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Si5386 Datasheet Preview

Si5386 Datasheet

wireless Jitter Attenuator / Clock Multiplier

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Si5386 Data Sheet
12-Channel, Any-Frequency, Any-Output wireless Jitter Attenu-
ator / Clock Multiplier with Ultra-Low Noise
The Si5386 is an ultra high performance wireless jitter attenuator with any frequency
outputs for eCPRI (ethernet-based Common Public Radio Interface) applications,
which demand the highest level of integration and phase noise performance. Based
on Silicon Laboratories’ 4th generation DSPLL technology, the Si5386 combines
frequency synthesis and jitter attenuation in a highly integrated digital solution with a
cost-effective oscillator, and without the need of any external loop filter components.
The fixed frequency oscillator provides frequency stability for free-run and holdover
modes. This all-digital solution provides superior performance that is highly immune
to external board disturbances such as power supply noise.
eCPRI-based remote radio heads and fixed wireless systems require a diverse set
of clocks such as ADC/DAC, RF LOs, and Ethernet clocks. The Si5386 architecture
is designed to deliver high-performance JESD204B DCLK and SYSREF clock pairs
and flexible any-rate clocks for non-CPRI clocks such as Ethernet and system refer-
ence clocks all from a single IC.
Applications:
• Wireless Infrastructure
• eCPRI RRH (Remote Radio Head)
• BBU (Baseband Unit)
• Small Cell and μBTS
• DOCSIS
• Test and Measurement
KEY FEATURES
• Flexible timing in a single IC
• Generates any combination of output
frequencies from any input frequency
• Input frequency range:
• Differential: 7.68 MHz to 750 MHz
• LVCMOS: 7.68 MHz to 250 MHz
• Output frequency range (Integer):
• Differential: up to 2.94912 GHz
• Output frequency range (fractional):
• Differential: up to 735 MHz
• LVCMOS: up to 250 MHz
• Ultra-low RMS jitter:
• 72 fs typ (12 kHz–20 MHz)
• Phase noise of 122.88MHz carrier frequency:
• 118 dBc/Hz @ 100Hz offset
• ITU-T G.8262 compliant
54 MHz
OSC
IN_SEL
IN0
IN1
IN2
IN3/FB_IN
I2C_SEL
SDA/SDIO
A1/SDO
SCLK
A0/CS
LOL
INTR
÷INT
÷INT
÷INT
÷INT
DSPLL
÷INT
÷INT
÷0INT
Multi
Synth
Multi
Synth
Multi
Synth
Multi
Synth
SPI/
Multi
I2C
Synth
÷INT
÷INT
÷INT
÷0INT
÷INT
÷INT
NVM
Status
Monitors
÷INT
÷0INT
÷INT
PDN RST
SYNC OE
OUT0A
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT9A
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
1
Rev. 1.02 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 26, 2021
1




Skyworks Solutions

Si5386 Datasheet Preview

Si5386 Datasheet

wireless Jitter Attenuator / Clock Multiplier

No Preview Available !

Table of Contents
1. Features List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Frequency Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 DSPLL Loop Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Fastlock Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.4 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.4.1 Initialization and Reset . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4.2 Freerun Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4.3 Lock Acquisition Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4.4 Locked Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4.5 Holdover Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4.6 VCO Freeze Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.5 External Reference (XA/XB) . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.6 Inputs (IN0, IN1, IN2, IN3) . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.6.1 Manual Input Switching (IN0, IN1, IN2, IN3) . . . . . . . . . . . . . . . . . . . 9
3.6.2 Automatic Input Selection (IN0, IN1, IN2, IN3) . . . . . . . . . . . . . . . . . .10
3.6.3 Hitless Input Switching . . . . . . . . . . . . . . . . . . . . . . . . . .10
3.6.4 Ramped Input Switching . . . . . . . . . . . . . . . . . . . . . . . . .10
3.6.5 Glitchless Input Switching . . . . . . . . . . . . . . . . . . . . . . . . .10
3.7 Fault Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3.7.1 Input LOS Detection. . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.7.2 Reference Clock LOS Detection. . . . . . . . . . . . . . . . . . . . . . .11
3.7.3 OOF Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.7.4 LOL Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.7.5 Interrupt Pin (INTRb) . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.8 Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.8.1 Output Crosspoint . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.8.2 Output Signal Format . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.8.3 Output Terminations . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.8.4 Programmable Amplitude For Differential Outputs. . . . . . . . . . . . . . . . .15
3.8.5 LVCMOS Output Impedance and Drive Strength Selection . . . . . . . . . . . . . .16
3.8.6 LVCMOS Output Signal Swing . . . . . . . . . . . . . . . . . . . . . . .16
3.8.7 LVCMOS Output Polarity . . . . . . . . . . . . . . . . . . . . . . . . .16
3.8.8 Output Enable/Disable . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.8.9 Output Disable During LOL . . . . . . . . . . . . . . . . . . . . . . . .16
3.8.10 Output Disable During Reference LOS . . . . . . . . . . . . . . . . . . . .16
3.8.11 Output Driver State When Disabled . . . . . . . . . . . . . . . . . . . . .16
3.8.12 Synchronous Output Disable Feature . . . . . . . . . . . . . . . . . . . .17
3.8.13 Static Output Skew Control . . . . . . . . . . . . . . . . . . . . . . . .17
3.8.14 Dynamic Output Skew Control . . . . . . . . . . . . . . . . . . . . . . .17
3.8.15 Zero Delay Mode . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.8.16 Output Divider (R) Synchronization . . . . . . . . . . . . . . . . . . . . .18
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2
Rev. 1.02 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 26, 2021
2


Part Number Si5386
Description wireless Jitter Attenuator / Clock Multiplier
Maker Skyworks Solutions
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Si5386 Datasheet PDF






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