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High-Performance Power ICs and Hall-Effect Sensors
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Datasheets:
ATS616LSG: Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear Tooth Sensor (PDF)
Selection Guides:
Hall-Effect Sensors,
Gear-Tooth Hall-Effect Speed Sensors
Press Releases:
ATS616LSG: Allegro MicroSystems, Inc. Introduces Analog Self-Calibrating Speed Sensor
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ATS616LSG
Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear
Tooth Sensor
These parts are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Date of status change: May 4, 2009.
For existing customer transition, and for new customers or new applications, refer to the ATS617.
Features and Benefits
- Self-calibrating for tight timing accuracy
- First-tooth detection
- Immunity to air gap variation and system offsets
- Eliminates effects of signature tooth offsets
- Integrated capacitor provides analog peak and valley information
- Extremely low timing-accuracy drift with temperature changes
- Large air gap capability
- Small, integrated package
- Optimized magnetic circuit
- Undervoltage lockout (UVLO)
- Wide operating voltage range
Description
The ATS616 gear-tooth sensor is a peak-detecting device that uses automatic gain control and an integrated capacitor to provide extremely accurate gear edge detection down to low operating speeds. Each sensor module consists of a high-temperature plastic shell that holds together a samarium-cobalt magnet, a pole piece, and a differential open-collector Hall IC that has been optimized to the magnetic circuit. This small package can be easily assembled and used in conjunction with a wide variety of gear shapes and sizes.
The gear-sensing technology used for this sensor module is Hall-effect based. The sensor incorporates a dual-element Hall IC that switches in response to differential magnetic signals created by ferrous targets. The sophisticated processing circuitry contains an A-to-D converter that self-calibrates (normalizes) the internal gain of the device to minimize the effect of air-gap variations. The patented peakdetecting filter circuit eliminates magnet and system offsets and has the ability to discriminate relatively fast changes such as those caused by tilt, gear wobble, and eccentricities. This easy-to-integrate solution provides first-tooth detection and stable operation to extremely low rpm. The ATS616 can be used as a replacement for the ATS612LSB, eliminating the external peak-holding capacitor needed by the ATS612LSB.
The ATS616 is ideal for use in systems that gather speed, position, and timing information using gear-tooth-based configurations. This device is particularly suited to those applications that require extremely accurate duty cycle control or accurate edge-detection, such as automotive camshaft sensing.
The ATS616 is provided in a 4-pin SIP that is Pb (lead) free, with a 100% matte tin plated leadframe.
Functional Block Diagram
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| ATS616LSGTN-T | 4-lead module | Yes | view data | -40 °C to 150 °C | not for new design |
Contact Local Sales Representative or check distributor stock |
Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.