SI5347_16 datasheet(5/55 Pages) SILABS

No de pièce	SI5347

Description	Dual/Quad DSPLL Any-Frequency, Any-Output Jitter Attenuators

Download	55 Pages

Scroll/Zoom	100%

Fabricant	SILABS [Silicon Laboratories]

Site Internet	http://www.silabs.com

Logo

5 / 55 page

No valid

input clocks

selected

Lock Acquisition

(Fast Lock)

Locked

Mode

Holdover

Mode

Phase lock on

selected input

clock is achieved

An input is

qualified and

available for

selection

No valid input

clocks available

for selection

Free-run

Valid input clock

selected

Reset and

Initialization

Power-Up

Selected input

clock fails

Yes

No

Holdover

History

Valid?

Other Valid

Clock Inputs

Available?

No

Yes

Input Clock

Switch

Figure 3.1. Modes of Operation

3.3.2 Free-run Mode

Once power is applied to the Si5347 and initialization is complete, all four DSPLLs will automatically enter Free-run Mode. The frequen-

cy accuracy of the generated output clocks in Free-run Mode is entirely dependent on the frequency accuracy of the external crystal or

reference clock on the XA/XB pins. For example, if the crystal frequency is ±100 ppm, then all the output clocks will be generated at

their configured frequency ±100 ppm in Free-run Mode. Any drift of the crystal frequency will be tracked at the output clock frequencies.

A TCXO or OCXO is recommended for applications that need better frequency accuracy and stability while in Free-run Mode or Hold-

over Mode.

3.3.3 Lock Acquisition Mode

Each of the DSPLLs independently monitors its configured inputs for a valid clock. If at least one valid clock is available for synchroni-

zation, a DSPLL will automatically start the lock acquisition process.

If the fast lock feature is enabled, a DSPLL will acquire lock using the Fastlock Loop Bandwidth setting and then transition to the DSPLL

Loop Bandwidth setting when lock acquisition is complete. During lock acquisition the outputs will generate a clock that follows the VCO

frequency change as it pulls-in to the input clock frequency.

3.3.4 Locked Mode

Once locked, a DSPLL will generate output clocks that are both frequency and phase locked to their selected input clocks. At this point,

any XTAL frequency drift will not affect the output frequency. Each DSPLL has its own LOLb pin and status bit to indicate when lock is

achieved. See 3.7.4 LOL Detection for more details on the operation of the loss of lock circuit.

Si5347/46 Rev D Data Sheet

Functional Description

silabs.com | Smart. Connected. Energy-friendly.

Rev. 1.0 | 4

Numéro de pièce similaire - SI5347_16

Fabricant	No de pièce	Fiches technique	Description
Silicon Laboratories	SI5347-46	210Kb / 13P	Data Sheet Errata for Product Revision B
Skyworks Solutions Inc.	SI5347-D-EVB	879Kb / 56P	Dual/Quad DSPLL™ Any-Frequency, Any-Output Jitter Attenuators Rev. 1.1
Silicon Laboratories	SI5347-EVB	2Mb / 21P	Powered from USB port or external
Skyworks Solutions Inc.	SI5347A-D-GM	879Kb / 56P	Dual/Quad DSPLL™ Any-Frequency, Any-Output Jitter Attenuators Rev. 1.1
Skyworks Solutions Inc.	SI5347B-D-GM	879Kb / 56P	Dual/Quad DSPLL™ Any-Frequency, Any-Output Jitter Attenuators Rev. 1.1

More results

Description similaire - SI5347_16

Fabricant	No de pièce	Fiches technique	Description
Silicon Laboratories	SI5347	2Mb / 59P	DUAL/QUAD DSPLL ANY-FREQUENCY, ANY-OUTPUT JITTER ATTENUATORS
Skyworks Solutions Inc.	SI5347	879Kb / 56P	Dual/Quad DSPLL™ Any-Frequency, Any-Output Jitter Attenuators Rev. 1.1
Skyworks Solutions Inc.	SI5397	1Mb / 60P	Dual/Quad DSPLL™ Any-Frequency, Any-Output Jitter Attenuators Rev. 1.2
Silicon Laboratories	SI5341	2Mb / 56P	LOW-JITTER, 10-OUTPUT, ANY-FREQUENCY, ANY-OUTPUT CLOCK GENERATOR
	SI5345	1Mb / 60P	10-Channel, Any-Frequency, Any-Output Jitter Attenuator/ Clock Multiplier
	SI5345	1Mb / 62P	10-CHANNEL, ANY-FREQUENCY, ANY-OUTPUT JITTER ATTENUATOR/CLOCK MULTIPLIER
Skyworks Solutions Inc.	SI5391	1Mb / 45P	Ultra Low-Jitter, 12-Output, Any-Frequency, Any-Output Clock Generator Rev. 0.7
	SI5345	976Kb / 58P	10-Channel, Any-Frequency, Any-Output Jitter Attenuator/ Clock Multiplier Rev. 1.2
	SI5334	1Mb / 37P	PIN-CONTROLLED ANY-FREQUENCY, ANY-OUTPUT QUAD CLOCK GENERATOR Rev. 1.3
	SI5341	1Mb / 49P	Low-Jitter, 10 or 4-Output, Any-Frequency, Any-Output Clock Generator Rev. 1.1

More results

SI5347 Fiches technique(PDF) 5 Page - Silicon Laboratories

SI5347 Fiches technique(HTML) 5 Page - Silicon Laboratories

Numéro de pièce similaire - SI5347_16

Description similaire - SI5347_16

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

Fiches technique Télécharger

Lien URL