ALLEGRO A1315LLHLT-5-T

New applications for linear output Hall-effect sensors, such as displacement and angular position sensing, demand greater accuracy and smaller package sizes. The Allegro A1315 linear Hall-effect sensor IC is specifically designed to meet both requirements. These temperature-stable devices are available in surface-mount and through-hole package styles. The accuracy of each device is enhanced through end-of-line optimization. Each device incorporates nonvolatile memory, allowing the device sensitivity and quiescent voltage output (QVO: output with no applied magnetic field) to be optimized for a given application or circuit. By programming the temperature coefficients of sensitivity and QVO during Allegro's end-of-line testing, the optimized performance of the A1315 is maintained across the entire operating temperature range. These ratiometric Hall-effect sensor ICs provide a voltage output proportional to the applied magnetic field. The quiescent voltage output is centered at approximately 50% of the supply voltage. The characteristics of these linear devices make them well suited for automotive and industrial applications requiring high accuracy over an operating temperature range of -40°C to 150°C. Each BiCMOS monolithic circuit integrates a Hall element, temperature compensation circuitry to reduce 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 A1315 sensor IC is available in two package styles. The LH is a miniature, low-profile SOT-23W style package for surface-mount applications. The UA is a 3-pin ultra-mini single inline package (SIP) for through-hole mounting. Both packages are lead-free (Pb-free) with 100% matte tin leadframe plating.

• 3.3V supply operation
• QVO temperature coefficient programmed at Allegro for improved accuracy
• Miniature package options
• High bandwidth, low-noise analog output
• High-speed chopper scheme minimizes QVO drift over operating temperature range
• Temperature-stable quiescent voltage output and sensitivity
• Precise recoverability after temperature cycling
• Output voltage clamp provides short-circuit diagnostic capability
• Undervoltage lockout (UVLO)
• Wide ambient temperature range: -40°C to 150°C
• Mechanical stress resistance
• Enhanced EMC performance for demanding automotive applications

Automotive and Industrial Applications