The new device, which is available in different package styles to provide an optimum configuration for most applications, is suited for operation over extended temperature ranges up to +150°C. Superior high temperature performance is made possible through dynamic offset cancellation, reducing the residual offset voltage normally caused by device overmoulding, temperature dependencies, and thermal stress.
The A1222 includes, on a single silicon chip, a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilisation circuitry, a Schmitt trigger, and a short-circuit protected open-collector output that can sink up to 25 mA.
An on-board regulator permits operation with supply voltages from 3.0 to 24 V. Significant advantages are realised by reducing the minimum operating voltage. This device can be used in 3 V applications, and additional external resistance can be added in series with the supply pin for greater protection against transient events.
Two package styles provide a magnetically optimised configuration for most applications. Package type LH is a modified SOT23W surface-mount package, while the UA is a three-lead, ultra-mini-SIP for through-hole mounting. Each package type is available as lead (Pb) free (suffix, -T), with a 100% matt tin-plated lead frame.