LTC6955 datasheet(5/22 Pages) AD

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LTC6955

Rev 0

For more information www.analog.com

Preliminary Technical Data

Advance Product Information Subject to Change

Rev PrA

TYPICAL PERFORMANCE CHARACTERISTICS

Total Phase Noise, Driven from

VCO in a Locked PLL, fIN =

7500MHz, FILT = GND

Additive Jitter vs Input Slew Rate,

ADC SNR Method

CML Differential Output at 7.5GHz

TA = 25°C. VD+ = VIN+ = VOUT+ = 3.3V, unless otherwise noted.

CML Differential Output at 1GHz

Differential Output Swing

vs Frequency, Junction

Temperature

Expected Skew Variation

for a Single LTC6955-1

Expected Skew Variation

for a Single LTC6955

Skew Variation with Junction

Temperature for a Single Typical

LTC6955

VCO: CVCO55CC–4000–4000

NOTE 7

VCO OUTPUT

LTC6955 OUTPUT

LTC6955–1 OUT10 (DIV 2)

OFFSET FREQUENCY (Hz)

100

10k

100k

10M 40M

–180

–170

–160

–150

–140

–130

–120

–110

–100

6955 G01

NOTES 5, 6

FILT = GND

FILT = V+

INPUT SLEW RATE (V/ns)

0.1

100

200

300

400

500

600

700

800

900

1000

6955 G02

NOTE 9

50ps/DIV

–0.5

–0.4

–0.3

–0.2

–0.1

0.0

0.1

0.2

0.3

0.4

0.5

6955 G03

NOTE 9

200ps/DIV

–0.5

–0.4

–0.3

–0.2

–0.1

0.0

0.1

0.2

0.3

0.4

0.5

6955 G04

NOTES 8, 9

125°C

25°C

–40°C

OUTPUT FREQUENCY (GHz)

0.50

0.60

0.70

0.80

0.90

1.00

1.10

6955 G05

fIN = 200MHz

AVERAGE

–3σ

+3σ

NOTES 4, 10

DIVIDE BY 2

OUTPUT

9 10

–30

–20

–10

6955 G07

NOTE 4

OUT0

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

OUT8

OUT9

OUT10

TJ (°C)

–40 –20

100 120

–40

–30

–20

–10

6955 G08

fIN = 200MHz

AVERAGE

–3σ

+3σ

NOTES 4, 10

OUTPUT

9 10

–30

–20

–10

6955 G06

LTC6955-1 OUT10 Skew vs

Frequency, Junction Temperature

PLACEHOLDER

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