Have Questions? Let us help!
We're passionate about innovation. Reach out and you'll hear back from an expert shortly.
One of our solution experts will be in touch with you shortly. Keep reading to learn more about our industry leading solutions.
The A1128 is a field-programmable, unipolar Hall-effect switch designed for use in high-temperature applications. This device uses a chopper-stabilization technique to eliminate offset inherent in single-element devices.
The devices are externally programmable. A wide range of programmability is available on the magnetic operate point, BOP , while the hysteresis remains fixed. This advanced feature allows optimization of the sensor IC switchpoint and can drastically reduce the effects of mechanical placement tolerances found in end-use production environments.
A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset voltage, which is normally caused by device overmolding, temperature dependencies, and thermal stress. Having the Hall element and amplifier in a single chip minimizes many problems normally associated with low-level analog signals.
Two package styles provide a magnetically optimized package for most applications. Type LT is a miniature SOT89/TO-243AA surface mount package that is thermally enhanced with an exposed ground tab, and type UA is a three-lead ultramini SIP for through-hole mounting. The packages are lead (Pb) free, with 100% matte tin plated leadframes.
The A1128LLTTR-T package variant status is Last-Time Buy. This indicates this package variant has reached the end of its life cycle and will no longer be offered by Allegro. This package variant is considered obsolete and customer notification has been provided. All orders are accepted as final builds. Samples are no longer available. Recommended replacement: A1128LUATS-T.
Type LT is a miniature SOT89/TO-243AA surface mount package that is thermally enhanced with an exposed ground tab, and type UA is a three-lead ultramini SIP for through-hole mounting. The packages are lead (Pb) free, with 100% matte tin plated leadframes.
|Document Type||Document Name|
|Application Note||Handling, Storage, and Shelf Life of Semiconductor Devices|
|Application Note||Allegro Hall-Effect Sensor ICs|
|Application Note||Allegro Microsystems - Chemical Exposure of Devices|
|Brochure||Brochure: Driving Change by Advancing Personal Mobility Through Cutting-Edge Technology|
|Guide||Guidelines for Designing Subassemblies Using Hall-Effect Devices|
|Guide||Hall-Effect IC Applications Guide|
|Technical Article||Soldering Methods for Allegro Products (SMD and Through-Hole)|