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A3212 全极性霍尔开关
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- 产品概述
- 技术参数
- 功能框图
- 数据表
产品概述：
A3212EUA-T 详细介绍A3212EUA-T 型号ALLEGRO 品牌系列产品 A3212EUA-T A3212EUA-T 批号 07+ A3212EUA-T 数量 7000 A3212EUA-T 封装 3-pin SIP A3212EUA-T 包装 500 pcs/bag(袋) A3212EUA-T 备注 in stock/original(原)/Rohs A3212EUA-T PDF技术资料 A3212EUA-T 询价 | |
低功耗全极性霍尔开关，用于手机、小灵通、无绳电话、Notebook、PDA翻盖电路，智能远传水表、智能远传气表计数。可兼容替代MLX90248, A3212，TLE4913。
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全极霍尔效应数字开关 | ||||||||
| 型号 | 操作点 (G) | 释放点 (G) | 滞后 (G) | 最大电源电流 (µA) | 电源电压 (V) | 温度范围 | 封装 | 评论 |
| A3211 | ±55 | ±10 | 典型 7.7 | 10 | 2.5 至 3.5 | E | EL、EH、LH | 反向输出；以约 0.1% 的工作循环工作 |
| A3212 | ±55 | ±10 | 典型 7.7 | 10 | 2.5 至 3.5 | E | EL、LH、LH | 以约 0.1% 的工作循环工作 |
| A3213 | ±70 | ±10 | 典型 7.7 | 850 | 2.4 至 5.5 | E、L | LH、UA | |
| A3214 | ±70 | ±10 | 典型 7.7 | 22 | 2.4 至 5.5 | E、L | LH、UA | 以约 0.1% 的工作循环工作 |
| A3245 | ±55 | ±10 | 典型 15 | 3500 | 3.6 至 24 | E、L | LH、UA | |
FEATURES
■ Micropower Operation
■ Operation 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
■ Sol id-State Reliability
■ Small Size
■ Easily Manufacturable with Magnet Pole Independence
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VDD .............................. 5 V
Magnetic Flux Density, B .......... Unlimited
Output Off Voltage, VOUT ...................... 5 V
Output Current, IOUT ........................... 1 mA
Junction Temperature, TJ ................ +170°C
Operating Temperature, TA
Range 'E-' .................... -40°C to +85°C
Range 'L-' .................. -40°C to +150°C
Storage Temperature Range,
TS .............................. -65°C to +170°C
Caution: These CMOS devices have input
static protection (Class 3) but are still susceptible
to damage if exposed to extremely
high static electrical charges.
Features
- 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 - Solid-State Reliability
- Small Size
- Easily Manufacturable with Magnet Pole Independence
Description
The A3211 and A3212 integrated circuits are ultra-sensitive, pole independent Hall-effect switches with latched digital output. These sensors are especially suited for operation in battery-operated, hand-held equipment such as cellular and cordless telephones, pagers, and palmtop computers. A 2.5 volt to 3.5 volt operation and a unique clocking scheme reduce the average operating power requirements to less than 15 µW with a 2.75 volt supply.
Unlike other Hall-effect switches, either a north or south pole of sufficient strength will turn the output on in the A3212, and in the absence of a magnetic field, the output is off. The A3211 provides an inverted output. The polarity independence and minimal power requirements allow 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.
This device includes 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.
Four package styles provide magnetically optimized solutions for most applications. Miniature low-profile surface-mount package types EH and EL (0.75 and 0.50 mm nominal height) are leadless, LH is a leaded low-profile SMD, and UA is a three-lead SIP for through-hole mounting. Packages are available in lead (Pb) free versions (suffix, –T) with 100% matte tin plated leadframe. EL package for limited release, engineering samples available.
Functional Block Diagram
| Part Number | Package Type | RoHS | Temperature |
| Compliant | |||
| A3211EEHLT-T | 3-lead MLP | Yes | -40 °C to 85 °C |
| A3211EELLT-T | 3-lead MLP | Yes | -40 °C to 85 °C |
| A3211ELHLT-T | 3-lead SOT | Yes | -40 °C to 85 °C |
| A3211EUA-T | 3-pin SIP | Yes | -40 °C to 85 °C |
| A3212EEHLT | 3-lead MLP | No | -40 °C to 85 °C |
| A3212EEHLT-T | 3-lead MLP | Yes | -40 °C to 85 °C |
| A3212EELLT-T | 3-lead MLP | Yes | -40 °C to 85 °C |
| A3212ELHLT | 3-lead SOT | No | -40 °C to 85 °C |
| A3212ELHLT-T | 3-lead SOT | Yes | -40 °C to 85 °C |
| A3212EUA | 3-pin SIP | No | -40 °C to 85 °C |
| A3212EUA-T | 3-pin SIP | Yes | -40 °C to 85 °C |
| A3212LLHLT | 3-lead SOT | No | -40 °C to 150 °C |
| A3212LLHLT-T | 3-lead SOT | Yes | -40 °C to 150 °C |
| A3212LUA | 3-pin SIP | No | -40 °C to 150 °C |
| A3212LUA-T | 3-pin SIP | Yes | -40 °C to 150 °C |
相关型号：
A3212EEH A3212EEHLT-T A3212ELHLT A3213ELHLT-T A3213EUA-T A3212EUA A3212LUA A3213LUA-T A3214EUA-T
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