A3213 and A3214: Micropower, Ultrasensitive Hall-Effect Switches

A3213和A3214集成电路是具有锁存数字输出的超灵敏、极独立霍尔效应开关。它们特别适用于电池供电的手持设备，如蜂窝电话和无绳电话、寻呼机和掌上电脑。2.4至5.5伏的工作电压和独特的时钟方案降低了平均工作功率要求——A3213至825微瓦，A3214至14微瓦（通常为2.75伏）。除了工作占空比和平均工作电流外，A3213和A3214是相同的。

与其他霍尔效应开关不同，无论是足够强度的北极还是南极都会打开输出；在没有磁场的情况下，输出会关闭。极性独立性和最小功率要求允许这些设备取代簧片开关，以获得更高的可靠性和易于制造，同时消除了对信号调节的要求。

通过斩波器稳定（动态偏移消除）可以提高稳定性，这降低了通常由器件二次成型、温度依赖性和热应力引起的残余偏移电压。

These devices include, on a single silicon chip, a Hall-voltage generator, small-signal amplifier, chopper stabilization, a latch, and a MOSFET output. Advanced BiCMOS processing is used to take advantage of low-voltage and low-power requirements, component matching, very low input-offset errors, and small component geometries.

Range 'E' devices are rated for operation over a temperature range of -40°C to 85°C; range 'L' devices are rated for operation over a temperature range of -40°C to 150°C. Two package styles provide a magnetically optimized package for most applications. 'LH' is a miniature low-profile surface-mount package, 'UA' is a three-lead SIP for through-hole mounting. For the A3213, a microleadless DFN/MLP package 'EL' also is available. Each package is available in a lead (Pb) free version (suffix, –T), with a 100% matte tin plated leadframe.

• AEC-Q100 automotive qualified
• Micropower operation
• Operate with north或south pole
• 2.4 to 5.5 V battery operation
• Chopper stabilized
  • Superior temperature stability
  • 极低的开关点漂移
  • Insensitive to physical stress
• 高ESD保护
• Solid-state reliability
• Small size
• Simply manufacturable with magnet pole independence