True power-on multiturn magnetic sensor records rotations of an external magnetic system even while unpowered. The sensor counts up to 46 turns and reports absolute position through an SPI interface after power-up. It provides greater than 16,000 degrees of digital output, ±0.25 degree angle accuracy, and a 100 kSPS measurement update rate. The device operates from a 3.3 V IC supply, supports 1.7 V to 5 V SPI interface levels, and is specified across a −40°C to +150°C junction temperature range.
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| Sensor type | True power-on multiturn magnetic position sensor |
| Turn count range | 46turns |
| Digital output range | >16000° |
| Angle accuracy | ±0.25° |
| Measurement update rate | 100kSPS |
| Magnetic field operating range | 16 to 31mT |
| IC supply voltage | 3.3V |
| SPI interface voltage | 1.7 to 5V |
| Interface | SPI |
| Junction temperature range | -40 to +150°C |
| Package | 24-pin TSSOP |
| Temperature sensor | Internal |
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These are design resources that include the Analog Devices ADMT4000BRUZAB
Evaluation platform for the ADMT4000 zero power multiturn sensor, featuring SPI communication, magnetic reset circuitry, and GUI-based data logging and configuration.
