ATS19580
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
FEATURES AND BENEFITS
DESCRIPTION
• Fully integrated solution has GMR IC, protection
capacitor, and back-bias magnet in a single in-line
overmolded package
• Innovative GMR technology provides large operational
air gap sensing on ferromagnetic targets
• Advanced algorithms for flexible design-in and system
compensation
TheATS19580 is a giant magnetoresistance (GMR) integrated
circuit (IC) that provides a user-friendly two-wire solution for
applicationswherespeedanddirectioninformationisrequired
using ferromagnetic gear tooth targets. The fully integrated
package includes the GMR IC, a protection capacitor for EMC
robustness, and a back-bias magnet in a single in-line package.
The GMR-based IC is designed for use with ferromagnetic
gear tooth targets and is orientation-compatible with Hall-
effect technology. The fully integrated solution senses at large
operating air gaps and over a large air gap range. State-of-the-
art GMR technology on a monolithic IC with industry-leading
signal processing provides accurate speed and direction
information in response to low-level differential magnetic
signals. The differential sensing offers inherent rejection of
interfering common-mode magnetic fields.
□ Advanced vibration algorithms guarantee valid
direction information
□ Automatically adapts to extreme mechanical changes
(air gap) and thermal drifts
• Measures differentially to reject common-mode stray
magnetic fields
• Orientation compatible with Hall-effect technology
• Integrated ASIL diagnostics and certified safety design
process (optional fault reporting)
IntegrateddiagnosticsareusedtodetectanICfailurethatwould
impactoutputprotocolaccuracy,providingcoveragecompatible
withASILB(assessmentpending). Built-inEEPROMscratch
memory offers traceability of the device throughout the IC’s
product lifecycle. ASIL reporting can be enabled or disabled
as a product offering depending on the applications’ needs.
2
-
PACKAGE: 3-pin SIP (suffix SN)
The ATS19580 is provided in a lead (Pb) free 3-pin SIP
package with tin leadframe plating. The SN package includes
a GMR IC, a magnet, and capacitor integrated into a single
overmold, with an additional molded lead-stabilizing bar for
robust shipping and ease of assembly.
Not to scale
VCC
+
ADC
GMR
Elements
Output
-
Current
ESD
Generator
Analog-to-Digital
and
Signal Conditioning
Digital
Controller
Front End
Amplification
+
-
ADC
GND
Regulator
Oscillator
EEPROM
Diagnostics
Functional Block Diagram
ATS19580-DS, Rev. 2
MCO-0000925
November 18, 2020