# Magnetic Angle Sensor # 3D Hall Sensor # Motor Control # Domestic Substitution # Magnetic Encoder

Traditional optical‑electrical encoders are highly susceptible to dust, vibration and temperature variations. They require zero‑point calibration upon power‑on and come with relatively large form factors. A growing number of motion‑control projects are shifting toward non‑contact magnetic angle‑sensing solutions.

Today, we introduce the CONNTEK KTH5502 Series, a flagship offering from Junmin Technology. This high‑precision 3D‑Hall magnetic angle sensor is built on vertical‑Hall technology. It achieves 0‑360° full‑range absolute‑position measurement on a single chip. Supporting multiple interfaces and housed in a compact package, it facilitates device miniaturization and domestic‑substitution upgrades.

✅ Full‑range Angle Measurement: 0‑360° absolute‑angle output. Position can be read directly upon power‑on; homing is not required 

✅ Resolution: 16‑bit digital angle resolution. Typical integral non‑linearity ±1.0°, maximum ±2° 

✅ Wide Supply Voltage: 1.7V‑3.6V, compatible with lithium‑battery and 3.3V industrial systems 

✅ Wide Operating Temperature: ‑40℃ ~ +125℃, industrial‑grade temperature coverage 

✅ Power Consumption: Typical operating current 4‑6 mA 

✅ Maximum Rotational Speed: Supports continuous rotation up to 5000 RPM 

✅ AB Quadrature Encoding: Up to 1024 lines per revolution, capable of directly replacing incremental encoders 

✅ Two Package Options 

SOP‑8L: 5.0×4.0 mm, for general SMT mounting 

DFN‑8L: 2.0×2.0 mm ultra‑compact package, ideal for extremely space‑constrained applications

The biggest highlight of the KTH5502 lies in its exceptionally rich interface options. A single chip supports multiple output modes, which can be switched simply via the MODE pin to adapt to varying hardware resources of different MCUs:

• I²C: Standard/Fast‑mode (100K‑400 kHz). The base version supports I²C address switching through the A0 pin, enabling multiple chips to share the same bus.

• SPI: 3‑wire Mode 3, maximum 5 MHz clock rate with CRC8 data checksum to improve communication reliability under industrial conditions.

• AB Quadrature Encoding: Push‑pull A/B‑phase output, programmable resolution from 12‑1024 lines, for direct connection to encoder interfaces.

• PWM Output: Two configurable rates: 972 Hz (13‑bit) / 486 Hz (14‑bit), well‑suited for long‑distance transmission.

• Analog Voltage Output (Standard‑line‑count variant): Output voltage varies linearly with angle and can be directly sampled by the MCU’s ADC.

The chip exposes multiple sets of registers and supports user‑side software parameter tuning:

✔ Angle Zero‑point Trimming: 16‑bit parameter to correct mechanical zero‑point deviation caused by installation 

✔ Gain and zero‑point trimming for analog output to calibrate analog‑output offset 

✔ ADC oversampling configuration to balance noise performance and response speed 

✔ Adjustable digital‑filter stages for magnetic‑field noise suppression 

✔ CM continuous‑measurement mode with configurable measurement interval, balancing refresh rate and power consumption

• Motor Control: Closed‑loop position feedback for BLDC brushless motors and stepper motors

• Robot Joints & Collaborative Robots: Joint‑angle detection

• Gimbal Stabilizers & Hand‑held Stabilization Devices

• Joysticks, Game Controllers, Industrial Smart Knobs and Control Panels

• Valve Opening and Steering‑angle Position Detection

• Direct replacement for traditional optoelectronic encoders, enabling cost‑reduction, miniaturization and maintenance‑free design

To achieve optimal chip performance, please observe the following hardware‑design requirements:

• Magnet Recommendation: 2‑pole radially‑magnetized cylindrical magnet. Preferred dimension: φ6 mm, thickness 2.5 mm.

• Air‑gap: 0.5‑2.0 mm between magnet surface and chip surface; 1 mm is recommended.

• Alignment Requirement: Offset between magnet center and chip Hall‑sensing center shall be less than 0.3 mm.

• Magnetic‑field Strength: In‑plane magnetic field at chip surface: 200‑1000 Gauss.

• PCB Layout: Place 100 nF + 10 μF decoupling capacitors close to VDD‑GND. Minimize copper area around the sensor and keep away from inductors and strong magnetic interference sources.

• SOP‑8L: KTH5502HVPSP8 (base 12‑line), multi‑line‑count variants: AB50 / 100 / 128 / 256 / 512 / 1024

• DFN‑8L: KTH5502HVPDN8 (base 12‑line), line‑count variants ranging from AB50 to AB1024

• Variants with different line counts suit various rotational‑speed scenarios. Pay attention to the maximum‑speed limit for high‑line‑count versions.

• Featuring vertical‑Hall technology, full‑interface coverage, dual‑package options and industrial‑grade wide‑temperature range, the KTH5502 delivers a cost‑effective domestic solution for motor closed‑loop control and angular‑position detection. It is well‑worth adding to your component shortlist for both new‑project development and localization substitution of imported sensors.

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