The A3213 and A3214 ICs are ultra-sensitive, pole-agnostic Hall-effect switches with latched digital outputs. They are particularly suitable for the operation of battery-powered, handheld devices such as mobile and cordless phones, pagers, and handheld computers. The 2.4 to 5.5 V operating voltage range and unique clocking method reduce average operating power requirements to 825 μW (for the A3213) and 14 μW (for the A3214) or less (at 2.75 V)! The A3213 and A3214 share the same characteristics except for the operating cycle and average operating current.
Unlike other Hall effect switches, the output can be turned on as long as the magnetic field strength at the north or south pole is strong enough; When there is no magnetic field, the output stops. Being independent of magnetic poles and minimal power requirements allow these devices to easily replace reed switches with greater reliability and ease of fabrication, reducing signal condition requirements.
Stability chopper (dynamic offset cancellation) improves stability and reduces residual offset voltages typically caused by device overmolding, temperature dependence, and thermal stress.
These devices concentrate Hall generators, small signal amplifiers, chopper-stabilized chopper characteristics, latching, and MOSFET outputs on a single silicon. The advanced BiCMOS process is used to take advantage of low voltage and low power requests, component matching, very low input bias errors, and small component geometries.
Devices in the range "E" are rated for -40°C to 85°C, while devices in the range "L" are rated for -40°C to 150°C. Both package models offer magnetically optimized packages for most applications. The 'LH' is a miniature, low-profile surface-mount package, and the 'UA' is a three-pin SIP for via mounting. For the A3213, a miniature lead-free DFN/MLP package 'EL' is also available. All packages are lead-free versions (suffix, –T) with 100% matte tin plating on the pin frame.
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微功率操作
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使用南极or北极操作
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在 2.4 至 5.5 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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高度静电放电保护
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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