Allegro Distributor

A1388 and A1389 Miniature Factory Programmable Linears


Factory one-time programmable (OTP-ROM) linears that eliminate the need for customers to optimize/program the devices for their finished sensor assemblies


Allegro's A1388 and A1389 are factory one-time programmable (OTP-ROM)
linears that eliminate the need for customers to optimize/program the devices for their finished sensor assemblies. The A1388/89 builds on the flexibility and economic competitiveness of the A1381/2/3/4 devices.

The A1388 and A1389 architecturally have the ability to support a magnetic input sensitivity range of 2 to 4 mV/G, and 4 to 9mV/G, respectively. However, the A1388/89 devices initially being released to market are factory programmed to specific magnetic input sensitivity levels, via unique CASs for specific customer programming requirements.
Allegro's A1388 and A1389

Features Benefits
  • 5.0 V supply operation
  • Sensitivity temperature coefficient (TC) and QVO/QD temperature coefficient programmed at Allegro for improved accuracy
  • High-speed chopping scheme minimizes quiescent voltage output (QVO) drift across temperature
  • Wide ambient temperature range: –40°C to 150°C
  • Operates with 4.5 to 5.5 V supply voltage
  • Factory-programmed offset, sensitivity, and polarity
  • Temperature-stable QVO and sensitivity
  • Output voltage clamps provide short circuit diagnostic capabilities
  • Immune to mechanical stress
  • Enhanced EMC performance for stringent automotive applications

Digi-Key P/N Manufacturer P/N Description  
620-1503-1-ND A1388LLHLT-2-T IC SENSOR HALL EFFECT 5V SOT23W Datasheet
620-1502-1-ND A1389LLHLT-9-T IC SENSOR HALL EFFECT 5V SOT23W
620-1501-1-ND A1389LLHLT-RP9-T IC SENSOR HALL EFFECT 5V SOT23W
Available in Tape & Reel (-2-ND), Cut Tape (-1-ND), and custom Digi-Reel® (-6-ND)