Linear outputHall-effect sensorsNew applications, such as displacement and angular positions, require high accuracy and redundant outputs. Allegro A1359Programmable linear Hall-effect sensorICs are designed for both requirements. The features associated with this linear device are ideal for automotive and industrial applications that require high accuracy, and this temperature-stable device can operate over a wide temperature range: –40°C to 150°C.
The accuracy of the device is improved through programmability at the Allegro factory, which optimizes device sensitivity, quiescent voltage output (QVO: output without magnetic field), and quiescent duty cycle (QD) for a given application or circuit. By programming the temperature coefficient in Allegro end-of-line tests for high sensitivity and QVO/QD, the A1359 also achieves optimal performance over the entire operating temperature range. This ratiometric Hall-effect sensor IC provides an analog voltage proportional to the applied magnetic field and a PWM signal with duty cycle.
Each BiCMOS monolithic circuit incorporates Hall element temperature compensation circuitry that reduces the inherent sensitivity drift of the Hall element, a small-signal high-gain amplifier, a clamped low-impedance output stage, and a proprietary dynamic offset cancellation technique.
The A1359 features an 8-contact surface-mount TSSOP (suffix LE) package that is lead (Pb) free and features 100% matte tin leadframe plating.
- Dual tracking outputs: analog voltage output and pulse-width modulated (PWM) output
- Matched analog and PWM outputs allow the user to detect a variety of output error conditions
- Factory programmed offset, sensitivity, and polarity
- Temperature coefficient of sensitivity (TC) and QVO/QD temperature coefficient programmed in Allegro® for higher accuracy
- High-speed chopping mode minimizes quiescent output voltage (QVO) drift across temperature
- Temperature-stable QVO and sensitivity
- The output voltage clamp has a short-circuit diagnostic function
- Wide ambient temperature range: –40°C to 150°C
- Resistant to mechanical stress
- Higher EMC performance for stringent automotive applications