ATS684LSN Datasheet, PDF (1/16 Pages) Allegro MicroSystems – Two-Wire, Zero-Speed Differential Gear Tooth Sensor IC

ATS684LSN
Two-Wire, Zero-Speed
Differential Gear Tooth Sensor IC
FEATURES AND BENEFITS
• Integrated package solution offers EMI protection,
industry-proven IC, and back-bias magnet in a single
overmolded, user-friendly package
• Advanced algorithm design provides immunity to signal
perturbations from vibration, ferrous debris, target
eccentricities, and harsh automotive operating conditions
• Adaptive threshold sensing optimizes output performance
on a wide range of target types
• Integrated Scan, Iddq, and Built-In Self-Test capabilities
on an automotive-grade semiconductor process
provide dependability essential in the safety-conscious
automotive market
PACKAGE: 3-pin SIP (suffix SN)
Not to scale
DESCRIPTION
The ATS684LSN is an optimized, industry-proven, Hall-
effect integrated circuit (IC), rare-earth pellet, and high-
temperature ceramic capacitor in a single overmolded package.
The integrated capacitor reduces the need for external EMI
protection. The Hall-effect IC is a differential dual element
design capable of providing stable, signal perturbation-immune,
output performance for speed sensing applications. The
back-bias magnet creates a differential magnetic signal in the
presence of a rotating ferromagnetic target. This fully integrated
solution eliminates the need for additional manufacturing steps
throughout the supply chain, simplifying the overall system
design.
The single overmold design integrates the key operating
components to reduce mechanical tolerances and achieve
optimal operating performance every time. Built-in test
capability and an automotive-grade semiconductor process
ensures the quality and reliability that automotive companies
demand. The advanced algorithms and two-wire regulated
current output provide an ideal solution for obtaining edge
and duty cycle information in gear-tooth-based applications
such as transmission speed.
The ATS684 is provided in a lead (Pb) free 3-pin back-biased
SIP package (suffix SN) with tin leadframe plating.
VCC
Voltage
Regulator
Hall
Amp
Offset
Adjust
AGC
PDAC
Reference
Generator
+
and
Lockout
–
NDAC
Synchronous Digital Controller
ATS684LSN-DS, Rev. 7
GND
Functional Block Diagram
March 9, 2017