【x选型】pin-pin替代ADG412BRZ四路SPST CMOS模拟开关SGM4512YS16G/TR，导通电阻更低

时间： 2019-11-01 来源：SGMICRO

技术问答

为保证电压频率转换器（V-F）控制角度模块信号链路完成高速信号切换功能，市场上有用ADI公司的四路SPST CMOS模拟开关 ADG412BRZ设计，不过因其供货交期和价格压力，很多客户会选择一款低成本、供货交期好的替代方案，本文重点推荐国产圣邦微（SGMICRO）的SGM4512YS16G/TR模拟开关pin-pin替代ADG412BRZ，典型电性参数对比参考如下图1所示。

图1：模拟开关SGM4512YS16G/TR与ADG412BRZ典型电性参数对照表

通过如上图示易知：

圣邦微模拟运放SGM4512YS16G/TR相比ADG412BRZ具有更快的开关特性参数，参考如下：

1、 30Ω更低的最大导通电阻，开通损耗更低；

2、 160ns更低的总开关时间（ton=40ns，toff=120ns），可实现更快的开关切换，具有更出色的开关响应能力；

3、 1.6V更低的导通控制逻辑电压，0.5V更低的关断控制逻辑电压，可实现更低功耗的逻辑控制。

当然，ADI的模拟开关ADG412BRZ具有极低的静态电源电流能力，表现更出色的低功耗特性。

圣邦微四路SPST CMOS模拟开关SGM4512YS16G/TR与ADG412BRZ均为SOIC-8封装，内置4路SPST模拟开关，典型内部功能框图和pin脚定义参考如下图2所示。

图2：模拟开关SGM4512YS16G/TR与ADG412BRZ内部功能框图及pin脚定义

通过如上图示易知：

模拟开关SGM4512YS16G/TR与ADG412BRZ内部功能框图及pin脚定义完全一致，可实现pin-pin兼容设计，无需改动外部设计电路。

除去上面介绍的技术优势外，圣邦微模拟开关SGM4512YS16G/TR还有以下几点竞争优势：

1、具有更好的供货周期，可快速支持样品和后续量产品服务；

2、作为国产领先的模拟器件供应商，相比ADI公司的ADG412BRZ具有更低的成本，可提升客户产品竞争力。

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SGMICRO（圣邦微）信号链和电源管理芯片选型指南

描述- SGMICRO specializes in high-performance and high-quality analog and mixed-signal integrated circuits, and is committed to building a comprehensive portfolio of the highest quality analog and mixed-signal integrated circuits to address all customer needs.

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

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