PDF LMK03002C Data sheet ( Hoja de datos )

Número de pieza	LMK03002C
Descripción	Precision Clock Conditioner
Fabricantes	National Semiconductor
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No Preview Available ! www.DataSheet4U.com August 2007 LMK03002/LMK03002C Precision Clock Conditioner with Integrated VCO General Description The LMK03002/LMK03002C precision clock conditioners combine the functions of jitter cleaning/reconditioning, multi- plication, and distribution of a reference clock. The devices integrate a Voltage Controlled Oscillator (VCO), a high per- formance Integer-N Phase Locked Loop (PLL), a partially integrated loop filter, and four LVPECL clock output distribu- tion blocks. The VCO output is optionally accessible on the Fout port. In- ternally, the VCO output goes through a VCO Divider to feed the various clock distribution blocks. Each clock distribution block includes a programmable di- vider, a phase synchronization circuit, a programmable delay, a clock output mux, and an LVPECL output buffer. This allows multiple integer-related and phase-adjusted copies of the ref- erence to be distributed to four system components. The clock conditioners come in a 48-pin LLP package and are footprint compatible with other clocking devices in the same family. Features ■ Integrated VCO with very low phase noise floor ■ Integrated Integer-N PLL with outstanding normalized phase noise contribution of -224 dBc/Hz ■ Clock generator performance (10 Hz - 20 MHz) — LMK03002C: 200 fs RMS jitter ■ Jitter cleaner performance grade (12 kHz to 20 MHz) — LMK03002: 800 fs RMS jitter — LMK03002C: 400 fs RMS jitter ■ VCO frequency: 1566 to 1724 MHz ■ Clock output frequency range of 1 to 862 MHz ■ 4 LVPECL clock outputs ■ Partially integrated loop filter ■ Dedicated divider and delay blocks on each clock output ■ Pin compatible family of clocking devices ■ 3.15 to 3.45 V operation ■ Package: 48 pin LLP (7.0 x 7.0 x 0.8 mm) Target Applications ■ Data Converter Clocking ■ Networking, SONET/SDH, DSLAM ■ Wireless Infrastructure ■ Medical ■ Test and Measurement ■ Military / Aerospace TRI-STATE® is a registered trademark of National Semiconductor Corporation. © 2007 National Semiconductor Corporation 300206 www.national.com 1 page Symbol www.DataSheet4U.com Parameter Conditions PLL (Continued) ISINKCPout Charge Pump Sink Current ICPoutTRI ICPout%MIS Charge Pump TRI-STATE® Current Magnitude of Charge Pump Sink vs. Source Current Mismatch Magnitude of Charge Pump ICPoutVTUNE Current vs. Charge Pump Voltage Variation VCPout = Vcc/2, PLL_CP_GAIN = 1x VCPout = Vcc/2, PLL_CP_GAIN = 4x VCPout = Vcc/2, PLL_CP_GAIN = 16x VCPout = Vcc/2, PLL_CP_GAIN = 32x 0.5 V < VCPout < Vcc - 0.5 V VCPout = Vcc / 2 TA = 25°C 0.5 V < VCPout < Vcc - 0.5 V TA = 25°C ICPoutTEMP Magnitude of Charge Pump Current vs. Temperature Variation PN10kHz PLL 1/f Noise at 10 kHz Offset (Note 6) PLL_CP_GAIN = 1x Normalized to 1 GHz Output Frequency PLL_CP_GAIN = 32x PN1Hz Normalized Phase Noise Contribution (Note 7) PLL_CP_GAIN = 1x PLL_CP_GAIN = 32x VCO fFout \|ΔTCL\| VCO Tuning Range Allowable Temperature Drift for Continuous Lock LMK03002/LMK03002C After programming R15 for lock, no changes to output configuration are permitted to guarantee continuous lock. (Note 8) pFout KVtune Output Power to a 50 Ω load driven by Fout LMK03002/LMK03002C; TA = 25 °C Fine Tuning Sensitivity (The lower sensitivity indicates the typical sensitivity at the lower end of the tuning LMK03002/LMK03002C range, the higher sensitivity at the higher end of the tuning range) JRMSFout Fout RMS Period Jitter LMK03002 12 kHz to 20 MHz bandwidth LMK03002C 12 kHz to 20 MHz bandwidth L(f)Fout Fout Single Side Band Phase Noise LMK03002C fFout = 1724 MHz (Note 9) LMK03002C fFout = 1566 MHz (Note 9) 10 kHz Offset 100 kHz Offset 1 MHz Offset 10 MHz Offset 10 kHz Offset 100 kHz Offset 1 MHz Offset 10 MHz Offset Min Typ Max Units -100 -400 -1600 -3200 2 3 10 μA nA % 4% 4 -117 -122 -219 -224 % dBc/Hz dBc/Hz 1566 1724 MHz 125 °C 2 dBm 11 to 15 MHz/V 800 400 -89 -113 -135 -155 -91 -115 -137 -156 fs dBc/Hz 5 www.national.com 5 Page www.DataSheet4U.com 11 www.national.com 11 Page

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