552CF000132DG

Si 5 52 REVISION D D U A L F REQUENCY VOLTAGE - C ON TROLLED C R Y S TA L O SCILLATOR (VCXO) 10 MH Z TO 1 . 4 G H Z Features Available with any-rate output frequencies from 10–945 MHz and selected frequencies to 1.4 GHz  Two selectable output frequencies    3rd generation DSPLL® with superior  jitter performance   3x better frequency stability than SAW-based oscillators   Internal fixed crystal frequency ensures high reliability and low aging Available CMOS, LVPECL, LVDS, and CML outputs 3.3, 2.5, and 1.8 V supply options Industry-standard 5 x 7 mm package and pinout Pb-free/RoHS-compliant Applications Si5602 Ordering Information: SONET/SDH  xDSL  10 GbE LAN/WAN Low-jitter clock generation  Optical modules  Clock and data recovery  See page 10.  Description The Si552 dual-frequency VCXO utilizes Silicon Laboratories’ advanced DSPLL® circuitry to provide a very low jitter clock for all output frequencies. The Si552 is available with any-rate output frequency from 10 to 945 MHz and selected frequencies to 1400 MHz. Unlike traditional VCXOs, where a different crystal is required for each output frequency, the Si552 uses one fixed crystal frequency to provide a wide range of output frequencies. This IC-based approach allows the crystal resonator to provide exceptional frequency stability and reliability. In addition, DSPLL clock synthesis provides superior supply noise rejection, simplifying the task of generating low-jitter clocks in noisy environments typically found in communication systems. The Si552 IC-based VCXO is factory-configurable for a wide variety of user specifications including frequency, supply voltage, output format, tuning slope, and temperature stability. Specific configurations are factory programmed at time of shipment, thereby eliminating the long lead times associated with custom oscillators. Pin Assignments: See page 9. (Top View) VC 1 6 VDD FS 2 5 CLK– GND 3 4 CLK+ Functional Block Diagram VDD CLK- CLK+ Fixed Frequency XO Any-rate 10–1400 MHz DSPLL® Clock Synthesis ADC VC Rev. 1.2 6/18 FS GND Copyright © 2018 by Silicon Laboratories Si552 Si5 52 1. Electrical Specifications Table 1. Recommended Operating Conditions Parameter Supply Voltage1 Symbol Test Condition Min Typ Max Units VDD 3.3 V option 2.97 3.3 3.63 V 2.5 V option 2.25 2.5 2.75 V 1.8 V option 1.71 1.8 1.89 V Output enabled LVPECL CML LVDS CMOS — — — — 120 108 99 90 130 117 108 98 Tristate mode — 60 75 mA VIH 0.75 x VDD — — V VIL — — 0.5 V –40 — 85 ºC Supply Current Frequency Select IDD (FS)2 Operating Temperature Range TA mA Notes: 1. Selectable parameter specified by part number. See Section 3. "Ordering Information" on page 10 for further details. 2. FS pin includes a 17 k resistor to VDD. Table 2. VC Control Voltage Input Parameter Control Voltage Tuning Slope 1,2,3 Control Voltage Linearity4 Symbol Test Condition Min Typ Max Units KV 10 to 90% of VDD — 33 45 90 135 180 356 — ppm/V LVC BSL –5 ±1 +5 % Incremental –10 ±5 +10 % Modulation Bandwidth BW 9.3 10.0 10.7 kHz VC Input Impedance ZVC 500 — — k — VDD/2 — V VDD V Nominal Control Voltage Control Voltage Tuning Range VCNOM @ fO 0 VC Notes: 1. Positive slope; selectable option by part number. See Section 3. "Ordering Information" on page 10. 2. For best jitter and phase noise performance, always choose the smallest KV that meets the application’s minimum APR requirements. See “AN266: VCXO Tuning Slope (KV), Stability, and Absolute Pull Range (APR)” for more information. 3. KV variation is ±10% of typical values. 4. BSL determined from deviation from best straight line fit with VC ranging from 10 to 90% of VDD. Incremental slope determined with VC ranging from 10 to 90% of VDD. 2 Rev. 1.2 Si552 Table 3. CLK± Output Frequency Characteristics Parameter 1,2,3 Nominal Frequency Temperature Stability Symbol Test Condition Min Typ Max Units fO LVDS/CML/LVPECL 10 — 945 MHz CMOS 10 — 160 MHz TA = –40 to +85 °C –20 –50 –100 — — — +20 +50 +100 ppm ±12 — ±375 ppm Frequency drift over first year. — — ±3 ppm Frequency drift over 15 year life. — — ±10 ppm 1,4 Absolute Pull Range1,4 APR Aging Power up Time5 tOSC — — 10 ms Settling Time After FS Change tFRQ — — 10 ms Notes: 1. See Section 3. "Ordering Information" on page 10 for further details. 2. Specified at time of order by part number. Also available in frequencies from 970 to 1134 MHz and 1213 to 1417 MHz. 3. Nominal output frequency set by VCNOM = VDD/2. 4. Selectable parameter specified by part number. 5. Time from power up or tristate mode to fO (to within ±1 ppm of fO). Table 4. CLK± Output Levels and Symmetry Parameter LVPECL Output Option1 LVDS Output Option 2 CML Output Option2 Symbol Test Condition Min Typ Max Units VO mid-level VDD – 1.42 — VDD – 1.25 V VOD swing (diff) 1.1 — 1.9 VPP VSE swing (single-ended) 0.55 — 0.95 VPP VO mid-level 1.125 1.20 1.275 V VOD swing (diff) 0.5 0.7 0.9 VPP 2.5/3.3 V option mid-level — VDD – 1.30 — V 1.8 V option mid-level — VDD – 0.36 — V 2.5/3.3 V option swing (diff) 1.10 1.50 1.90 VPP 1.8 V option swing (diff) 0.35 0.425 0.50 VPP VOH IOH = 32 mA 0.8 x VDD — VDD V VOL IOL = 32 mA — — 0.4 V tR, tF LVPECL/LVDS/CML — — 350 ps CMOS with CL = 15 pF — 1 — ns 45 — 55 % VO VOD CMOS Output Option3 Rise/Fall time (20/80%) Symmetry (duty cycle) SYM LVPECL: LVDS: CMOS: VDD – 1.3 V (diff) 1.25 V (diff) VDD/2 Notes: 1. 50  to VDD – 2.0 V. 2. Rterm = 100  (differential). 3. CL = 15 pF Rev. 1.2 3 Si5 52 Table 5. CLK± Output Phase Jitter Parameter 1,2,3 Phase Jitter (RMS) for FOUT > 500 MHz Symbol Test Condition Min Typ Max J Kv = 33 ppm/V 12 kHz to 20 MHz (OC-48) 50 kHz to 80 MHz (OC-192) — — 0.26 0.26 — — Kv = 45 ppm/V 12 kHz to 20 MHz (OC-48) 50 kHz to 80 MHz (OC-192) — — 0.27 0.26 — — Kv = 90 ppm/V 12 kHz to 20 MHz (OC-48) 50 kHz to 80 MHz (OC-192) — — 0.32 0.26 — — Kv = 135 ppm/V 12 kHz to 20 MHz (OC-48) 50 kHz to 80 MHz (OC-192) — — 0.40 0.27 — — Units ps ps ps ps Kv = 180 ppm/V 12 kHz to 20 MHz (OC-48) 50 kHz to 80 MHz (OC-192) ps — — 0.49 0.28 — — Kv = 356 ppm/V 12 kHz to 20 MHz (OC-48) 50 kHz to 80 MHz (OC-192) — — 0.87 0.33 — — ps Notes: 1. Refer to AN255, AN256, and AN266 for further information. 2. For best jitter and phase noise performance, always choose the smallest KV that meets the application’s minimum APR requirements. See “AN266: VCXO Tuning Slope (KV), Stability, and Absolute Pull Range (APR)” for more information. 3. See “AN255: Replacing 622 MHz VCSO devices with the Si550 VCXO” for comparison highlighting power supply rejection (PSR) advantage of Si55x versus SAW-based solutions. 4. Max jitter for LVPECL output with VC=1.65V, VDD=3.3V, 155.52 MHz. 5. Max offset frequencies: 80 MHz for FOUT > 250 MHz, 20 MHz for 50 MHz < FOUT