Product Overview
The Allegro A33002 is a contactless 360 angle sensor IC utilizing Circular Vertical Hall (CVH) technology to provide high-resolution angular position data. Its system-on-chip (SoC) architecture integrates a CVH front end, digital signal processing for angle calculation, and selectable output protocols including SPI, SENT, and PWM. The device features on-chip EEPROM for flexible programming of calibration parameters with up to 100 read/write cycles. With on-chip 32-segment linearization, it corrects for misalignment and imperfect magnet magnetization, enhancing accuracy. The A33002 is designed for safety-critical automotive applications such as electronic power steering (EPS), transmission actuators, and BLDC pumps, supporting customer integration in accordance with ISO 26262 requirements, with single-die versions targeting ASIL B and dual-die versions targeting ASIL D. It operates across a wide temperature range (40C to 150C) and supports various programming interfaces including SPI and a unique Manchester protocol on the VCC line.
Product Attributes
- Brand: Allegro MicroSystems
- Technology: Circular Vertical Hall (CVH)
- Certifications: Developed in accordance with ISO 26262 requirements for hardware product development for use in safety-critical applications.
- Package: 14-pin TSSOP (Suffix LE)
- Material: Lead (Pb) free with 100% matte tin leadframe plating.
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Angle Measurement | Contactless 0 to 360 | Angular position, rotational speed, and direction measurement |
| Resolution | Up to 12-bit effective resolution | Sensing magnetic field strength up to 900 G |
| Linearization | On-chip 32-segment | Improves angle accuracy by correcting misalignment and imperfect magnetization |
| Output Protocols | Selectable | SPI, SENT, PWM |
| Programming | On-chip EEPROM | Up to 100 read/write cycles; Programmable via Manchester encoding on VCC/VOUT lines or SPI |
| Safety Integrity Level (ASIL) | ASIL B (single-die) / ASIL D (dual-die) | When integrated and used in conjunction with appropriate system-level control, as prescribed in the A33002 Safety Manual |
| Operating Voltage | 3.7 V to 5.5 V | Absolute maximum of 28 V |
| Operating Temperature | 40C to 150C | Ambient temperature range |
| SPI Clock Frequency | Up to 10 MHz | Supports 16-, 17-, or 20-bit packet lengths with optional 4-bit CRC |
| SENT Tick Time | 0.5 s to 7.9375 s | Configurable via EEPROM |
| PWM Carrier Frequency | Configurable | 128 selectable frequencies ranging from 98 Hz to 3.125 kHz |
| Angle Error (Typical) | 0.4 @ 25C | With ideal magnet alignment and 300 G field |
| Angle Noise (3-sigma) | 0.19 | @ 25C, 300 G, no internal filtering |
| Turns Counting | Integrated | Supports up to 256 full mechanical rotations; configurable initialization |
| Package Dimensions | 14-pin TSSOP | 1 mm thin package to minimize air gap |
| Models | A33002LLEATR (Single Die) | Available in 3.3 V or 5.0 V interface |
| Models | A33002LLEBTR-DD (Dual Die) | Available in 3.3 V interface |
2401241357_ALLEGRO-A33002LLEBTR-DD_C3716291.pdf
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