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TDK announces world’s first MIPI standar
Portable SSD T7 Touch
 
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APAR AR236.B & AR232.B radio loggers
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Intel® Neural Compute Stick 2
 
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Quartz Crystals and Quartz Crystal Oscillators Ansen

Quartz Crystals and Quartz Crystal Oscillators Ansen

Without crystal oscillators, there would be no wireless communication, GPS receivers or Ethernet. Therefore, we are expanding the portfolio of suppliers with the renowned ANSEN manufacturer. Although new technologies such as MEMS oscillators exist, crystal oscillators remain the dominant source of accurate and stable frequency.

Required Frequency Stability for Different Applications ● USB low speed (1,5Mb/s) ±1.5% (15 000ppm)
● USB full speed (12Mb/s) ±0.25% (2 500ppm)
● USB high speed (480Mb/s) ±500ppm
● Ethernet 10/100/1000Mb/s ±100ppm (±50ppm at 25°C, ±50ppm for other influences)
● Wi-Fi 802.11 a/b/g/n, Bluetooth: 20ppm

With the increasing demand for higher data rates and more efficient use of radio spectrum, the requirements for frequency stability are also increasing. For example, a base station for mobile phones needs 50ppb (part per billion) accuracy.

Oscillators in microcontrollers

Current microcontrollers have built-in factory calibrated RC oscillator and oscillator for external quartz crystal or ceramic resonator.

Internal RC Oscillator

16MHz internal RC oscillator in modern microcontrollers, like STM32L4 family, is factory calibrated and can have total accuracy-2% to 1.5% (-20 000ppm up to 15 000ppm) in the temperature range -40 to 85°C. Drift over time is not specified.

Oscillator with Ceramic Resonator

● Ceramic resonator 12MHz, 3,2x1,3x0,7mm, Murata CSTNE12M0GH5L000R0
● Ambient Operating Temperature Range: -40...85°C
● Frequency Tolerance at 25°C: ±0.07%=±700ppm
● Frequency Stability over Temperature: ±0.11%=±1100ppm
● Aging: ±0.07%/10 years at 25°C

Total frequency deviation for 10 years: 700ppm+1100ppm+700ppm=2500ppm

Oscillator with Crystal

● Standard Ansen crystal 12MHz, 3.2x2.5x0.75mm: ASX3F-12M-FE180E5
● Operating Temperature Range: -40...85°C
● Frequency Tolerance (25°C): ±30ppm
● Frequency Stability over Temperature: ±30ppm
● Aging: ±3ppm/year
● Total frequency deviation for 10 years: 30ppm+30ppm+30ppm=90ppm

Quartz crystal oscillator offers the best accuracy. Practical limit for standard crystal oscillator (XO) is ±10ppm including frequency tolerance at 25°C, frequency stability over temperature, supply voltage change, change of shock and vibration and 1st year aging.

Important Crystal Parameters

Nominal Frequency and Load Capacitance (CL)

The most used topology is Pierce Oscillator. The crystal acts as an inductor.


The load capacity CL closes the parallel resonant circuit. The CL value is specified by the crystal manufacturer. To be accurate, the oscillator circuit must have the same load capacity to which the crystal has been set.

Equivalent Series Resistance (ESR)

The feedback resistor transforms the logic CMOS gate (inverter) to a linear amplifier with a transconductance Gm = - di/du, thus the output current of the amplifier is proportional to the input voltage.

The amplifier must have sufficient transconductance to compensate for losses in the oscillation loop (ESR and current flowing through the CL1, CL2, and the parasitic capacities of the leads to GND) and provide energy to build-up oscillation. Typical Gm is mA/V for MHz range crystals and uA/V for 32.768KHz crystals.

For reliable operation, Gm > 5gm_crit is recommended.

gm_crit = 4*ESR*(2πF)^2*(C0 + CL)^2 where

● ESR is the equivalent series resistance
● C0 is the crystal shunt capacitance
● CL is the crystal nominal load capacitance
● F is the crystal nominal oscillation frequency

Drive Level

The recommended or maximum drive level is specified by the crystal manufacturer, usually in uW. Exceeding this value may shorten the life of the crystal or cause damage by excessive mechanical vibration. Ansen recommends drive level of 100uW. Lower drive level can prevent oscillations, the higher level increases the resonant frequency of the crystals with the AT cut.

You can find more information in STM AN2867 and John R. Vig - Quartz Crystal Resonators and Oscillators For Frequency Control and Timing Applications - A Tutorial.

Why have we decided for Ansen?

Ansen is a leading manufacturer of frequency control products. Their offer includes quartz crystals, crystal oscillators, and ceramic resonators. Through continuous technology breakthrough and high-precision manufacturing technology, Ansen products are not only utilized in consumer electronics and industrial sectors but also designed in automotive fields.

Ansen offers:
1. management system certified to the international ISO 9001, ISO 14001 and IECQ QC 080000 standards
2. excellent reliability, solderability, thermal hysteresis, vibration resistance, and shock resistance
3. low aging and extended temperature range
4. high-precision manufacturing technology
5. automotive-grade products with AEC-Q200 compliant
6. all products are complied with RoHS and REACH request

We included 29 Ansen crystals in HC-49/US (SMD and TH versions) and 3.2x2.5mm SMD packages into our stock offer. We expect the first delivery at the end of June 2019. We will gradually expand the offer according to your requirements. All customers logged in to our e-shop can view the prices of crystals. All customers logged in to our e-shop can view the prices of crystals.

For further information about Ansen products, please do not hesitate to contact us at ansen@soselectronic.com 

2019080805 / 26.08.2019 / Various / SOS electronic s.r.o. /

The world’s first GSM/NB2 dual-mode module 
The world’s first GSM/NB2 dual-mode module
Quectel Wireless Solutions, the leading global supplier of Internet of Things (IoT) Modules, launched its first LTE Cat NB2/GSM dual-mode module BC92, which supports switchover between GSM and NB-IoT networks and ensures utilizing network coverage of both technologies.
.....
Get a lot of connectivity for the buck
WizFi360 is fast, affordable and simple plug&play WiFi module WIZnet designed for various IoT applications, mobile and wearable devices.
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Get a lot of connectivity for the buck
Infrared cameras seeing 4x more details than their predecessors
Infrared cameras seeing 4x more details than their predecessors
The new TG267 and TG297 infrared cameras significantly accelerate the thermal diagnostics process. The features like 160x120px resolution, MSX combined image, new laser, larger display or easy data transfer to mobile devices are now available for the better price than you would ever expect.
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FIS5084 Easily Detects HFC Leakage
A brief guide on how the FIS module for refrigerant leads detection works, a summary of its features, and technical details you cannot find in a publicly available datasheet.
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FIS5084 Easily Detects HFC Leakage
Robust enclosures with elegant design
Robust enclosures with elegant design
The new Hammond 1557 Series offers a surprisingly attractive industrial waterproof enclosure solution with three mounting options, for different control panels or monitoring units.
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3 reasons for the TRI Series DC/DC converters
Reinforced insulation system, high common-mode transient immunity, and compact DIP-24 package. With the latest, IT security certificates, the TRACO POWER TRI Series is the perfect choice for demanding applications in industrial, transportation and instrumentation sectors.
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3 reasons for the TRI Series DC/DC converters
Smart dual Nano-SIM card socket
Smart dual Nano-SIM card socket
Two SIM cards give us the choice of an operator with better coverage as well as the possibility to use 4G and LPWA technologies. Attend series 115S holder for 2 nano-SIM cards gives several proven benefits in comparison with the competition.
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Kontakt Trio - set for perfect contact treatment
A strong trio of Kontakt Chemie sprays for quality and reliable contacts, in a discounted package.
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Kontakt Trio - set for perfect contact treatment
Get the best results with MEC switches
Get the best results with MEC switches
Whether you choose the current MEC button generation 5E/5G or the previous one, 3A/3C/3E/3F, it’s always gonna be a great decision. MEC is a guarantee of reliability, so both generations have their place on the market.
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Quartz Crystals and Quartz Crystal Oscillators Ansen
Without crystal oscillators, there would be no wireless communication, GPS receivers or Ethernet. Therefore, we are expanding the portfolio of suppliers with the renowned ANSEN manufacturer. Although new technologies such as MEMS oscillators exist, crystal oscillators remain the dominant source of accurate and stable frequency.
.....
Quartz Crystals and Quartz Crystal Oscillators Ansen
6x6 new enclosures for your devices
6x6 new enclosures for your devices
If you haven't found your "size" between Hammond Series 1554 or 1555 industrial enclosures, you'll very likely find it now. Hammond offers 6 new sizes and 36 different combinations of popular plastic enclosures.
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EA PlugS - small OLED display with added value
Graphics feature support, USB interface, capacitive touch panel, aesthetic glass frame and easy to install - all the pluses for smooth and fast application development.
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EA PlugS - small OLED display with added value
MSM LA Series – Vandal resistant latching switches
MSM LA Series – Vandal resistant latching switches
The range of vandal resistant momentary push-button switches is relatively wide but there are fewer latching switches. We extended our stock range with basic models of vandal resistant latching switches from the MSM LA 19 Series from SCHURTER.
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Apacer Brings New Technologies to SSD
New Apacer’s SSDs improve already high data integrity, longevity, security, and survivability. Let’s have a look at how they did it.
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Apacer Brings New Technologies to SSD
Get more space on PCB with TEL 10WI
Get more space on PCB with TEL 10WI
TRACO POWER 10 Watt DC/DC converter for space-limited applications.
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Artificial Intelligence on the Edge of Your Network
This is not the topic of the future; with AAEON hardware you can handle the deployment of artificial intelligence now. Read the article to find out how it all works and what you need for that.
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Artificial Intelligence on the Edge of Your Network
More than 100 new active tips for each soldering joint
More than 100 new active tips for each soldering joint
The largest Weller product range expansion includes three soldering handles and more than 100 tips with active heating, suitable for microscopic work to solder coolers and LEDs on PCB with aluminum base.
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Oscilloscopes that will surprise you with superior features already in the basic class
The vast array of useful features and the concept of future growth; this is the Rohde&Schwarz RTB 200x series of oscilloscopes.
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Oscilloscopes that will surprise you with superior features already in the basic class
Company of the week

ICP Deutschland GmbH
Interesting video


How Do You Minimize Bubbles in a Two Part Epoxy System?


Adafruit Partners with Panasonic


Computer-On-Modules are world-leading platforms for embedded system designs


Ghostbuster's Theme on eight floppy drives


Darude - Sandstorm on Eight Floppy Drives
Address Book


ICP Deutschland GmbH


Yamaichi Electronics USA Inc.


SEMTECH


Microchip Technology Inc.


EM Microelectronic


Murata Power Solutions Inc


Advantech


Keysight Technologies


XP Power Limited


Fischer Connectors SA


Nicomatic


TE Connectivity


akYtec GmbH


SOS electronic s.r.o.


MARVELL


Taiwan Semiconductor


ROHM Semiconductor


Pickering Interfaces Ltd


ANRITSU


Mouser Electronics


NEXPERIA


RS Components GmbH


Transfer Multisort Elektronik Sp. z o.o.


SECTRON


FAULHABER


Willow Technologies


ABB


ACS Motion Control


Visual Communications Company, LLC


Sonderhoff Holding GmbH
Calendary
DistribuTECH, 28.1.-30.1.2020, San Antonio, TX
APEX EXPO 2020, San Diego, 4.2.-6.2.2020
embedded world 2020, Nuremberg, 25.2.-27.2.2020
BATTERY JAPAN, Tokyo, 26.2.-28.2.2020
Light + Building, Frankfurt am Main, 8.3.-13.3.2020
AMPER 2020, Brno, CZ, 17.3.-20.3.2020
SECUTECH 2020, Taipei, 22.4.-24.4.2020
PCIM Europe, Nuremberg, 5.5.-7.5.2020
SMTconnect 2020, Nuremberg, 5.5.-7.5.2020
LED Expo Mumbai 2020, 7.5.-9.5.2020
SPS Italia, Fiere di Parma, 26.5.-28.5.2020
Wire & Cable Guangzhou, China, 27.5.-29.5.2020
Automechanika Dubai, 7.6.-9.7.2020
hardware+tools, Dubai, UAE, 7.6.-9.6.2020
ELEKTRO 2020, MOSCOW, Russia, 8.6.-11.6.2020
PCIM Asia, Shanghai, 1.7.-3.7.2020
SPS Automation Middle East, Dubai, 20.8.-21.8.2020
Intersec Buenos Aires, 26.8.-28.8.2020
Automechanika Frankfurt, DE, 8.9.-12.9.2020
BATTERY JAPAN, Osaka, 9.9.-11.9.2020
IMTS2020, 14.9.-19.9.2020, Chicago, IL
Interlight Russia, Moscow, 14.9.-17.9.2020
Prolight + Sound NAMM, Moscow, 17.9.-19.9.2020
Prolight + Sound Shanghai, 28.10.-30.10.2020
SPS 2020, Nuremberg, 24.11.-26.11.2020
ISE 2021, Barcelona, Spain, 2.2.-5.2.2021
DistribuTECH, 9.2.-11.2.2021, San Diego, CA
BATTERY JAPAN, Tokyo, 3.3.-5.3.2021
BATTERY JAPAN, Osaka, 29.9.-1.10.2021
DistribuTECH, 25.1.-27.1.2022, Dallas, TX
Interesting video
The ISS Design Challenge ...
Interesting video
Mouser Electronics Warehouse Tour with Grant Imahara
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