Product Overview

The Allegro A1101-A1104 and A1106 Hall-effect switches are advanced BiCMOS-based devices designed as replacements for the 312x and 314x series. They offer fast power-on times, low-noise operation, and high switchpoint accuracy due to post-packaging programming that minimizes induced offsets. Their design incorporates unique Hall element geometries and low-offset amplifiers to reduce noise and residual offset voltage from overmolding, temperature variations, and thermal stress. These integrated switches include a voltage regulator, Hall-voltage generator, small-signal amplifier, Schmitt trigger, and NMOS output transistor. The integrated voltage regulator supports operation from 3.8 to 24 V, and extensive on-board protection circuitry allows for a 30 V absolute maximum voltage rating, eliminating the need for external components in automotive and industrial motor commutation applications. All devices in the family share identical features except for their magnetic switchpoint levels. The BiCMOS process enables small geometries, allowing for ultra-small package options. Package LH is a miniature SOT23W surface-mount package, while package UA is a three-lead ultramini SIP for through-hole mounting. All packages are lead (Pb) free with 100% matte-tin-plated leadframes.

Product Attributes

• Brand: Allegro
• Technology: BiCMOS
• Certifications: AEC-Q100 automotive qualified
• Packaging: SOT23W (LH), SIP (UA)
• Lead Finish: 100% matte-tin-plated
• Lead (Pb) Free: Yes

Technical Specifications