These parts are in production but have been determined to be NOT FOR NEW DESIGN.
This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Date of status change: May 3, 2022.
We recommend the A1308 as a replacement part.
New applications for linear output Hall-effect sensors—such
as displacement and angular position—require higher accuracy
and smaller package sizes. The Allegro A1388 and A1389
linear Hall-effect sensor ICs have been designed specifically to
meet both requirements. These temperature-stable devices are
available in both surface-mount and through–hole packages.
The accuracy of each device is enhanced via end-of-line
optimization. Each device features non-volatile memory to
optimize device sensitivity and the quiescent voltage output
(QVO: output in the absence of a magnetic field) for a given
application or circuit. This A1388 and A1389 optimized
performance is sustained across the full operating temperature
range by programming the temperature coefficient for both
sensitivity and QVO at Allegro end-of-line test.
These ratiometric Hall-effect sensor ICs provide a voltage
output that is proportional to the applied magnetic field. The
quiescent voltage output is adjusted around 50% of the supply
voltage.
The features of these linear devices make them ideal for use in
automotive and industrial applications requiring high accuracy,
and they operate across an extended temperature range,
–40°C to 150°C.
Each BiCMOS monolithic circuit integrates a Hall element,
temperature-compensating circuitry to reduce the intrinsic
sensitivity drift of the Hall element, a small-signal high-gain amplifier,
a clamped low-impedance output stage, and a proprietary dynamic
offset cancellation technique.
The A1388 and A1389 sensor ICs are offered in two package
styles. The LH is a SOT-23W style miniature low–profile package
for surface-mount applications. The UA is a 3-pin ultramini single
inline package (SIP) for through-hole mounting. Both packages are
lead (Pb) free, with 100% matte–tin leadframe plating.
