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Forum 凌力尔特推出18位模数转换器
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凌力尔特推出18位模数转换器

YYD
YYD over 14 years ago

来源:电子产品世界

 凌力尔特公司 (Linear Technology Corporation) 推出一款串行 18 位、1.6Msps SAR 模数转换器(ADC) LTC2379-18,该器件在支持全差分 ±5V 输入范围的同时,也实现了无与伦比的 101dB SNR 和 -118dB THD。这种突破性性能确立了凌力尔特公司在高性能 ADC 领域的领导者地位。LTC2379-18 具 ±2LSB 的最大 INL,在 -40ºC 至 125ºC 的温度范围内无漏码且性能规格有保证。LTC2379-18 以 2.5V 电源工作,仅消耗 18mW 功率,采用小型 3mm x 4mm DFN 和 MSOP-16 封装。LTC2379-18 的高 SNR、快速采样和低功耗使其非常适用于高性能医疗、工业和汽车应用。

  伴随 LTC2379-18 还有引脚和软件兼容的 16 位、2Msps LTC2380-16。LTC2380-16 实现了令人赞叹的 96dB SNR 和 ±0.5LSB 的最大 INL。LTC2379-18 和 LTC2380-16 是一个 18 位 / 16 位高性能 SAR ADC 系列中最先推出的两款器件,该系列 ADC 的速度范围为 250ksps 直至 2Msps。这些器件提供新的革命性数字增益压缩功能,因此在 ADC 驱动器上无需负电源,从而极大地降低了信号链路的总体功耗。该器件的停机模式在空闲状态时可将功耗进一步降至 1.25uW。真正无延迟工作实现了准确的单次测量,甚至在很长的空闲周期后,也没有最低采样率要求。

  明确的 BUSY 和 CHAIN 引脚加上用户友好的 SPI 接口支持 1.8V 至 5V 的 I/O 电压、简化了数字定时、并最大限度地减少了外部组件。

  LTC2379-18 和 LTC2380-16 已开始供货,以 1,000 片为单位批量购买,每片 LTC2379-18 的价格为 29.95 美元,而每片 LTC2380-16 的价格为 24.50 美元。为了实现不打折扣的 AC 性能,我们建议用快速稳定的 LT6350 ADC 驱动器完成输入信号的单端至差分转换。我们还建议使用具高准确度、低噪声和低功率的精准外部基准 LTC6655。采用 LT6350 ADC 驱动器和 LTC6655 基准的集成式演示电路板DC1783A 在

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