Product Overview
The AS5145 is a 12-bit programmable magnetic rotary encoder designed for accurate angular measurement over a full 360-degree turn. This system-on-chip integrates Hall elements, analog front end, and digital signal processing. It requires only a simple two-pole magnet for operation, offering instant absolute angle indication with a resolution of 0.0879 (4096 positions per revolution). The digital data is available via serial bit stream (SSI) and PWM signal. It supports both 3.3V and 5V supply voltages, providing high reliability, durability, and user-programmable zero position. Its failure diagnostics capabilities monitor magnet placement and power supply loss. The AS5145 is ideal for motor applications with rational speeds up to 30,000 rpm and offers easy setup with Daisy Chain mode for multiple interconnected devices.
Product Attributes
- Brand: ams
- Certifications: AEC-Q100, grade 0 (Automotive Qualified)
- Package: SSOP 16 (5.3mm x 6.2mm)
- Temperature Range: -40C to 150C
Technical Specifications
| Parameter | Condition | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|---|
| Operating Conditions | ||||||
| Ambient temperature | Version H/A/B | -40 | 150 | C | ||
| Supply current | 16 | 21 | mA | |||
| DC supply voltage at pin VDD5V | 5V operation | 4.5 | 5.0 | 5.5 | V | |
| Voltage regulator output voltage at pin VDD3V3 | 3.0 | 3.3 | 3.6 | V | ||
| DC supply voltage at pin VDD5V | 3.3V operation (pin VDD5V and VDD3V3 connected) | 3.0 | 3.3 | 3.6 | V | |
| Supply voltage at pin VDD3V3 | 3.0 | 3.3 | 3.6 | V | ||
| Power-on reset thresholds On voltage (VDD3V3) | 3.3V | 1.37 | 2.2 | 2.9 | V | 300mV typ. hysteresis |
| Power-on reset thresholds Off voltage | 1.08 | 1.9 | 2.6 | V | 300mV typ. hysteresis | |
| Programming Conditions | ||||||
| Programming voltage | Voltage applied during programming | 3.3 | 3.6 | V | ||
| Programming voltage off level | Line must be discharged to this level | 0 | 1 | V | ||
| Programming current | 100 | mA | ||||
| Programmed fuse resistance (log 1) | 10A max. current @ 100mV | 10k | ||||
| Unprogrammed fuse resistance (log 0) | 2mA max. current @ 100mV | 50 | 100 | |||
| DC Characteristics CMOS Schmitt-Trigger Inputs: CLK, CSn | ||||||
| High level input voltage | Normal operation | 0.7 * VDD5V | V | |||
| Low level input voltage | 0.3 * VDD5V | V | ||||
| Schmitt Trigger hysteresis | 1 | V | ||||
| Input leakage current | CLK only | -1 | 1 | A | ||
| Pull-up low level input current | CSn only, VDD5V: 5.0V | -30 | -100 | |||
| DC Characteristics CMOS / Program Input: PDIO | ||||||
| High level input voltage | 0.7 * VDD5V | VDD5V | V | VPROG (1) | ||
2411220317_AMS-AS5145B-HSSM_C481877.pdf
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