PDF LMK03000C Data sheet ( Hoja de datos )

Número de pieza	LMK03000C
Descripción	(LMK03000 / LMK03001) Precision Clock Conditioner
Fabricantes	National Semiconductor
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No Preview Available ! www.DataSheet4U.com ADVANCE INFORMATION November 2006 LMK03000/LMK03000C/LMK03001/LMK03001C Precision Clock Conditioner with Integrated VCO General Description The LMK03000/LMK03000C/LMK03001/LMK03001C preci- sion clock conditioners combine the functions of jitter clean- ing/reconditioning, multiplication, and distribution of a refer- ence clock. The devices integrate a Voltage Controlled Oscillator (VCO), a high performance Integer-N Phase Locked Loop (PLL), a partially integrated loop filter, three LVDS, and five LVPECL clock output distribution blocks. The VCO output is optionally accessible on the Fout port. In- ternally, the VCO output goes through an Input 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 LVDS or LVPECL output buffer. This allows multiple integer-related and phase-adjusted copies of the reference to be distributed to eight system com- ponents. 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 and Integer-N PLL ■ Two performance grades (12 kHz to 20 MHz) — LMK03000/LMK03001: Less than 800 fs RMS — LMK03000C/LMK03001C: Less than 400 fs RMS ■ Two VCO frequency plans — LMK03000/LMK03000C: 1185 to 1296 MHz — LMK03001/LMK03001C: 1470 to 1570 MHz ■ Clock output frequency range of 1 to 785 MHz ■ 3 LVDS and 5 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 ■ SONET/SDH, DSLAM ■ Networking ■ Wireless Infrastructure ■ Medical ■ Test and Measurement ■ Military / Aerospace Functional Block Diagram © 2006 National Semiconductor Corporation 202114 20211401 www.national.com 1 page Symbol JitterADD tSKEW VOD ΔVOD VOS ΔVOS ISA ISB ISAB JitterADD tSKEW VOH VOL VOD VIH VIL IIH IIL VOH VOL VIH VIL IIH IIL Parameter Conditions Min Typ Clock Distribution Section (Note 8) - LVDS Clock Outputs (CLKout0 to CLKout2) Additive RMS Jitter (Note 8) CLKoutX_MUX RL = 100 Ω = Bypass Input Bus = 785 MHz Bandwidth = 12 kHz to 20 MHz CLKoutX_MUX = Divided CLKoutX_DIV = 4 40 150 CLKoutX to CLKoutY Differential Output Voltage Change in magnitude of VOD for complementary output states Equal loading and identical channel configuration RL = 100 Ω RL = 100 Ω RL = 100 Ω -30 ±4 250 350 -35 Output Offset Voltage Change in magnitude of VOS for complementary output states RL = 100 Ω RL = 100 Ω 1.125 -35 1.25 Clock Output Short Circuit Current single ended Single ended outputs shorted to GND -24 Clock Output Short Circuit Current differential Complementary outputs tied together -12 Clock Distribution Section (Note 8) - LVPECL Clock Outputs (CLKout3 to CLKout7) Additive RMS Jitter (Note 8) RL = 100 Ω Input Bus = 785 CLKoutX_MUX = Bypass MHz CLKoutX_MUX Integration = Divided Bandwidth = 12 kHz CLKoutX_DIV = to 20 MHz 4 40 150 CLKoutX to CLKoutY Equal loading and identical channel configuration -30 ±3 Termination = 50 Ω to Vcc - 2 V Output High Voltage Vcc - 0.98 Output Low Voltage Termination = 50 Ω to Vcc - 2 V Vcc - 1.8 Differential Output Voltage 660 810 Digital LVTTL Interfaces (Note 9) High-Level Input Voltage 2.0 Low-Level Input Voltage High-Level Input Current Low-Level Input Current High-Level Output Voltage VIH = Vcc VIL = 0 IOH = -500 µA -1.0 -1.0 Vcc - 0.4 Low-Level Output Voltage IOL = -500 µA Digital MICROWIRE Interfaces (Note 10) High-Level Input Voltage 1.6 Low-Level Input Voltage High-Level Input Current Low-Level Input Current VIH = Vcc VIL = 0 -1.0 -1.0 Max 30 450 35 1.375 35 24 12 30 965 Vcc 0.8 1.0 1.0 0.4 Vcc 0.4 1.0 1.0 Units fs ps mV mV V mV mA mA fs ps V V mV V V µA µA V V V V µA µA 5 www.national.com 5 Page 11 www.national.com 11 Page

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