LTC6908 具扩频调制功能、采用电阻器设定频率的 SOT-23 封装振荡器
LTC®6908 是一款易用型精准振荡器，可提供两个相移 180° 或 90° 的输出。振荡器频率可利用单个外部电阻器 (RSET) 来设置，并可启动扩频调频 (SSFM) 功能来改善电磁兼容性 (EMC) 性能。
LTC6908 采用 2.5V 至 5.5V 的单工作电源，并提供了轨至轨、50% 占空比方波输出。一个阻值范围为 10k 至 2M 的电阻器用于设定一个 50kHz 至 10MHz 的振荡器频率 (5V 电源)。振荡器的频率可以很容易地运用下面的简单公式来设置：
fOUT = 100MHz․10k/ RSET
LTC6908 的 SSFM 功能可利用一个伪随机噪声 (PRN) 信号来调制输出频率，以降低峰值电磁辐射并改善 EMC 性能。扩频量被固定于中心频率的 ±10%。当 SSFM 被使能时，调制速率将由用户来选择。3 种可行的调制速率为 fOUT/16、fOUT/32 和 fOUT/64。
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LTC6908 订购信息和价格参考Package Variations and Pricing
| 器件型号 | 封装 | 引脚 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
| LTC6908CDCB-1 | DFN | 6 | C | $2.45 | |
| LTC6908CDCB-1#PBF | DFN | 6 | C | $2.45 | |
| LTC6908CDCB-1#TR | DFN | 6 | C | $2.45 | $1.65 |
| LTC6908CDCB-1#TRM | DFN | 6 | C | $2.45 | $1.67 |
| LTC6908CDCB-1#TRMPBF | DFN | 6 | C | $2.45 | $1.67 |
| LTC6908CDCB-1#TRPBF | DFN | 6 | C | $2.45 | $1.65 |
| LTC6908CDCB-2 | DFN | 6 | C | $2.45 | |
| LTC6908CDCB-2#PBF | DFN | 6 | C | $2.45 | |
| LTC6908CDCB-2#TR | DFN | 6 | C | $2.45 | $1.65 |
| LTC6908CDCB-2#TRM | DFN | 6 | C | $2.45 | $1.67 |
| LTC6908CDCB-2#TRMPBF | DFN | 6 | C | $2.45 | $1.67 |
| LTC6908CDCB-2#TRPBF | DFN | 6 | C | $2.45 | $1.65 |
| LTC6908CS6-1 | SOT | 6 | C | $2.43 | |
| LTC6908CS6-1#PBF | SOT | 6 | C | $2.43 | |
| LTC6908CS6-1#TR | SOT | 6 | C | $2.43 | $1.65 |
| LTC6908CS6-1#TRM | SOT | 6 | C | $2.43 | $1.67 |
| LTC6908CS6-1#TRMPBF | SOT | 6 | C | $2.43 | $1.67 |
| LTC6908CS6-1#TRPBF | SOT | 6 | C | $2.43 | $1.65 |
| LTC6908CS6-2 | SOT | 6 | C | $2.43 | |
| LTC6908CS6-2#PBF | SOT | 6 | C | $2.43 | |
| LTC6908CS6-2#TR | SOT | 6 | C | $2.43 | $1.65 |
| LTC6908CS6-2#TRM | SOT | 6 | C | $2.43 | $1.67 |
| LTC6908CS6-2#TRMPBF | SOT | 6 | C | $2.43 | $1.67 |
| LTC6908CS6-2#TRPBF | SOT | 6 | C | $2.43 | $1.65 |
| LTC6908HS6-1 | SOT | 6 | H | $3.46 | |
| LTC6908HS6-1#PBF | SOT | 6 | H | $3.46 | |
| LTC6908HS6-1#TR | SOT | 6 | H | $3.46 | $2.44 |
| LTC6908HS6-1#TRM | SOT | 6 | H | $3.46 | $2.46 |
| LTC6908HS6-1#TRMPBF | SOT | 6 | H | $3.46 | $2.46 |
| LTC6908HS6-1#TRPBF | SOT | 6 | H | $3.46 | $2.44 |
| LTC6908HS6-2 | SOT | 6 | H | $3.46 | |
| LTC6908HS6-2#PBF | SOT | 6 | H | $3.46 | |
| LTC6908HS6-2#TR | SOT | 6 | H | $3.46 | $2.44 |
| LTC6908HS6-2#TRM | SOT | 6 | H | $3.46 | $2.46 |
| LTC6908HS6-2#TRMPBF | SOT | 6 | H | $3.46 | $2.46 |
| LTC6908HS6-2#TRPBF | SOT | 6 | H | $3.46 | $2.44 |
| LTC6908IDCB-1 | DFN | 6 | I | $2.92 | |
| LTC6908IDCB-1#PBF | DFN | 18 | I | $2.92 | |
| LTC6908IDCB-1#TR | DFN | 6 | I | $2.92 | $2.04 |
| LTC6908IDCB-1#TRM | DFN | 6 | I | $2.92 | $2.06 |
| LTC6908IDCB-1#TRMPBF | DFN | 6 | I | $2.92 | $2.06 |
| LTC6908IDCB-1#TRPBF | DFN | 6 | I | $2.92 | $2.04 |
| LTC6908IDCB-2 | DFN | 6 | I | $2.92 | |
| LTC6908IDCB-2#PBF | DFN | 6 | I | $2.92 | |
| LTC6908IDCB-2#TR | DFN | 6 | I | $2.92 | $2.04 |
| LTC6908IDCB-2#TRM | DFN | 6 | I | $2.92 | $2.06 |
| LTC6908IDCB-2#TRMPBF | DFN | 6 | I | $2.92 | $2.06 |
| LTC6908IDCB-2#TRPBF | DFN | 6 | I | $2.92 | $2.04 |
| LTC6908IS6-1 | SOT | 6 | I | $2.90 | |
| LTC6908IS6-1#PBF | SOT | 6 | I | $2.90 | |
| LTC6908IS6-1#TR | SOT | 6 | I | $2.90 | $2.04 |
| LTC6908IS6-1#TRM | SOT | 6 | I | $2.90 | $2.06 |
| LTC6908IS6-1#TRMPBF | SOT | 6 | I | $2.90 | $2.06 |
| LTC6908IS6-1#TRPBF | SOT | 6 | I | $2.90 | $2.04 |
| LTC6908IS6-2 | SOT | 6 | I | $2.90 | |
| LTC6908IS6-2#PBF | SOT | 6 | I | $2.90 | |
| LTC6908IS6-2#TR | SOT | 6 | I | $2.90 | $2.04 |
| LTC6908IS6-2#TRM | SOT | 6 | I | $2.90 | $2.06 |
| LTC6908IS6-2#TRMPBF | SOT | 6 | I | $2.90 | $2.06 |
| LTC6908IS6-2#TRPBF | SOT | 6 | I | $2.90 | $2.04 |
LTC6908 数据手册及相关资料下载
- 数据手册 (英文) : LTC6908-1/LTC6908-2 - Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation.PDF
- 应用指南 (英文) : AN93 - Instrumentation Applications for a Monolithic Oscillator: A Clock for All Reasons.PDF
- 设计要点 (中文) : DN411 - 简单且紧凑的四输出负载点 DC/DC uModule 系统.PDF
- 可靠性数据 : R494 Reliability Data .PDF
- 产品选型卡 : Silicon Oscillators.PDF
