你好!在使用CC2541过程中遇到关于32MHZ Crystal Frequency Tolerance的问题;
1. 请问量产的时候如何校准频偏?在论坛上看到贵司员工回复“ble不能正常通讯”量产问题时说如果使用的是±10ppm 32MHZ Crystal就不用校准频率,这个±10ppm是指的初始频率特性还是frequency versus temperature characteristics?或者初始频率特性和frequency versus temperature characteristics两者都需要满足±10ppm?
2. 在贵司AN100 – Crystal Selection Guide上推荐Epson Toyocom的FA-128和FA-20H,请告知这两个Crystal的采购代码;
Thanks.
wenzhong shen:
Part name
Pcs/unit
Description
Manufacturer
Part number
Supplier
Ordering code(采购代码)
X_32.000/10/20/40/10
1
Crystal, 32.000000MHz, FA-20H, 10.0pF, +/-10ppm, (FTC: +/-20ppm at -40/85C), 40ohms
Epson Toyocom
FA-20H, 32MHz, 10PPM, 10pF, -40/+85C, 40ohms
ACTE
Q24FA20H0021714X_32.768/20/50/40/12
1
Crystal, 32.768 kHz, 12.5pF, 20/50 ppm,SMD package
Epson Toyocom
MC-306
ACTE
Q13MC3061000314
jun xu6:
回复 wenzhong shen:
Hi wenzhong:
Thanks.