Texas Instruments

The LMK04100 family of precision clock conditioners provides jitter cleaning, clock multiplication and distribution without the need for high-performance VCXO modules. When connected to a recovered system reference clock and a VCXO, the device generates 5 low jitter clocks in LVCMOS, LVDS, or LVPECL formats. The LMK04100 family of precision clock conditioners provides jitter cleaning, clock multiplication and distribution without the need for high-performance VCXO modules. When connected to a recovered system reference clock and a VCXO, the device generates 5 low jitter clocks in LVCMOS, LVDS, or LVPECL formats.

The LMK04208 is a high performance clock conditioner with superior clock jitter cleaning, generation, and distribution with advanced features to meet next generation system requirements. The dual loop PLLatinum™ architecture is capable of 111 fs, RMS jitter (12 kHz to 20 MHz) using a low-noise VCXO module or sub-200 fs rms jitter (12 kHz to 20 MHz) using a low cost external crystal and varactor diode. The dual loop architecture consists of two high-performance phase-locked loops (PLL), a low-noise crystal oscillator circuit, and a high-performance voltage controlled oscillator (VCO). The first PLL (PLL1) provides low-noise jitter cleaner functionality while the second PLL (PLL2) performs the clock generation. PLL1 can be configured to either work with an external VCXO module or the integrated crystal oscillator with an external tunable crystal and varactor diode. When paired with a very narrow loop bandwidth, PLL1 uses the superior close-in phase noise (offsets below 50 kHz) of the VCXO module or the tunable crystal to clean the input clock. The output of PLL1 is used as the clean input reference to PLL2 where it locks the integrated VCO. The loop bandwidth of PLL2 can be optimized to clean the far-out phase noise (offsets above 50 kHz) where the integrated VCO outperforms the VCXO module or tunable crystal used in PLL1. The LMK04208 is a high performance clock conditioner with superior clock jitter cleaning, generation, and distribution with advanced features to meet next generation system requirements. The dual loop PLLatinum™ architecture is capable of 111 fs, RMS jitter (12 kHz to 20 MHz) using a low-noise VCXO module or sub-200 fs rms jitter (12 kHz to 20 MHz) using a low cost external crystal and varactor diode. The dual loop architecture consists of two high-performance phase-locked loops (PLL), a low-noise crystal oscillator circuit, and a high-performance voltage controlled oscillator (VCO). The first PLL (PLL1) provides low-noise jitter cleaner functionality while the second PLL (PLL2) performs the clock generation. PLL1 can be configured to either work with an external VCXO module or the integrated crystal oscillator with an external tunable crystal and varactor diode. When paired with a very narrow loop bandwidth, PLL1 uses the superior close-in phase noise (offsets below 50 kHz) of the VCXO module or the tunable crystal to clean the input clock. The output of PLL1 is used as the clean input reference to PLL2 where it locks the integrated VCO. The loop bandwidth of PLL2 can be optimized to clean the far-out phase noise (offsets above 50 kHz) where the integrated VCO outperforms the VCXO module or tunable crystal used in PLL1.

The LMK04228 device is the industry’s high performance clock conditioner with JEDEC JESD204B support. The 14 clock outputs from PLL2 can be configured to drive seven JESD204B converters or other logic devices using device and SYSREF clocks. SYSREF can be provided using both DC and AC coupling. Not limited to JESD204B applications, each of the 14 outputs can be individually configured as high performance outputs for traditional clocking systems. The high performance combined with features like the ability to trade off between power or performance, dual VCOs, holdover, and per-output adjustable analog and digital delay make the LMK04228 ideal for providing flexible high performance clocking trees. The LMK04228 device is the industry’s high performance clock conditioner with JEDEC JESD204B support. The 14 clock outputs from PLL2 can be configured to drive seven JESD204B converters or other logic devices using device and SYSREF clocks. SYSREF can be provided using both DC and AC coupling. Not limited to JESD204B applications, each of the 14 outputs can be individually configured as high performance outputs for traditional clocking systems. The high performance combined with features like the ability to trade off between power or performance, dual VCOs, holdover, and per-output adjustable analog and digital delay make the LMK04228 ideal for providing flexible high performance clocking trees.

The LMK04368-EP is a high performance clock conditioner with JEDEC JESD204B/C support for space applications. The 14 clock outputs from PLL2 can be configured to drive seven JESD204B/C converters or other logic devices using device and SYSREF clocks. SYSREF can be provided using both DC and AC coupling. Not limited to JESD204B/C applications, each of the 14 outputs can be individually configured as high-performance outputs for traditional clocking systems. This device can be configured for operation in dual PLL, single PLL, or clock distribution modes with or without SYSREF generation or reclocking. PLL2 may operate with either internal or external VCO. The high performance combined with features like the ability to trade off between power and performance, dual VCOs, dynamic digital delay, and holdover allows to provide flexible high performance clocking trees. The LMK04368-EP is a high performance clock conditioner with JEDEC JESD204B/C support for space applications. The 14 clock outputs from PLL2 can be configured to drive seven JESD204B/C converters or other logic devices using device and SYSREF clocks. SYSREF can be provided using both DC and AC coupling. Not limited to JESD204B/C applications, each of the 14 outputs can be individually configured as high-performance outputs for traditional clocking systems. This device can be configured for operation in dual PLL, single PLL, or clock distribution modes with or without SYSREF generation or reclocking. PLL2 may operate with either internal or external VCO. The high performance combined with features like the ability to trade off between power and performance, dual VCOs, dynamic digital delay, and holdover allows to provide flexible high performance clocking trees.

The LMK0461x device family is the industry’s highest performance and lowest power jitter cleaner with JESD204B support. The LMK0461x device family is the industry’s highest performance and lowest power jitter cleaner with JESD204B support.

The LMK0461x device family is the industry’s highest performance and lowest power jitter cleaner with JESD204B support. The 16 clock outputs can be configured to drive eight JESD204B converters or other logic devices using device and SYSREF clocks. The 17th output can be configured to provide a signal from PLL2 or a copy from the external VCXO. Features like fully integrated PLL1 and PLL2 loop filters, a high number of integrated LDOs, digital and analog delay, the flexibility to supply outputs with 3.3V, 2.5V and 1.8V as well as the option to generate multiple SYSREF domains simultaneously makes the device easy to use. Not limited to JESD204B applications each of the 17 outputs can be configured for traditional clocking systems. The LMK0461x device family is the industry’s highest performance and lowest power jitter cleaner with JESD204B support. The 16 clock outputs can be configured to drive eight JESD204B converters or other logic devices using device and SYSREF clocks. The 17th output can be configured to provide a signal from PLL2 or a copy from the external VCXO. Features like fully integrated PLL1 and PLL2 loop filters, a high number of integrated LDOs, digital and analog delay, the flexibility to supply outputs with 3.3V, 2.5V and 1.8V as well as the option to generate multiple SYSREF domains simultaneously makes the device easy to use. Not limited to JESD204B applications each of the 17 outputs can be configured for traditional clocking systems.

The LMK04714-Q1 is a high performance clock conditioner with JEDEC JESD204B/C support for space applications. The 14 clock outputs from PLL2 can be configured to drive seven JESD204B/C converters or other logic devices using device and SYSREF clocks. SYSREF can be provided using both DC and AC coupling. Not limited to JESD204B/C applications, each of the 14 outputs can be individually configured as high-performance outputs for traditional clocking systems. This device can be configured for operation in dual PLL, single PLL, or clock distribution modes with or without SYSREF generation or reclocking. PLL2 may operate with either internal or external VCO. The high performance combined with features like the ability to trade off between power and performance, dual VCOs, dynamic digital delay, and holdover allows to provide flexible high performance clocking trees. The LMK04714-Q1 is a high performance clock conditioner with JEDEC JESD204B/C support for space applications. The 14 clock outputs from PLL2 can be configured to drive seven JESD204B/C converters or other logic devices using device and SYSREF clocks. SYSREF can be provided using both DC and AC coupling. Not limited to JESD204B/C applications, each of the 14 outputs can be individually configured as high-performance outputs for traditional clocking systems. This device can be configured for operation in dual PLL, single PLL, or clock distribution modes with or without SYSREF generation or reclocking. PLL2 may operate with either internal or external VCO. The high performance combined with features like the ability to trade off between power and performance, dual VCOs, dynamic digital delay, and holdover allows to provide flexible high performance clocking trees.