The A3211 and A3212 integrated circuits are ultra-sensitive, pole-agnostic Hall-effect switches with latched digital outputs. These devices are particularly suitable for operation of battery-powered, handheld devices such as mobile and cordless phones, pagers, and handheld computers. The 2.5 to 3.5 V operating voltage range and unique clocking method reduce the average operating power requirement to less than 15 μW at a 2.75 V supply voltage.
与其他Hall effect switch不同的是，只要北极or南极磁场强度足够大，就能打开 A3212 中的输出，没有磁场的时候，输出就会停止。A3211 提供反向输出。不受磁极影响和最低的功率要求，允许这些器件轻松取换簧片开关，具有更高的可靠性并便于制造，从而降低对信号条件的要求。
Stability chopper (dynamic offset cancellation) improves stability and reduces residual offset voltages typically caused by device overmolding, temperature dependence, and thermal stress.
The device centralizes a Hall generator, small signal amplifier, stable chopper characteristics, latching, and MOSFET outputs on a single silicon. Utilizes advanced BiCMOS processes to achieve low voltage and low power requirements, component matching, very low input bias errors, and small component geometries.
Four package types provide magnetically optimized solutions for most applications. The miniature low-thickness surface mount package types EH and EL (0.75 and 0.50 mm scales) are lead-free, LH is a three-pin low-thickness SMD, and UA is a three-pin SIP for via mounting. The package is a lead-free package (suffix –T) and the pin frame is 100% matte tin plated.
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微功率操作
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使用南极或北极操作
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在 2.5 至 3.5 V 电池电压工作
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稳定斩波
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超卓的温度稳定性
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极低的开关点漂移
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对物理应力不敏感
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固态可靠性
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小尺寸
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不受磁极影响，可轻松制造