Crystal Oscillator. Si569 Datasheet

Si569 Oscillator. Datasheet pdf. Equivalent

Part Si569
Description Crystal Oscillator
Feature Ultra Series™ Crystal Oscillator (VCXO) Si569 Data Sheet Ultra Low Jitter I2C Programmable VCXO (10.
Manufacture Silicon Laboratories
Datasheet
Download Si569 Datasheet



Si569
Ultra SeriesCrystal Oscillator (VCXO)
Si569 Data Sheet
Ultra Low Jitter I2C Programmable VCXO (100 fs), 0.2 to
3000 MHz
The Si569 Ultra Seriesvoltage-controlled crystal oscillator utilizes Silicon
Laboratories’ advanced 4th generation DSPLL® technology to provide an ul-
tra-low jitter, low phase noise clock at any output frequency. The device is
user-programmed via simple I2C commands to provide any frequency from
0.2 to 3000 MHz with <1 ppb resolution and maintains exceptionally low jitter
for both integer and fractional frequencies across its operating range. On-
chip power supply filtering provides industry-leading power supply noise re-
jection, simplifying the task of generating low jitter clocks in noisy systems
that use switched-mode power supplies. Unlike a traditional XO, where a dif-
ferent crystal is required for each output frequency, the Si569 uses one sim-
ple crystal and a DSPLL IC-based approach to provide the desired output
frequency. The Si569 is factory-configurable for a wide variety of user speci-
fications, including startup frequency, I2C address, output format, and OE
pin location/polarity. Specific configurations are factory-programmed at time
of shipment, eliminating long lead times associated with custom oscillators.
Pin Assignments
SDA
7
VC 1
6 VDD
OE/FS 2
5 CLK–
GND
34
8
SCL
(Top View)
CLK+
Pin #
1
2
3
4
5
6
7
8
Descriptions
VC = Voltage Control Pin
Selectable via ordering option
OE = Output enable; FS = Frequency Select
GND = Ground
CLK+ = Clock output
CLK- = Complementary clock output. Not used for CMOS.
VDD = Power supply
SDA = I2C Serial Data
SCL = I2C Serial Clock
KEY FEATURES
• I2C programmable to any frequency from 0.2 to
3000 MHz with < 1 ppb resolution
• Ultra low jitter: 100 fs RMS Typ (12 kHz – 20 MHz)
• Configure up to 2 pin-selectable startup frequencies
• I2C interface supports 100 kbps, 400 kbps, and 1
Mbps (Fast Mode Plus)
• Excellent PSRR and supply noise immunity: –80
dBc Typ
• Programmable Kv (ppm/V) simplifies development
• 3.3 V, 2.5 V and 1.8 V VDD supply operation from
the same part number
• LVPECL, LVDS, CML, HCSL, CMOS, and Dual
CMOS output options
• 3.2x5, 5x7 mm package footprints
• Samples available with 1-2 week lead times
APPLICATIONS
• 100G/200G/400G OTN, coherent optics, PAM4
• 3G-SDI/12G-SDI/24G-SDI broadcast video
• Servers, switches, storage, search acceleration
• FPGA/ASIC clocking
Fixed
Frequency
Crystal
Frequency
Flexible
DSPLL
OSC
Digital
Phase
Detector
Phase Error
Cancellation
Digital
Loop
Filter
Phase Error
DCO
Vc ADC
Fractional
Divider
Control
NVM
Power Supply Regulation
OE, Frequency Select
(I2C and Pin Control)
Built-in Power Supply
Noise Rejection
Low
Noise
Driver
Flexible
Formats,
1.8V – 3.3V
Operation
silabs.com | Building a more connected world.
Rev. 1.1



Si569
Si569 Data Sheet
Ordering Guide
1. Ordering Guide
The Si569 XO supports a variety of options including startup frequency, output format, and control voltage tuning slope, as shown in the
chart below. Specific device configurations are programmed into the part at time of shipment, and samples are available in 1-2 weeks.
Silicon Laboratories provides an online part number configuration utility to simplify this process. Refer to www.silabs.com/oscillators to
access this tool and for further ordering instructions.
VCXO Series Description
569 I2C Programmable
Code
A
B
C
OE Pin
Pin 2
Pin 2
--
OE Polarity
Active High
Active Low
--
FS (Dual)
--
--
Pin 2
Package
A 5x7 mm
B 3.2x5 mm
Temperature Grade
G -40 to 85 °C
569 A A A A - - - - - - A B G R
Signal Format
LVPECL
LVDS
CMOS
CML
HCSL
Dual CMOS
(In-Phase)
Dual CMOS
(Complementary)
Custom1
VDD Range
2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
Order
Option
A
B
C
D
E
F
G
X
Code
A
B
C
D
Supported Frequency Range
0.2-3000 MHz
0.2-1500 MHz
0.2-800 MHz
0.2-325 MHz (CMOS available to 250 MHz)
Device Revision
Code
R
<Blank>
Reel
Tape and Reel
Coil Tape
Temperature Stability = ± 20 ppm
Vc Tuning
Slope
Kv (ppm/V)
Min APR (± ppm) at VDD 3
3.3V 2.5V 1.8V
A 60
20 --
--
B 75
40 20
--
C 105
70 40 20
D 150
115 75
45
E 180
145 100
65
F 225
190 135
85
Frequency
Code 2
Description
xxxxxx
The Si569 supports up to
two user-defined startup
frequencies in the range
selected by the Supported
Frequency Range code. A
user-defined 7-bit I2C
address is supported.
Each unique startup
configuration and I2C
address combination is
assigned a 6-digit code.
Notes:
1. Contact Silicon Labs for non-standard configurations.
2. Create custom part numbers at www.silabs.com/oscillators.
3. Min Absolute Pull Range (APR) includes temp stability, initial accuracy, load pulling, VDD variation, and 20 year aging at 70 °C.
a. For best jitter and phase noise performance, always choose the smallest Kv that meets the application’s minimum APR re-
quirements. Unlike SAW-based solutions which require higher Kv values to account for their higher temperature dependence,
the Si56x series provides lower Kv options to minimize noise coupling and jitter in real-world PLL designs.
b. Absolute Pull Range (APR) is the ability of a VCXO to track a signal over the product lifetime. A VCXO with an APR of ±20
ppm is able to lock to a clock with a ±20 ppm stability over 20 years over all operating conditions.
c. APR (±) = (0.5 x VDD x tuning slope) - (initial accuracy + temp stability + load pulling + VDD variation + aging).
d. Minimum APR values noted above include absolute worst case values for all parameters.
e. See application note, "AN266: VCXO Tuning Slope (Kv), Stability, and Absolute Pull Range (APR)" for more information.
1.1 Technical Support
Frequently Asked Questions (FAQ)
Oscillator Phase Noise Lookup Utility
Quality and Reliability
Development Kits
www.silabs.com/Si569-FAQ
www.silabs.com/oscillator-phase-noise-lookup
www.silabs.com/quality
www.silabs.com/oscillator-tools
silabs.com | Building a more connected world.
Rev. 1.1 | 2





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