Crystek launches 2.5GHz phase locked clock source

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500 (.pdf).

The resulting source features -105dBc/Hz phase noise at 10KHz offset and a noise floor of -167dBc/Hz.

Crystek designed the module using proprietary circuitry and SAW (surface acoustic wave) resonator technology to provide ultra-low jitter/phase noise performance with true SineWave output.

CRFS75-2500
Frequency (MHz)
2500.000
Package 0.75 x 0.75 in
SMD
Supply (VDC) 5.00
Output SINEWAVE
Stability ppm (°C)
±25 (-20 to 70)
Data Sheet CRFS75-2500.pdf
Notes
  • Phase Locked

 

david manners

Crystek launches 2.5GHz phase locked clock source

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500 (.pdf).

The resulting source features -105dBc/Hz phase noise at 10KHz offset and a noise floor of -167dBc/Hz.

Crystek designed the module using proprietary circuitry and SAW (surface acoustic wave) resonator technology to provide ultra-low jitter/phase noise performance with true SineWave output.

CRFS75-2500
Frequency (MHz)
2500.000
Package 0.75 x 0.75 in
SMD
Supply (VDC) 5.00
Output SINEWAVE
Stability ppm (°C)
±25 (-20 to 70)
Data Sheet CRFS75-2500.pdf
Notes
  • Phase Locked

 

david manners

Boost converter will deliver 15V from 500mV

Linear Tech LTC3121 boost converter

Linear Tech LTC3121 boost converter

Linear Tech has introduced a boost converter that starts from 1.8V minimum, but will run with inputs from 0.5-5.5V.

It is synchronous, with 1.5A switches, delivering up to 400mA at 12V from 5V.

“Its 1.5A current limit makes it well suited for input current constrained applications such as PCI Express while minimizing the size of the required externals,” said the firm.

Called LTC3121, it has an output disconnect to prevent the battery bleeding through the chip on shut-down (with <1µA quiescent from battery), and in normal operation it stays in regulation when the input voltage exceeds the output voltage.

Pin-selectable burst mode which drops quiescent current to 25µA, or constant PWM mode keeps noise to a minimum.

For compact dc-dc converters, it comes in a 3 x 4mm DFN-12 thermally-enhanced package switches at 3MHz for small passive components, or it can run as slow as 100kHz.

Switch on-resistances of 121mΩ (n-channel) and 188mΩ (p-channel) contribute to the 95% peak efficiency.

Additional features include external synchronisation, soft start, output over-voltage protection and short-circuit protection.

The industrial-grade LTC3121IDE is guaranteed to operate over -40°C to 125°C operating junction temperature.

steve bush

Boost converter will deliver 15V from 500mV

Linear Tech LTC3121 boost converter

Linear Tech LTC3121 boost converter

Linear Tech has introduced a boost converter that starts from 1.8V minimum, but will run with inputs from 0.5-5.5V.

It is synchronous, with 1.5A switches, delivering up to 400mA at 12V from 5V.

“Its 1.5A current limit makes it well suited for input current constrained applications such as PCI Express while minimizing the size of the required externals,” said the firm.

Called LTC3121, it has an output disconnect to prevent the battery bleeding through the chip on shut-down (with <1µA quiescent from battery), and in normal operation it stays in regulation when the input voltage exceeds the output voltage.

Pin-selectable burst mode which drops quiescent current to 25µA, or constant PWM mode keeps noise to a minimum.

For compact dc-dc converters, it comes in a 3 x 4mm DFN-12 thermally-enhanced package switches at 3MHz for small passive components, or it can run as slow as 100kHz.

Switch on-resistances of 121mΩ (n-channel) and 188mΩ (p-channel) contribute to the 95% peak efficiency.

Additional features include external synchronisation, soft start, output over-voltage protection and short-circuit protection.

The industrial-grade LTC3121IDE is guaranteed to operate over -40°C to 125°C operating junction temperature.

steve bush

Boost converter will deliver 15V from 500mV

Linear Tech LTC3121 boost converter

Linear Tech LTC3121 boost converter

Linear Tech has introduced a boost converter that starts from 1.8V minimum, but will run with inputs from 0.5-5.5V.

It is synchronous, with 1.5A switches, delivering up to 400mA at 12V from 5V.

“Its 1.5A current limit makes it well suited for input current constrained applications such as PCI Express while minimizing the size of the required externals,” said the firm.

Called LTC3121, it has an output disconnect to prevent the battery bleeding through the chip on shut-down (with <1µA quiescent from battery), and in normal operation it stays in regulation when the input voltage exceeds the output voltage.

Pin-selectable burst mode which drops quiescent current to 25µA, or constant PWM mode keeps noise to a minimum.

For compact dc-dc converters, it comes in a 3 x 4mm DFN-12 thermally-enhanced package switches at 3MHz for small passive components, or it can run as slow as 100kHz.

Switch on-resistances of 121mΩ (n-channel) and 188mΩ (p-channel) contribute to the 95% peak efficiency.

Additional features include external synchronisation, soft start, output over-voltage protection and short-circuit protection.

The industrial-grade LTC3121IDE is guaranteed to operate over -40°C to 125°C operating junction temperature.

steve bush

Precision and no drift from ADI’s 55V op-amp

Analog Devices ADA4522 - a 55V, low-noise, zero-drift, precision op-amp

Analog Devices ADA4522 – a 55V, low-noise, zero-drift, precision op-amp

Analog Devices has introduced a 55V, low-noise, zero-drift, precision op-amp that includes electro-magnetic interference (EMI) filtering and needs no calibration circuitry.

Called ADA4522-2, the dual channel device is the first of a series.

Operation is over ±2.25V to ±27.5V, or 4.5 to 55V single supply, with the most negative rail included in the input range. Supply current per amplifier is a creditable 830uA. Output is rail-to-rail.

The important figures are:

  • noise: 5.8nV/√Hz (typ) @ 1kHz
  • 5uV max offset @ 25ºC
  • 22nV/ºC max offset voltage drift
  • 2.7MHz gain-bandwidth product.

Chopper stabilisation accounts for some of those parameters, with chopping at 1.5MHz for wide closed-loop bandwidth and easy filtering.

Instrumentation applications include front ends for: LCR meter, megohmmeter, load cell, bridge transducers, magnetic force balance scales, current shunts, thermocouples, RTD sensors and PLC input and output amplifiers

Electronic loads, power supplies, motor control and offset correction in composite amplifiers are possible end applications.

ADI has produced an informative white paper on its chopper-stabilising technique.

Packaging is 8pin SOIC or MSOP, and a 14 pin version, probably a quad, is due out in September in TSSOP or SOIC-14.

steve bush

Precision and no drift from ADI’s 55V op-amp

Analog Devices ADA4522 - a 55V, low-noise, zero-drift, precision op-amp

Analog Devices ADA4522 – a 55V, low-noise, zero-drift, precision op-amp

Analog Devices has introduced a 55V, low-noise, zero-drift, precision op-amp that includes electro-magnetic interference (EMI) filtering and needs no calibration circuitry.

Called ADA4522-2, the dual channel device is the first of a series.

Operation is over ±2.25V to ±27.5V, or 4.5 to 55V single supply, with the most negative rail included in the input range. Supply current per amplifier is a creditable 830uA. Output is rail-to-rail.

The important figures are:

  • noise: 5.8nV/√Hz (typ) @ 1kHz
  • 5uV max offset @ 25ºC
  • 22nV/ºC max offset voltage drift
  • 2.7MHz gain-bandwidth product.

Chopper stabilisation accounts for some of those parameters, with chopping at 1.5MHz for wide closed-loop bandwidth and easy filtering.

Instrumentation applications include front ends for: LCR meter, megohmmeter, load cell, bridge transducers, magnetic force balance scales, current shunts, thermocouples, RTD sensors and PLC input and output amplifiers

Electronic loads, power supplies, motor control and offset correction in composite amplifiers are possible end applications.

ADI has produced an informative white paper on its chopper-stabilising technique.

Packaging is 8pin SOIC or MSOP, and a 14 pin version, probably a quad, is due out in September in TSSOP or SOIC-14.

steve bush

Precision and no drift from ADI’s 55V op-amp

Analog Devices ADA4522 - a 55V, low-noise, zero-drift, precision op-amp

Analog Devices ADA4522 – a 55V, low-noise, zero-drift, precision op-amp

Analog Devices has introduced a 55V, low-noise, zero-drift, precision op-amp that includes electro-magnetic interference (EMI) filtering and needs no calibration circuitry.

Called ADA4522-2, the dual channel device is the first of a series.

Operation is over ±2.25V to ±27.5V, or 4.5 to 55V single supply, with the most negative rail included in the input range. Supply current per amplifier is a creditable 830uA. Output is rail-to-rail.

The important figures are:

  • noise: 5.8nV/√Hz (typ) @ 1kHz
  • 5uV max offset @ 25ºC
  • 22nV/ºC max offset voltage drift
  • 2.7MHz gain-bandwidth product.

Chopper stabilisation accounts for some of those parameters, with chopping at 1.5MHz for wide closed-loop bandwidth and easy filtering.

Instrumentation applications include front ends for: LCR meter, megohmmeter, load cell, bridge transducers, magnetic force balance scales, current shunts, thermocouples, RTD sensors and PLC input and output amplifiers

Electronic loads, power supplies, motor control and offset correction in composite amplifiers are possible end applications.

ADI has produced an informative white paper on its chopper-stabilising technique.

Packaging is 8pin SOIC or MSOP, and a 14 pin version, probably a quad, is due out in September in TSSOP or SOIC-14.

steve bush

IDF: Microchip adds authentication security to IoT devices

Microchip will implement IC authentication security developed by Intel into its chips for IoT applications

Microchip will implement IC authentication security developed by Intel into its chips for IoT applications

Microchip Technology says it will implement IC authentication security developed by Intel into its chips for IoT applications.

The whole area of IoT where devices such as smart meters and health sensors are connected to the internet to transfer data has raised the issue of data security.

Many chip firms are implementing security techniques such as authentication and processor partitioning into their devices.

Intel’s device authentication technology called Enhanced Privacy ID is intended to allow a service provider when setting up a connection to an IoT device to verify that an end user is authorised to access the service.

For the user of the IoT device the EPID protocol should mean they do not need to reveal their identity to an internet service provider.

According to Lorie Wigle, general manager of Internet of Things Security at Intel, the technology will mean users of Microchip’s devices will be able to “maintain end-to-end security and privacy in their IoT products and services, which helps them to protect data from device to cloud, minimizes unauthorized access of endpoints and gateways, and will promote a common security framework for IoT platforms.”

At the Intel Developer Forum this week in San Francisco, the Intel EPID protocol was demonstrated running on Microchip’s IoT Security Platform (pictured)

“Microchip has long recognised the importance of security in IoT applications,” said Ian Harris, vice president of Microchip’s Computing Products Group.

It is a group signature scheme that allows a platform to sign objects without uniquely identifying the platform or linking different signatures. Instead, each signer belongs to a ‘group’, and verifiers use the group’s public key to verify signatures.

EPID supports two modes of signatures:

  • Fully anonymous: an EPID verifier cannot associate a given signature with a particular member of the group.
  • Pseudonymous: an EPID verifier has the ability to determine whether it has verified the platform previously.

 

Richard Wilson

IDF: Microchip adds authentication security to IoT devices

Microchip will implement IC authentication security developed by Intel into its chips for IoT applications

Microchip will implement IC authentication security developed by Intel into its chips for IoT applications

Microchip Technology says it will implement IC authentication security developed by Intel into its chips for IoT applications.

The whole area of IoT where devices such as smart meters and health sensors are connected to the internet to transfer data has raised the issue of data security.

Many chip firms are implementing security techniques such as authentication and processor partitioning into their devices.

Intel’s device authentication technology called Enhanced Privacy ID is intended to allow a service provider when setting up a connection to an IoT device to verify that an end user is authorised to access the service.

For the user of the IoT device the EPID protocol should mean they do not need to reveal their identity to an internet service provider.

According to Lorie Wigle, general manager of Internet of Things Security at Intel, the technology will mean users of Microchip’s devices will be able to “maintain end-to-end security and privacy in their IoT products and services, which helps them to protect data from device to cloud, minimizes unauthorized access of endpoints and gateways, and will promote a common security framework for IoT platforms.”

At the Intel Developer Forum this week in San Francisco, the Intel EPID protocol was demonstrated running on Microchip’s IoT Security Platform (pictured)

“Microchip has long recognised the importance of security in IoT applications,” said Ian Harris, vice president of Microchip’s Computing Products Group.

It is a group signature scheme that allows a platform to sign objects without uniquely identifying the platform or linking different signatures. Instead, each signer belongs to a ‘group’, and verifiers use the group’s public key to verify signatures.

EPID supports two modes of signatures:

  • Fully anonymous: an EPID verifier cannot associate a given signature with a particular member of the group.
  • Pseudonymous: an EPID verifier has the ability to determine whether it has verified the platform previously.

 

Richard Wilson