The Allegro A1366 factory-programmable linear Hall effect
current sensor IC has been designed to achieve high
accuracy and resolution. The goal is achieved through new
proprietary linearly interpolated temperature compensation
technology that is programmed at the Allegro factory, which
provides sensitivity and offset that are virtually flat across
the full operating temperature range. The flat performance
over temperature makes this IC ideally suited for current
sensing applications. Temperature compensation is done in
the digital domain with integrated EEPROM technology
without sacrificing the analog signal path bandwidth, making
this device ideal for HEV inverter, DC-to-DC converter, and
electric power steering (EPS) applications.
This ratiometric Hall-effect sensor IC provides a voltage output
that is proportional to the applied magnetic field. Sensitivity and
quiescent (zero field) output voltage are factory programmed
with high resolution which provides for an accuracy of less
than ±1%, typical, over temperature.
The sensor IC incorporates a highly sensitive Hall element with
a BiCMOS interface integrated circuit that employs a low noise,
small-signal high-gain amplifier, as well as a low-impedance
output stage, and a proprietary, high bandwidth dynamic offset
cancellation technique. These advances in Hall-effect technology
work together to provide an industry leading sensing resolution at
the full 120 kHz bandwidth. The device has built in broken ground
wire detection for high reliability in automotive applications.
Device parameters are specified across an extended ambient
temperature range: –40°C to 150°C. The A1366 sensor IC is
provided in an extremely thin case (1 mm thick), 4-pin SIP (single
in-line package, suffix KT) that is lead (Pb) free, with 100% matte
tin lead frame plating.
