New applications for linear output Hall-effect sensors, such as displacement and angular position, require higher accuracy and smaller package sizes. The Allegro A1388 and A1389 linear Hall-effect sensor ICs are designed to meet these requirements. Both surface-mount and through-hole plug-in packages feature these thermally stable devices.
The accuracy of each device can be improved through end-of-line optimization. Each device is equipped with a non-volatile memory that optimizes the device sensitivity and quiescent voltage output (QVO: output without a magnetic field) for a given application or circuit. The A1388 and A1389 also achieve optimal performance over the entire operating temperature range by programming the temperature coefficients in Allegro end-of-line testing for high sensitivity and QVO.
These proportional Hall-effect sensor ICs provide a voltage output proportional to the applied magnetic field. The quiescent voltage output can be adjusted to about 50% of the supply voltage.
With their unique features, these linear devices are ideal for automotive and industrial applications that require high accuracy and can operate in temperatures ranging from –40°C to 150°C.
Each BiCMOS monolithic circuit integrates Hall element temperature supplement circuitry that reduces Hall element intrinsic sensitivity drift, a small-signal high-gain amplifier, a clamping low-impedance output stage, and proprietary dynamic offset cancellation technology.
The A1388 and A1389 sensor ICs are available in two packages. LH is a SOT-23W miniature low-profile package for surface mount. UA is a three-pin ultra-miniature single-in-line package (SIP) for through-hole insertion. Both packages are lead-free (Pb) packages with 100% matte tin plated pin frames.
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5.0 V 电源供电
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Allegro 编程的 QVO 温度系数™有助于提高精确度
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小型封装选择
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高带宽、低噪音模拟输出
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高速斩波设计可最大限度地减少 QVO 在工作温度范围内的漂移
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温度稳定的静态电压输出及灵敏度
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温度周期性变化后精确的可恢复性
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输出电压钳位具有短路诊断功能
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欠压锁定 (UVLO)
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较宽的环境温度范围：–40°C 到 150°C
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抗机械应力
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更高的 EMC 性能，满足严格的汽车应用要求