高精度超小型的表面贴片型石英晶体振荡器,最适用于移动通信终端的基准时钟等移动通信领域.比如智能手机,无线通信,卫星导航,平台基站等较高端的数码产品,晶振本身小型,薄型具备各类移动通信的基准时钟源用频率,贴片晶振具有优良的电气特性,耐环境性能适用于移动通信领域,满足无铅焊接的高温回流温度曲线要求.
温补贴片晶振(TCXO)产品本身具有温度补偿作用,高低温度稳定性:频率精度高0.5 PPM-2.0 PPM,工作温度范围:-30度至85度,电源电压:1.8V-3.3V之间可供选择,产品本身具有温度电压控制功能,世界上最薄的晶振封装,频率:26兆赫,33.6兆赫,38.4兆赫,40兆赫,因产品性能稳定,精度高等优势,被广泛应用到一些比较高端的数码通讯产品领域,GPS全球定位系统,智能手机,WiMAX和蜂窝和无线通信等产品,符合RoHS/无铅.
有源晶振,是只晶体本身起振需要外部电压供应,起振后可直接驱动CMOS输出晶振集成电路,产品本身已实现与薄型IC(TSSOP封装,TVSOP封装)同样的1mm厚度,断开时的消费电流是15 µA以下,编带包装方式可对应自动搭载及IR回流焊接(无铅对应)产品有几种电压供选1.8V,2.5V,3V3.3V,5V,以应对不同IC产品需要.
小体积贴片2016晶振,外观小型,表面贴片型石英晶体谐振器,因本身体积小等优势,适用于移动通信终端的基准时钟等移动通信领域.小型,薄型,轻型(2.0×1.6×0.5mmtyp.)具备优良的耐环境特性及高耐热性强.满足无铅焊接的回流温度曲线要求.
贴片压电石英晶体,体积小,焊接可采用自动贴片系统,产品本身小型,无源晶振,特别适用于有小型化要求的电子数码产品市场领域,因产品小型,薄型优势,耐环境特性,包括耐高温,耐冲击性等,在移动通信领域得到了广泛的应用,晶振产品本身可发挥优良的电气特性,达到了无铅焊接的高温回流温度曲线的标准.
贴片表晶32.768K系列具有超小型,薄型,质地轻的表面贴片音叉型石英晶体谐振器,无源晶振产品本身具备优良的耐热性,耐环境特性,在办公自动化,家电领域,移动通信领域可发挥优良的电气特性,符合无铅标准,满足无铅焊接的回流温度曲线要求,金属外壳的石英晶振使得产品在封装时能发挥比陶瓷晶振外壳更好的耐冲击性能.
32.768K时钟晶体具有小型,薄型,轻型的贴片晶振表面音叉型石英晶体谐振器,产品具有优良的耐热性,耐环境特性,可发挥石英晶振优良的电气特性,符合RoHS规定,满足无铅焊接的高温回流温度曲线要求,金属外壳的封装使得产品在封装时能发挥比陶瓷谐振器外壳更好的耐冲击性.
贴片表晶32.768K系列具有超小型,薄型,质地轻的表面贴片音叉型石英晶体谐振器,晶振产品本身具备优良的耐热性,耐环境特性,在办公自动化,家电领域,移动通信领域可发挥优良的电气特性,符合无铅标准,满足无铅焊接的回流温度曲线要求,金属外壳的石英晶振使得产品在封装时能发挥比陶瓷晶振外壳更好的耐冲击性能.
彼得曼32.768K有源晶振的优势,Time requirements in modern metering applications have massively increased in the last few years. The usual requirement in modern metering applications is a time offset of 1 hour after 7 years. It should also be possible for the operating temperature range of the application to comply with this value. 1 hour max. after 7 years corresponds to a frequency tolerance of ±16 ppm absolute at 32,768 kHz. It is no longer possible for conventional 32,768 kHz oscillating crystals to meet these requirements.
On the one hand, this is because 32,768 kHz are only available with a frequency tolerance of ±10ppm at +25°C, on the other hand, the temperature stability over a temperature range of -40/+85°C is more then -180 ppm. Moreover, ageing of approx. ±30 ppm after 10 years must be taken into account when calculating accuracy. In the worst case, a 32,768 kHz crystal has a maximum frequency stability of +40/-220 ppm (including adjustment at +25°C, temperature stability and ageing after 10 years). External circuit capacitance must be able to compensate any systematic frequency offset caused by the internal capacitance of the oscillator stage of the IC to be synchronised and by stray capacitance. The selection of a layout without external circuit capacitance for the 32,768 crystal involves a great risk because the accuracy of the 32,768 crystal can neither be corrected nor adjusted to suddenly changing PCB conditions during series production. Initially, the intersection angle for the 32,768 crystal was designed for optimal accuracy in wristwatches, and not for most of the applications for which it is used nowadays.
In order to meet the highly accurate time requirements, we as a clocking specialist offer the series ULPPO ultra low power 32,768 kHz oscillator. This oscillator can be operated with each voltage within a VDD range of 1.5 to 3.63 VDC. The specified current consumption is 0.99 µA. The temperature stability of ULPPOs is ±5 ppm over a temperature range of -40/+85°C. Frequency stability (delivery accuracy plus temperature stability) is ±10 ppm, and ageing after 20 years is ±2 ppm. Thus the maximum overall stability of ULPPOs is ±12 ppm including the ageing after 10 years. These are industry best parameters.
No external circuit capacitance is required for the circuiting of the ultra small housing (housing area: 1.2 mm2). The input stage of the IC installed in the ULPPO independently filters the supply voltage. Compared to crystals, ULPPOs save a lot of space on the printed circuit board so that the packing density can be increased, and smaller printed circuit boards can be designed. The adjustment of the amplitude further reduces the power consumption of the ULPPO.
For space calculations, both external circuit capacitances for a crystal on the printed circuit board must also be taken into account. With its two external circuit capacitances, even the smallest 32,768 kHz crystal requires more space on the PCB than ULPPOs do.
Moreover, very small 32,768 kHz crystals have very high resistances which usually cannot be safely overcome by the oscillator stages to be synchronised because the oscillator stages of the ICs or RTCs to be synchronised have very high tolerances as well. Therefore, sudden response time problems in the field might occur which can be ruled out with ULPPOs. Thus, the safe operation of the application is possible with ULPPOs under all circumstances.
Oscillator stages consume a lot of energy to keep a 32,768 crystal oscillating. Usually, the input stage of the MCU can be directly circuited with the LVCMOS signal of the ULPPO (usually Xin). Thus the input stage of the MCU can be deactivated (bypass function) so that the energy saved can be used for the calculation of the system power consumption of the meter. Moreover, ULPPOs are able to synchronise several ICs at a time. Due to the very high accuracy of the ULPPO, less time synchronisations are required, which also saves system power.
Of course, ULPPOs can be used in any applications which require miniaturised ultra low power 32,768 kHz oscillators such as smartphones, tablets, GPS, fitness watches, health and wellness applications, wireless keyboards, timing systems, timing applications, wearables, IoT, home automation, etc. Due to the high degree of accuracy of 32,768 kHz oscillators, the standby time or even the hypernation time in hypernation technology applications can be significantly increased so that a high amount of system power can be saved due to the significantly lower battery-intensive synchronisation cycles. Thus the 32,768 kHz oscillator is the better choice compared to 32,768 kHz crystals. Ultra low power 32,768 kHz oscillators are available with diverse accuracy variations – see also the ULPO-RB1 and -RB2 series.
不断精进自我的优质制造商彼得曼公司,致力于开发大量高质量的产品,随着近几年来,现代计量应用的时间要求大幅提高。现代计量应用的通常要求是7年后时间偏移1小时。应用的工作温度范围也应符合该值。最多1小时。7年后对应于32,768kHz下16ppm绝对值的频率容差。传统的32,768 kHz振荡晶体不再可能满足这些要求。彼得曼32.768K有源晶振的优势.
一方面,这是因为32,768kHz仅在+25°C时具有10ppm的频率容差,另一方面,在-40/+85°C温度范围内的温度稳定性高于-180ppm。此外,老化约。计算精度时,必须考虑10年后的30ppm。最差情况下,32.768K有源晶振的最大频率稳定性为+40/-220 ppm(包括+25°C时的调整、温度稳定性和10年后的老化)。外部电路电容必须能够补偿由要同步的ic振荡器级的内部电容和杂散电容引起的任何系统频率偏移。为32,768晶振选择无外部电路电容的布局包含很大的风险,因为在批量生产期间,32,768晶振的精度既不能校正也不能调整以适应突然变化的PCB条件。最初,32,768英寸晶体的交叉角度是为手表的最佳精度而设计的,而不是为如今使用它的大多数应用而设计的。