Product Overview
The ATS19200 is an optimized Hall-effect integrated circuit (IC) designed for true zero-speed digital gear tooth sensing in two-wire applications. It integrates a rare-earth pellet and a high-temperature ceramic capacitor within a single overmolded package, enhancing EMC robustness and simplifying design-in. The device features an advanced threshold switching algorithm for high accuracy over a wide operating air gap range and supports ASIL B(D) compliance through integrated diagnostics and a certified safety design process. Its EEPROM provides device traceability, and the two-wire current source output is compatible with speed and ASIL protocols. Ideal for automotive and two-wheeler braking systems, it offers air gap independent switchpoints and mitigates system anomalies.
Product Attributes
- Brand: Allegro MicroSystems
- Package Type: 3-pin SIP (suffix SN)
- Lead Free: Yes (Pb free)
- Certifications: ASIL B(D) rating
- Material: High-temperature ceramic capacitor
Technical Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Nominal Capacitance | CSUPPLY | Connected between VCC and GND | 2.2 | nF | ||
| Supply Voltage | VCC | Operating, TJ < TJ (max) | 4 | 24 | V | |
| Undervoltage Lockout | VCC(UV) | VCC 0 5 V or 5 0 V | 3.5 | 3.95 | V | |
| Supply Current (LOW) | ICC(LOW) | Low-current state | 5.9 | 8.4 | mA | |
| Supply Current (HIGH) | ICC(HIGH) | High-current state | 12 | 16 | mA | |
| Output Rise Time | tr | CSUPPLY, RSENSE = 100 | 0 | 1.5 | s | |
| Output Fall Time | tf | CSUPPLY, RSENSE = 100 | 0 | 1.5 | s | |
| Operating Frequency | fOP | 0 | 5 | kHz | ||
| Operate Point | BOP | % of peak-to-peak BSIG, AGOP within specification | 60 | % | ||
| Release Point | BRP | % of peak-to-peak BSIG, AGOP within specification | 40 | % | ||
| Operational Air Gap Range | AGOP | Using Allegro Reference Target 60-0, duty cycle within specification | 0.5 | 2.5 | mm | |
| Extended Operational Air Gap Range | AGEXT | Using Allegro Reference Target 60-0, output switching (no missed edges), duty cycle not guaranteed | 3 | mm | ||
| Output Duty Cycle | D | Using Reference Target 60-0, static air gap, AG within specification | 40 | 60 | % | |
| Package Thermal Resistance | RJA | Single layer PCB, with copper limited to solder pads | 150 | C/W |
Features and Benefits
- Integrated back-bias magnet for simplified design-in with ferromagnetic gear targets.
- Integrated capacitor enhances EMC robustness within a single overmolded package.
- Advanced threshold switching algorithm ensures high pitch and duty cycle accuracy across the operating air gap range.
- ASIL B(D) rating achieved through integrated diagnostics and a certified safety design process.
- EEPROM provides device traceability throughout the production process.
- Two-wire current source output supports speed and ASIL protocols.
- True zero-speed digital gear tooth sensing capability.
- Sophisticated compensating circuit eliminates magnetic and system offsets.
- Digital tracking of analog signals ensures high accuracy for pitch and duty cycle.
- Advanced calibration algorithms provide air gap independent switchpoints, improving accuracy and mitigating system anomalies.
- Integrated diagnostics detect IC failures impacting output protocol accuracy, compatible with ASIL B(D) compliance.
- User-friendly solution for two-wire applications.
2404071023_ALLEGRO-ATS19200LSNATN-L-A_C3349561.pdf
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