TLC2932_15 Datasheet, PDF (6/29 Pages) Texas Instruments – HIGH-PERFORMANCE PHASE-LOCKED LOOP

TLC2932
HIGH-PERFORMANCE PHASE-LOCKED LOOP
SLAS097E – SEPTEMBER 1994 – REVISED MAY 1997
operating characteristics over recommended operating free-air temperature range, V_DD = 3 V
(unless otherwise noted)
VCO section
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
fosc
ts(fosc)
tr
tf
α(_fosc)
Operating oscillation frequency
Time to stable oscillation (see Note 8)
Rise time
Fall time
Duty cycle at VCO OUT
Temperature coefficient of oscillation frequency
RBIAS = 3.3 kΩ, VCO IN = 1/2 VDD
Measured from VCO INHIBIT↓
CL = 15 pF,
See Figure 3
CL = 50 pF,
See Figure 3
CL = 15 pF,
See Figure 3
CL = 50 pF,
See Figure 3
RBIAS = 3.3 kΩ, VCO IN = 1/2 VDD,
RBIAS = 3.3 kΩ, VCO IN = 1/2 VDD,
TA = –20°C to 75°C
15
45%
19
7
14
6
10
50%
23
10
14
12
55%
MHz
µs
ns
ns
0.04
%/°C
kSVS(fosc)
Supply voltage coefficient of oscillation frequency
RBIAS = 3.3 kΩ, VCO IN = 1.5 V,
VDD = 2.85 V to 3.15 V
0.02
%/mV
Jitter absolute (see Note 9)
RBIAS = 3.3 kΩ
100
ps
NOTES: 8. The time period to the stable VCO oscillation frequency after the VCO INHIBIT terminal is changed to a low level.
9. The low-pass-filter (LPF) circuit is shown in Figure 28 with calculated values listed in Table 7. Jitter performance is highly dependent
on circuit layout and external device characteristics. The jitter specification was made with a carefully designed PCB with no device
socket.
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 Figures 4 and 5 and Table 4
CL = 15 pF, See Figure 4
MIN TYP MAX UNIT
20
MHz
21
50
ns
23
50
11
30
ns
10
30
2.3
10 ns
2.1
10 ns
6
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