Omnipolar/Bipolar/Unipolar Digital Latch

CT811x, CT812x, CT813x

CT811x, CT812x, CT813x package image

The CT81xx series of magnetic sensors offer stable magnetic operation over the operating temperature range. With very high sensitivity, the CT81xx products enable larger air gaps or smaller size/lower cost magnets to be used in systems while also drawing supply current as low as 110 nA. As such, these magnetic sensors are ideal for battery operated products where minimal current consumption is required.

Description

Top Features

Typical Applications

Packaging

The CT81xx is a product family of Tunnel Magneto-resistance (TMR) digital latches and analog sensors that are designed for consumer and industrial applications. They are based on Allegro MicroSystems’ patented XtremeSense™ TMR technology with integrated CMOS process to provide a monolithic solution for superior sensing performance. The CT81xx series of magnetic sensors offer stable magnetic operation over the operating temperature range. With very high sensitivity, the CT81xx products enable larger air gaps or smaller size/lower cost magnets to be used in systems while also drawing supply current as low as 110 nA. As such, these magnetic sensors are ideal for battery operated products where minimal current consumption is required. The outputs for both the digital latches and analog sensors are ratio-metric which provide greater design flexibility when interfacing with a variety of micro controllers.

Available in an industry standard 3-lead SOT23, 5-lead SOT23 and small form factor 4-lead LGA packages to support both consumer and industrial applications.

  • High Sensitivity: BOP/BRP = ±0.9 mT/±0.5 mT
  • Sensor Polarity
    • Omnipolar - CT813x & CT815x
    • Bipolar - CT812x
    • Unipolar - CT811x
  • Current Consumption: as Low as 110 nA @ VDD = 1.8 V and fS = 2 Hz
  • Digital CMOS Outputs:
    • Push-pull
    • Open Drain
  • Supply Voltage: 1.7 V to 5.5 V
  • Under Voltage Lock-out (UVLO)
  • Low Profile and Small Form Factor Packages that are ROHS and Green Compliant:
    • 3-lead SOT23
    • 5-lead SOT23
    • 4-lead LGA, 1.45 x 1.45 x 0.44 mm
  • IoT Devices
  • Smartphones, Tablets and Laptops
  • Door or Lid Closure
  • Reed Switch Replacement
  • Tamper-proofing for Utility Smart Meters
  • Fluid Level Sensing/Detection
  • Proximity Detection
  • Motor Controllers
  • Gimbals for Camera Systems in Drones/UAVs
  • Industrial Machinery/Robots
  • Medical Devices

Available in an industry standard 3-lead SOT23, 5-lead SOT23 and small form factor 4-lead LGA packages to support both consumer and industrial applications.

Part Number Specifications and Availability

Allegro's XtremeSense™ TMR technology

Superior magnetic sensitivity, low power consumption, and compact size compared to other technologies, driving innovation in applications like renewable energy, electric vehicles, and consumer electronics.

Learn More

Allegro's XtremeSense™ TMR technology

Superior magnetic sensitivity, low power consumption, and compact size compared to other technologies, driving innovation in applications like renewable energy, electric vehicles, and consumer electronics.

Learn More

Documentation and Resources

Documentation

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