Programmable Hall-effect ICs – The A1388 and A1389

Allegro MicroSystems, LLC Corporation adds two new factory one-time programmable (OTP-ROM) linear Hall ICs to their active portfolio. These devices remove the need for customers to optimize/program the devices for their completed sensor assemblies. Allegro’s A1388 and also A1389 architecturally have the ability to support the magnetic input level of responsiveness range of 2.3 to 4.0 mV/G, and 4.0 to 9.0 mV/G, respectively. However, the A1388 and A1389 devices at first being released to market are factory programmed to specific magnetic input awareness levels. Initially unveiled device types incorporate:

a. A1388LLHLX-2-T with 2.5 mV/G sensitivity

b. A1389LLHLX-9-T with 9 mV/G level of sensitivity

c. A1389LLHLX-RP9-T with -9 mV/G level of sensitivity

The temperature coefficients for both sensitivity and the quiescent present output (QVO) are hard-wired over temperature from Allegro to maximize accuracy and reduce distribution tolerances. The actual A1388 and A1389 provide reduced output noise (15 mV (p-p) @ 9.0 mV/G sensitivity for the A1389) and improved EMI susceptibility from various frequencies. Additionally they support a fast refresh rate of Something like 20 KHz for high bandwidth apps.

The A1388 and A1389 IC are generally targeted at the car, industrial and consumer markets and are currently being offered in a small LH (SOT-23W) surface area mount package.

Pricing for 1,000 pieces is as follows:

a. A1388LLHLX-2-T $1.06

b. A1388LLHLT-2-T $1.08

c. A1389LLHLX-9-T $10.6

d. A1389LLHLT-9-T $1.08

e. A1389LLHLX-RP9-T $1.06

f. A1389LLHLT-RP9-T $1.08

Declare

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Programmable Hall-effect ICs – The A1388 and A1389

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