A3212ELHLT 数据手册 - Allegro MicroSystems（急速微电子）

感应范围Sensing Range| 37/-40G跳闸，31/-34G释放 37/-40G Trip，31/-34G Release \---|--- 类型Type| 霍尔效应开关 Hall Effect Switch 电源电压Voltage - Supply| 2.5-3.5V 电源电流Current - Supply| 2.0mA 输出电流Current - Output (Max)| 1.0µA Description & Applications| MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCHES The A3209Ex and A3210Ex integrated circuits are ultra-sensitive, pole independent Hall-effect switches with a latched digital output. They are especially suited for operation in battery-operated, hand-held equipment such as cellular and cordless telephones, pagers, and palmtop computers. 2.5 volt to 3.5 volt operation and a unique clocking scheme to reduce the average operating power requirements – the A3209Ex to 400 µW, the A3210Ex to 25 µW! Except for operating duty cycle and average operating current, the A3209Ex and A3210Ex are identical. Unlike other Hall-effect switches, either a north or south pole of sufficient strength will turn the output on; in the absence of a magnetic field, the output is off. The polarity independence and minimal power requirement allows these devices to easily replace reed switches for superior reliability and ease of manufacturing, while eliminating the requirement for signal conditioning. Improved stability is made possible through chopper stabilization (dynamic offset cancellation), which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. 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. The A3209Ex and A3210Ex are rated for operation over a temperature range of -40°C to +85°C. Two package styles provide a magnetically optimized package for most applications. Suffix ‘LH’ is a miniature low-profile surface-mount package while suffix ‘UA’ is a three-lead ultra-mini-SIP for through-hole or surface mounting. Micropower Operation Operate With North or South Pole 2.5 V to 3.5 V Battery Operation Chopper Stabilized Superior Temperature Stability Extremely Low Switch-Point Drift Insensitive to Physical Stress ESD Protected to 5 kV Solid-State Reliability Small Size Easily Manufacturable With Magnet Pole Independence 描述与应用| 微功耗，超灵敏 霍尔效应开关 A3209Ex A3210Ex集成电路是超敏感，极 独立的霍尔效应开关锁存数字输出。它们是 特别是在电池供电的手持式设备，如适合于运行 蜂窝和无绳电话，传呼机，掌上型电脑。 2.5伏 3.5伏操作和独特的时钟计划，以降低平均运行功率的要求 - 400μW，25μW，A3210Ex A3209Ex！ 除经营占空比和平均工作电流，A3209Ex 和A3210Ex是相同的。 与其他霍尔效应开关不同的是，北极或南极足够 强度将关闭输出;的磁场的情况下，输出的是 关闭。极性独立性和最小的功率要求，允许这些 设备轻松更换簧片开关，卓越的可靠性和易用性 制造，同时消除了用于信号调节的要求。 改进的稳定性是可以通过斩波稳定（动态 偏移取消），从而降低了残留偏移电压通常是由于 由器件超模压，温度依存性及热应力。 这些设备包括一个单一的硅芯片霍尔电压发生器， 小信号放大器，稳定斩波特性，锁存和MOSFET输出。 先进的BiCMOS处理用于利用低电压和 低功耗的要求，元件匹配，极低的输入偏移错误， 和小型元件几何尺寸。 额定工作温度的A3209Ex和A3210Ex 范围为-40°C至+85°C。两种封装类型对于大多数应用提供磁性优化的封装。 后缀左的一个缩影低调 表面贴装封装，而后缀UA是一个三引脚超小型SIP 通孔或表面安装。 微操作 随着北极或南极运行 2.5 V至3.5 V电池操作 斩波稳定 卓越的温度稳定性 极低的开关点漂移 物理应力不敏感 5千伏ESD保护 固态可靠性 小型 容易制造与磁极独立