TLC2932

HIGH-PERFORMANCE PHASE-LOCKED LOOP

SLAS097E – SEPTEMBER 1994 – REVISED MAY 1997

6

POST OFFICE BOX 655303

(unless otherwise noted)

VCO section

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

fosc

Operating oscillation frequency

RBIAS = 3.3 kΩ, VCO IN = 1/2 VDD

15

19

23

MHz

ts(fosc)

Time to stable oscillation (see Note 8)

Measured from VCO INHIBIT

↓

10

µs

t

Rise time

CL = 15 pF,

See Figure 3

7

14

ns

tr

Rise time

CL = 50 pF,

See Figure 3

14

ns

tf

Fall time

CL = 15 pF,

See Figure 3

6

12

ns

tf

Fall time

CL = 50 pF,

See Figure 3

10

ns

Duty cycle at VCO OUT

RBIAS = 3.3 kΩ, VCO IN = 1/2 VDD,

45%

50%

55%

α(fosc)

Temperature coefficient of oscillation frequency

RBIAS = 3.3 kΩ, VCO IN = 1/2 VDD,

TA = –20°C to 75°C

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

fmax

Maximum operating frequency

20

MHz

tPLZ

PFD output disable time from low level

21

50

ns

tPHZ

PFD output disable time from high level

See Figures 4 and 5 and Table 4

23

50

ns

tPZL

PFD output enable time to low level

See Figures 4 and 5 and Table 4

11

30

ns

tPZH

PFD output enable time to high level

10

30

ns

tr

Rise time

CL =15 pF

See Figure 4

2.3

10

ns

tf

Fall time

CL = 15 pF,

See Figure 4

2.1

10

ns