figure 7, and Table 5
CL = 15 pF,
See Figure 6
MIN NOM MAX UNIT
30
MHz
20
40
ns
18
40
16
ns
16
8
ns
8
12
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