A1101, A1102, A1103, A1104, and A1106
Continuous-Time Switch Family

Pin-Out or Package

Features and Benefits

Continuous-time operation
- Fast power-on time
- Low noise
Stable operation over full operating temperature range
Reverse battery protection
Solid-state reliability
Factory-programmed at end-of-line for optimum performance
Robust EMC performance
High ESD rating
Regulator stability without a bypass capacitor

Description

The Allegro® A1101-A1104 and A1106 Hall-effect switches are next generation replacements for the popular Allegro 312x and 314x lines of unipolar switches. The A110x family, produced with BiCMOS technology, consists of devices that feature fast power-on time and low-noise operation. Device programming is performed after packaging, to ensure increased switchpoint accuracy by eliminating offsets that can be induced by package stress. Unique Hall element geometries and low-offset amplifiers help to minimize noise and to reduce the residual offset voltage normally caused by device overmolding, temperature excursions, and thermal stress.

The A1101-A1104 and A1106 Hall-effect switches include the following on a single silicon chip: voltage regulator, Hall-voltage generator, small-signal amplifier, Schmitt trigger, and NMOS output transistor. The integrated voltage regulator permits operation from 3.8 to 24 V. The extensive on-board protection circuitry makes possible a ±30 V absolute maximum voltage rating for superior protection in automotive and industrial motor commutation applications, without adding external components. All devices in the family are identical except for magnetic switchpoint levels.

The small geometries of the BiCMOS process allow these devices to be provided in ultrasmall packages. The package styles available provide magnetically optimized solutions for most applications. Package LH is an SOT23W, a miniature low-profile surface-mount package, while package UA is a three-lead ultramini SIP for through-hole mounting. Each package is lead (Pb) free, with 100% matte tin plated leadframes.

Replacement Device Characteristics Table

Device A110x Characteristics BOPBRPHys Legacy Replacement Min Max Min Max Min Max

3141	A1101	30	175	10	145	20	80
3142	A1102	115	245	60	190	30	80
3143	A1103	205	355	150	300	30	80
3144	A1104	35	450	25	430	20	-
3121	A1106	260	430	160	330	70	140

Functional Block Diagram

A1101、A1102、A1103、A1104 和 A1106
连续开关系列

管脚分布

功能及优点

连续工作
- 快速上电
- 低噪音
在整个工作温度范围内稳定运行
电池反接保护
高可靠性
线编程使其具有最佳性能
可靠的 EMC 性能
高 ESD 保护额定值
无旁路电容的稳压器稳定性

描述

Allegro® A1101-A1104 和 A1106 霍尔效应开关是广受欢迎的 Allegro 312x 和 314x 系列单极开关的新一代替代产品。 A110x 系列采用 BiCMOS 技术生产，相关器件具有快速上电和低工作噪音的优点。器件编程在封装之后进行，可消除封装应力引起的偏移，从而确保更高的开关点精确度。独一无二的霍尔元件几何尺寸以及低偏移放大器有助于减少噪音，并降低通常由器件超模压、温度剧增和热应力引起的残余偏移电压。

A1101-A1104 和 A1106 霍尔效应开关在单硅片里包含以下元件：稳压器、霍尔电压发生器、小信号放大器、施米特触发器和 NMOS 输出晶体管。集成稳压器允许在 3.8 至 24 V之间进行操作。扩展型板载保护电路使 ±30 V绝对最大电压额定值成为可能，因而无需添加外部元件即可为汽车和工业电动机整流应用提供超卓保护。该系列中的所有器件除磁性开关点水平之外无任何差别。

BiCMOS 工艺小巧精致的几何尺寸让这些器件均能以超小型封装形式提供。现有的封装类型为大多数应用提供磁性最优化的解决方案。封装 LH 是 SOT23W 微型低厚度表面安装型封装，而封装 UA 是供过孔安装使用的三引脚超小型 SIP。所有封装均不含铅，引脚框采用 100% 雾锡电镀。