Hall-effect bipolar switch is optimised for pulsed power

The A1205 is a BiCMOS continuous-time device featuring a very short 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 minimise noise and to reduce the residual offset voltage normally caused by device overmoulding, temperature excursions, and thermal stress.

The device incorporates, on a single silicon chip, a 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.

Extensive on-board protection circuitry, including reverse battery protection and output short-circuit protection, makes possible a ±30 V absolute maximum voltage rating for superior operation in automotive and motor commutation applications, without the need to add external components.

The A1205 is available in two package options: LH (SOT-23W), a miniature thin-profile surface-mount package, and UA, a 3-lead ultraminiature single-inline package for through-hole mounting. Each package is lead (Pb) free, with a 100% matt tin-plated leadframe.