意法半导体保证启动时间的故障安全比较器对可靠性和节能性进行优化
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Failsafe comparators with guaranteed start-up time boost reliability and power savings
保证启动时间的故障安全比较器对可靠性和节能性进行优化
TS3121 and TS3121A rail-to-rail, open-drain, single channel comparators feature a novel failsafe architecture and guaranteed start-up time that simplify powering up for short periods to minimize consumption in low-power applications. Ideal for use in industrial controls, building automation, power tools, smart metering, as well as in automotive powertrain and body-control modules.
TS3121和TS3121A轨对轨、开漏、单通道比较器采用了新颖的故障安全架构，并能有效保证启动时间。此举简化了短时间通电，从而充分降低了低功耗应用的功耗。此类器件非常适合用于工业控制、楼宇自动化、电动工具、智能计量以及汽车动力总成和车身控制模块。
The failsafe architecture allows analog sensor voltages to remain at the inputs when the supply voltage is cut, which ensures robust performance and helps simplify application firmware. The guaranteed start-up time allows frequent power cycling with extended off duration for maximum power savings.
得益于故障安全架构，模拟传感器电压在电源电压切断时仍能保持在输入端。如此便能保证稳健性能，并有助于简化应用程序固件。受保证的启动时间允许频繁的断电重启，并延长关闭时间，带来显著的节能效果。
Inspired by industrial robots that use sensors running from a back-up battery to maintain positional awareness while the main system turns off saving power, these comparators fulfill diverse automation applications. Also featuring independent supply, I/O, and output voltage domains that allow flexible level shifting, they are ideal for use in industrial controls, building automation, power tools, and smart metering. In addition, both the TS3121 and TS3121A are available as automotive-qualified devices that are suited to use in applications such as powertrain and body-control modules.
受工业机器人的启发，比较器采用由备用电池运行的传感器，能够在主系统因省电而关闭时继续保持位置感知，满足了各种自动化应用的需求。此外，比较器还具有独立的电源、I/O和输出电压域，能够实现灵活的电平转换，非常适合用于工业控制、楼宇自动化、电动工具和智能计量。不仅如此，TS3121和TS3121A均属于车规级器件，适用于动力总成和车身控制模块等应用。
The comparators operate over a wide supply-voltage range, from 1.7V to 5.5V, and feature a precision input stage that facilitates accurate threshold detection with typical propagation delay of 60ns. Both devices have typical input-offset voltage of 0.5mV, with a specified maximum offset of 2mV for the TS3121A and 6mV for the TS3121. Both tolerate ESD up to 4kV (HBM), and operate over the extended temperature range from -40°C to 125°C. The comparators are available in space-saving SC70-5 and standard SOT23-5 packages.
比较器在1.7V至5.5V的宽电源电压范围内工作，具有精确的输入级，可实现精确的阈值检测，典型的传播延迟为60ns。两款器件的典型输入偏移电压均为0.5mV，TS3121A的指定最大偏移为2mV，而TS3121的则为6mV。二者均能耐受高达4kV（HBM）的ESD，并在-40°C至125°C的扩展温度范围内工作，分别采用紧凑型SC70-5和标准SOT23-5封装。
All features:
全部特性：
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Low offset voltage: 2 mV max @ 25 °C (A-grade version) 低偏移电压：2 mV max @ 25 °C（A级版本） |
Input/output pins withstand voltages higher than VCC 输入/输出引脚承受的电压高于VCC |
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Low power consumption: 70 μA typ 低功耗：70 μA 典型 |
Fail-safe architecture keeps output in high impedance when VCC = 0 V 当VCC=0 V时，故障安全架构使输出保持高阻抗 |
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Wide supply voltage: 1.7 to 5.5 V 宽供电电压：1.7至5.5 V |
Guaranteed start-up time allows sequential on/off cycles of VCC 受保证的启动时间允许VCC的顺序开/关周期 |
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Propagation delay: 60 ns 传播延时：60 ns |
High ESD tolerance: 4 kV HBM 高ESD容差：4 kV HBM |
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Rail-to-rail input 轨到轨输入 |
Extended temperature range: -40 to +125 °C 宽温度范围：–40 到 +125 °C |
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Open-drain output 漏极开路输出 |
AEC-Q100 qualified AEC-Q100认证 |
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Fail-safe input/output pins 故障安全输入/输出引脚 |
Safety capable: documentation available to aid functional safety system design 安全能力：可用于辅助功能安全系统设计的文档 |
The TS3121 and TS3121A are available now, priced from $0.60 for orders of 1000 units and free samples of the TS3121 and TS3121A are available on the ST eStore. The comparators are included in ST’s 10-year longevity program that guarantees long-term product availability.
TS3121和TS3121A现已上市；千片起订单价0.60美元。用户可从意法半导体电子商城申请TS3121与TS3121A的免费样品。为产品的长期可用性，上述比较器已纳入意法半导体的10年长期供货计划。
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