Sunday, May 28, 2006
Buffer/multiplexers boast best signal integrity
Four new current-mode logic signal-conditioning buffers and multiplexers feature 25ps of jitter for the best signal integrity in the industry.
National Semiconductor has introduced four new current-mode logic (CML) signal-conditioning buffers and multiplexers with 25ps of jitter for the best signal integrity in the industry. The family features integrated equalisers and programmable pre-emphasis for low-jitter and error-free transmission of multigigabit traffic over low-cost printed circuit board materials, copper cabling and fibre optics. The products' improved serial input/output performance, 6kV of ESD protection and added redundancy enhance ASIC and FPGA data-transmission performance.
The DS25BR400 and DS42BR400, configured as quad transceivers or eight-channel buffers, provide a high level of integration for high-speed data-transmission applications.
The DS25BR400 operates up to 2.5Gbit/s and the DS42BR400 operates up to 4.25Gbit/s.
The DS25MB200 and DS42MB200 are dual, signal-conditioning 2:1 multiplexers and 1:2 fan-out buffers (dual channel mux-buffers) designed for use in redundancy data paths.
National fabricates the buffer and multiplexer family on National's proprietary BiCMOS8 process technology in its South Portland, Maine, facility.
This state-of-the-art silicon germanium process enables the devices to achieve the lowest jitter and power performance in the industry.
Multi-gigabit applications often require signal-integrity features, such as equalisation and boost, for reliable data transfer between the source and destination.
With its industry-leading 25ps of jitter, National's new buffer and multiplexer family enables error-free transmission across more than 80in of FR-4 backplanes.
Backplane applications include XAUI and fibre channel, as well as the emerging standards for third-generation cellular basestations such as the common public radio interface (CPRI) and open basestation standard architecture initiative (OBSAI).
The buffer and multiplexers also work over up to 15m of PCI Express, SATA, CAT6/CAT7, DVI, HDMI and Infiniband cables.
An input equaliser that removes inter-symbol interference (ISI) jitter precedes each input buffer, compensating for up to 5dB of transmission loss, which results in reducing output jitter to as low as 25ps.
Also, the outputs feature adjustable de-emphasis to reduce deterministic jitter.
These features, coupled with typical edge rates as fast as 80ps, high channel-to-channel noise immunity, low output skew and industry-leading power at less than 140mW per channel, make the family of buffers and multiplexers an ideal signal-conditioning solution.
Available in a 60-pin LLP package, the DS42BR400 operates as a quad transceiver or an eight-channel buffer up to 4.25Gbit/s or down to 250Mbit/s.
The operating range enables use of the buffer in applications requiring both low- and high-frequency datarates.
The DS25BR400 has the same features and packaging as the DS42BR400, but features 250Mbit/s to 2.5Gbit/s datarate for 4x PCI-Express, CPRI and OBSAI applications.
Available in a 48-pin LLP package, the DS42MB200 is a dual, signal-conditioning 2:1 multiplexer and 1:2 fan-out buffer designed for use in backplane redundancy applications.
The DS42MB200 operates from 0.8 to 4.25Gbit/s, making it the ideal solution for adding redundancy to XAUI or fibre channel backplanes.
The DS25MB200 has the same features and packaging as the DS42MB200, but offers 0.8 to 2.5Gbit/s for 2x PCI-Express, CPRI and OBSAI backplanes.
National's four buffer/multiplexers are available now.
In 1000-unit quantities, the DS42BR400 is priced at $19.50, the DS25BR400 is $14.25, the DS42MB200 is $19.25 and the DS25MB200 is $10.50.
National Semiconductor has introduced four new current-mode logic (CML) signal-conditioning buffers and multiplexers with 25ps of jitter for the best signal integrity in the industry. The family features integrated equalisers and programmable pre-emphasis for low-jitter and error-free transmission of multigigabit traffic over low-cost printed circuit board materials, copper cabling and fibre optics. The products' improved serial input/output performance, 6kV of ESD protection and added redundancy enhance ASIC and FPGA data-transmission performance.
The DS25BR400 and DS42BR400, configured as quad transceivers or eight-channel buffers, provide a high level of integration for high-speed data-transmission applications.
The DS25BR400 operates up to 2.5Gbit/s and the DS42BR400 operates up to 4.25Gbit/s.
The DS25MB200 and DS42MB200 are dual, signal-conditioning 2:1 multiplexers and 1:2 fan-out buffers (dual channel mux-buffers) designed for use in redundancy data paths.
National fabricates the buffer and multiplexer family on National's proprietary BiCMOS8 process technology in its South Portland, Maine, facility.
This state-of-the-art silicon germanium process enables the devices to achieve the lowest jitter and power performance in the industry.
Multi-gigabit applications often require signal-integrity features, such as equalisation and boost, for reliable data transfer between the source and destination.
With its industry-leading 25ps of jitter, National's new buffer and multiplexer family enables error-free transmission across more than 80in of FR-4 backplanes.
Backplane applications include XAUI and fibre channel, as well as the emerging standards for third-generation cellular basestations such as the common public radio interface (CPRI) and open basestation standard architecture initiative (OBSAI).
The buffer and multiplexers also work over up to 15m of PCI Express, SATA, CAT6/CAT7, DVI, HDMI and Infiniband cables.
An input equaliser that removes inter-symbol interference (ISI) jitter precedes each input buffer, compensating for up to 5dB of transmission loss, which results in reducing output jitter to as low as 25ps.
Also, the outputs feature adjustable de-emphasis to reduce deterministic jitter.
These features, coupled with typical edge rates as fast as 80ps, high channel-to-channel noise immunity, low output skew and industry-leading power at less than 140mW per channel, make the family of buffers and multiplexers an ideal signal-conditioning solution.
Available in a 60-pin LLP package, the DS42BR400 operates as a quad transceiver or an eight-channel buffer up to 4.25Gbit/s or down to 250Mbit/s.
The operating range enables use of the buffer in applications requiring both low- and high-frequency datarates.
The DS25BR400 has the same features and packaging as the DS42BR400, but features 250Mbit/s to 2.5Gbit/s datarate for 4x PCI-Express, CPRI and OBSAI applications.
Available in a 48-pin LLP package, the DS42MB200 is a dual, signal-conditioning 2:1 multiplexer and 1:2 fan-out buffer designed for use in backplane redundancy applications.
The DS42MB200 operates from 0.8 to 4.25Gbit/s, making it the ideal solution for adding redundancy to XAUI or fibre channel backplanes.
The DS25MB200 has the same features and packaging as the DS42MB200, but offers 0.8 to 2.5Gbit/s for 2x PCI-Express, CPRI and OBSAI backplanes.
National's four buffer/multiplexers are available now.
In 1000-unit quantities, the DS42BR400 is priced at $19.50, the DS25BR400 is $14.25, the DS42MB200 is $19.25 and the DS25MB200 is $10.50.
# posted by Swathi @ 10:04 PM
Bipolar amplifier cover all bands
Miteq has released a new 34 page catalogue of its complete bipolar amplifier line up to 3GHz.
Miteq has just released a new 34 page catalogue of its complete bipolar amplifier line up to 3GHz.
The catalogue features low noise, medium power, wideband, MRI, cellular/PCN and Inmarsat bands.
Typical amplifier performance curves are shown, including outline drawings and explanation of specification definitions.
Miteq has just released a new 34 page catalogue of its complete bipolar amplifier line up to 3GHz.
The catalogue features low noise, medium power, wideband, MRI, cellular/PCN and Inmarsat bands.
Typical amplifier performance curves are shown, including outline drawings and explanation of specification definitions.
# posted by Swathi @ 10:03 PM
Front end is comprehensive video digitiser
A triple-channel 8bit video analogue front end incorporates all the functions required to digitise YPbPr video signals and RGB graphics signals from DVD players, VCRs, set-top boxes and PCs.
A triple-channel, video analogue front end IC from Intersil provides the industry's highest speeds along with continuously controlled offset voltages, so designers do not have to calibrate offset error out of their system on an AFE-by-AFE basis. The device's digital phase locked loop (DPLL) even includes headswitching support, enabling high-performance images even under the worst-case scenario of digitising inputs from a high-definition digital VCR playing back a standard VHS tape. Intersil's ISL98001 is a triple-channel, 8bit video analogue front end (AFE) that incorporates all of the functions required to digitise YPbPr (component) video signals and RGB (red, green, blue) graphics signals from DVD players, VCRs, set-top boxes and personal computers.
It is available in five different speeds ranging from 140 to 275Mpixel/s, providing a solution for every video resolution.
The device delivers optimal performance for hi-end televisions, monitors, home theatres, business projectors, and KVM (keyboard, video, mouse) products.
The ISL98001's fast conversion rates support HDTV resolution up to 1080p and computer monitor resolutions up to QXGA.
The programmable input bandwidth incorporated in the AFE ensures sharp, clean images at all resolutions.
In addition, the ISL98001 delivers very low jitter, high bandwidth and excellent linearity.
Its automatic black level compensation ensures outstanding black level performance for even the lowest-cost home theatre systems, delivering excellent colour reproduction even with temperature variations.
One of the most innovative features of the ISL98001 is its digital phase locked loop technology, which allows Intersil to provide a maximum jitter of 450ps (250ps typical) peak-to-peak, the best in the industry and a necessity for UXGA and higher PC resolutions.
A 'peaking' function compensates for input degradation in instances of low-channel bandwidth, and integrated HSYNC and SOG signal processing eliminates the need for external sync slicers, sync separators, Schmitt triggers and noise filters.
The ISL98001 is available now in 128-lead MQFP packages.
A triple-channel, video analogue front end IC from Intersil provides the industry's highest speeds along with continuously controlled offset voltages, so designers do not have to calibrate offset error out of their system on an AFE-by-AFE basis. The device's digital phase locked loop (DPLL) even includes headswitching support, enabling high-performance images even under the worst-case scenario of digitising inputs from a high-definition digital VCR playing back a standard VHS tape. Intersil's ISL98001 is a triple-channel, 8bit video analogue front end (AFE) that incorporates all of the functions required to digitise YPbPr (component) video signals and RGB (red, green, blue) graphics signals from DVD players, VCRs, set-top boxes and personal computers.
It is available in five different speeds ranging from 140 to 275Mpixel/s, providing a solution for every video resolution.
The device delivers optimal performance for hi-end televisions, monitors, home theatres, business projectors, and KVM (keyboard, video, mouse) products.
The ISL98001's fast conversion rates support HDTV resolution up to 1080p and computer monitor resolutions up to QXGA.
The programmable input bandwidth incorporated in the AFE ensures sharp, clean images at all resolutions.
In addition, the ISL98001 delivers very low jitter, high bandwidth and excellent linearity.
Its automatic black level compensation ensures outstanding black level performance for even the lowest-cost home theatre systems, delivering excellent colour reproduction even with temperature variations.
One of the most innovative features of the ISL98001 is its digital phase locked loop technology, which allows Intersil to provide a maximum jitter of 450ps (250ps typical) peak-to-peak, the best in the industry and a necessity for UXGA and higher PC resolutions.
A 'peaking' function compensates for input degradation in instances of low-channel bandwidth, and integrated HSYNC and SOG signal processing eliminates the need for external sync slicers, sync separators, Schmitt triggers and noise filters.
The ISL98001 is available now in 128-lead MQFP packages.
# posted by Swathi @ 10:02 PM
A/D convertor claims biggest bandwidth
A 14bit 155Msample/s analogue-to-digital convertor claims an industry-leading full-power bandwidth of 1.1GHz.
National Semiconductor has introduced a 14bit 155Msample/s analogue-to-digital convertor (ADC) that offers an industry-leading full-power bandwidth of 1.1GHz. The ADC14155 allows digitisation of very high frequency signals, enabling high intermediate-frequency (IF) architectures in wireless communication applications. The ADC14155's high bandwidth performance allows it to digitise the first IF, eliminating the need for the second IF stage.
This helps reduce component count and system power consumption, while also improving system reliability.
The ADC14155 is well-suited for all applications where high-bandwidth ADCs with excellent dynamic performance are required, such as 3G wireless basestations and test equipment.
'National is focused on providing our customers with distinct performance benefits when using our convertors', said Antonio Visconti, Product Line Director of National Semiconductor's Data Conversion Division.
'For example, the ADC14155's 1.1GHz full-power bandwidth is 72% higher than the closest competitor in the 14bit space and that advantage enables system designers to develop breakthrough architectures for wireless communication applications'.
In coming months, National plans to expand its high-speed 14bit portfolio with additional low-power, high-performance ADCs in multiple speed grades and configurations that address the requirements of a broad range of applications.
The ADC14155 is the first in a new family of high-speed 14bit ADCs that offers the industry's highest performance with low power consumption, as well as parallel CMOS, parallel low-voltage differential signalling (LVDS) and serial LVDS output options.
National will expand this 14bit family of ADCs to include products ranging from 80 to 155Msample/s, with one- and two-channel versions, and CMOS and LVDS outputs.
The ADC14155 also will be available with double datarate, parallel LVDS outputs.
These ADCs will be introduced throughout the summer and fall of this year.
The ADC14155 provides a dynamic performance of 85dB spurious free dynamic range (SFDR) and a 72dB signal-to-noise ratio (SNR) at an input frequency of 70MHz, which is commonly used in communications receivers.
The low-jitter front end on the ADC14155 enables the industry's best performance of 72dB SFDR and 68dB SNR at an input frequency as high as 420MHz.
The ADC14155 operates on a 3.3V supply while consuming 980mW (typical), with a power-down feature to reduce power consumption to 5mW.
A separate +1.8V supply for the digital interface allows low-power operation with reduced noise.
The ADC14155 is available in a 48-pin LLP package.
National Semiconductor has introduced a 14bit 155Msample/s analogue-to-digital convertor (ADC) that offers an industry-leading full-power bandwidth of 1.1GHz. The ADC14155 allows digitisation of very high frequency signals, enabling high intermediate-frequency (IF) architectures in wireless communication applications. The ADC14155's high bandwidth performance allows it to digitise the first IF, eliminating the need for the second IF stage.
This helps reduce component count and system power consumption, while also improving system reliability.
The ADC14155 is well-suited for all applications where high-bandwidth ADCs with excellent dynamic performance are required, such as 3G wireless basestations and test equipment.
'National is focused on providing our customers with distinct performance benefits when using our convertors', said Antonio Visconti, Product Line Director of National Semiconductor's Data Conversion Division.
'For example, the ADC14155's 1.1GHz full-power bandwidth is 72% higher than the closest competitor in the 14bit space and that advantage enables system designers to develop breakthrough architectures for wireless communication applications'.
In coming months, National plans to expand its high-speed 14bit portfolio with additional low-power, high-performance ADCs in multiple speed grades and configurations that address the requirements of a broad range of applications.
The ADC14155 is the first in a new family of high-speed 14bit ADCs that offers the industry's highest performance with low power consumption, as well as parallel CMOS, parallel low-voltage differential signalling (LVDS) and serial LVDS output options.
National will expand this 14bit family of ADCs to include products ranging from 80 to 155Msample/s, with one- and two-channel versions, and CMOS and LVDS outputs.
The ADC14155 also will be available with double datarate, parallel LVDS outputs.
These ADCs will be introduced throughout the summer and fall of this year.
The ADC14155 provides a dynamic performance of 85dB spurious free dynamic range (SFDR) and a 72dB signal-to-noise ratio (SNR) at an input frequency of 70MHz, which is commonly used in communications receivers.
The low-jitter front end on the ADC14155 enables the industry's best performance of 72dB SFDR and 68dB SNR at an input frequency as high as 420MHz.
The ADC14155 operates on a 3.3V supply while consuming 980mW (typical), with a power-down feature to reduce power consumption to 5mW.
A separate +1.8V supply for the digital interface allows low-power operation with reduced noise.
The ADC14155 is available in a 48-pin LLP package.
# posted by Swathi @ 10:01 PM
Dual and quad op amps shrink to DFN
The LT6001 and LT6002 are claimed to be the industry's first 1.8V dual and quad operational amplifiers available in tiny DFN packages.
Linear Technology has introduced the LT6001 and LT6002, the industry's first 1.8V dual and quad operational amplifiers available in tiny DFN packages. These micropower devices draw only 13uA per amplifier and have excellent performance characteristics. Maximum input offset voltage is 500uV at 25C with a maximum drift of 5uV/C over temperature.
Inputs and outputs feature rail-to-rail operation.
This combination of low supply voltage, low current consumption and excellent DC specifications in a tiny DFN package make these parts ideal for handheld and battery-powered applications.
For even greater power savings, the dual LT6001 in 3 x 3mm package also includes a shutdown pin, allowing current consumption to drop to a maximum of 1.5uA when not in use.
'The LT600x family pushes the envelope for combining precision, low power and high density', says Erik Soule, General Manager of Linear Technology's signal conditioning product group.
'This feature set is highly desirable in portable medical and industrial instruments'.
The LT6001 and LT6002 are available now with prices starting from $1.25 and $2.00 each in 1000-piece quantities.
Linear Technology has introduced the LT6001 and LT6002, the industry's first 1.8V dual and quad operational amplifiers available in tiny DFN packages. These micropower devices draw only 13uA per amplifier and have excellent performance characteristics. Maximum input offset voltage is 500uV at 25C with a maximum drift of 5uV/C over temperature.
Inputs and outputs feature rail-to-rail operation.
This combination of low supply voltage, low current consumption and excellent DC specifications in a tiny DFN package make these parts ideal for handheld and battery-powered applications.
For even greater power savings, the dual LT6001 in 3 x 3mm package also includes a shutdown pin, allowing current consumption to drop to a maximum of 1.5uA when not in use.
'The LT600x family pushes the envelope for combining precision, low power and high density', says Erik Soule, General Manager of Linear Technology's signal conditioning product group.
'This feature set is highly desirable in portable medical and industrial instruments'.
The LT6001 and LT6002 are available now with prices starting from $1.25 and $2.00 each in 1000-piece quantities.
# posted by Swathi @ 10:00 PM
