For customers designing Texas Instruments CC1xxx, CC2xxx, CC430, CC85xx series Low Power RF applications
以下提供了使用石英晶体的外部振荡电路设计注意事项的基本说明，适用于“低功耗射频”技术，包括 ZigBee、IEEE802.15.4 和 1 GHz 以下频段无线应用。“请参阅下面的德州仪器 ZigBee/IEEE802.15.4 和 1 GHz 以下频段解决方案。”
时钟解决方案建议
在实现低功耗射频设计时，应考虑以下因素。
- 振荡启动时间
- 频率调谐
- 工作温度下 BER（误码率）较低
| No. | Oscillation Circuit Factor | 2.4 GHz , sub 1 GHz | sub 1 GHz(narrow band) |
|---|---|---|---|
| AT crystal unit spec. | TCXO spec. | ||
| 1 | Quick oscillation start-up time - High oscillation allowance - Boost inverter |
Lower ESR(R1) High drive level |
Quick start-up time |
| 2 | Easy frequency control - inner frequency tuning capacitor |
proper frequency sensitivity low parameters' variation |
High frequency stability |
| 3 | Lower BER - temperature compensation |
High frequency stability | High frequency stability |
| MHz Crystal equivalent circuit |
 |
| Oscillation start-up time -> Lower ESR (R1) , Higher C1 -> Higher drive level |
|
| Suitable Frequency Tuning -> Lower parameters variation(C0,C1,L1,ESR) |
|
| Suitable Frequency Tuning -> Proper Sensitivity (CL,C0) |
|
| Higher Frequency Stability -> Stable fSTA |
|
Texas Instruments MSP430 时钟解决方案
适用于 CC1xxx 系列、CC430 系列
低于 1GHz 频段
| IC Name | Epson products | |||
|---|---|---|---|---|
| Product Name | Frequency [Hz] | CL [pF] | Product Code | |
|
CC1101, CC1110, CC1111, CC1100E
|
TSX-3225
|
26M
|
10
|
|
|
FA-128
|
26M
|
9
|
||
|
CC1120, CC1200, CC1121
(narrow band system) |
FA-128
|
32M
|
10
|
|
|
FA-20H
|
32M
|
10
|
||
|
TG-5035CG
|
32M
|
-
|
||
|
CC1125
(narrow band system), CC1175 |
FA-128
|
40M
|
10
|
|
|
FA-128
|
32M
|
10
|
||
|
FA-20H
|
40M
|
10
|
||
|
FA-20H
|
32M
|
10
|
||
|
CC1312, CC1352
|
FA-128
|
48M
|
7
|
|
|
CC430
|
TSX-3225
|
26M
|
10
|
|
|
TSX-3225
|
48M
|
16
|
||
(261KB)Notes:
以上建议基于实际评估结果，旨在帮助用户选择合适的组件。结果仅根据从客户收到的样品集，因此不包括 IC 和外部零件的分散趋势。
由于实际电路板布局和外部元件选择会影响最合适的晶体负载电容，我们不承担任何责任，也不对上述建议提供保证。用户的设计必须通过自己的个人评估进行验证和决定。
适用于 CC2xxx 和 CC85xx 系列
2.4 GHz 频段
|
ZigBee IEEE802.15.4
Proprietary 2400 MHz to 2483.5 MHz |
Eeson products | |||
|---|---|---|---|---|
| Product name | Frequency [Hz] | CL [pF] | Product code | |
|
CC2500
|
FA-128
|
26M
|
10
|
|
|
CC2510
|
FA-128
|
26M
|
9
|
|
|
CC2511
|
TSX-3225
|
40M
|
16
|
|
|
CC2520
|
TSX-3225
|
32M
|
16
|
|
|
CC2530, CC2531
|
FA-20H
|
32M
|
16
|
|
|
FA-20H
|
32M
|
12
|
||
|
FA-128
|
32M
|
12
|
||
|
TSX-3225
|
32M
|
16
|
||
|
CC2533
|
FA-128
|
32M
|
12
|
|
|
CC2538
|
FA-128
|
32M
|
10
|
|
|
CC2540
(Bluetooth Low Energy) |
FA-20H
|
32M
|
16
|
|
|
CC2540, CC2541
(Bluetooth Low Energy) |
FA-128
|
32M
|
10
|
|
|
CC2541
(Bluetooth Low Energy) |
FA-20H
|
32M
|
10
|
|
|
CC2550
|
TSX-3225
|
26M
|
16
|
|
|
CC256x
(Bluetooth BR/EDR/LE) |
FA-128
|
26M
|
9
|
|
|
FA-20H
|
26M
|
9
|
||
|
CC2612, CC2652
|
FA-128
|
48M
|
7
|
|
|
CC2570, CC2571
(ANT RF network processor) |
TSX-3225
|
32M
|
10
|
|
|
CC13xx, CC26x0
|
TSX-3225
|
24M
|
9
|
|
|
CC85xx
(Wireless Audio Streeming) |
TSX-3225
|
48M
|
12
|
|
|
TSX-3225
|
48M
|
16
|
||
|
FA-128
|
48M
|
16
|
||
|
FA-128
|
48M
|
10
|
||
参考：CC253x、CC254x 晶体选择指南，链接至Texas Instruments pdf。
Notes:
以上建议基于实际评估结果，旨在帮助用户选择合适的组件。结果仅根据从客户收到的样品集，因此不包括 IC 和外部零件的分散趋势。
由于实际的电路板布局和外部元件的选择会影响最合适的晶体负载电容，我们不对上述建议承担任何责任和保证。
用户的设计必须通过自身和个人评估来验证和决定。
请参考Texas Instruments CC2xxx 手册进行设计。