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New Product Release | KTH7112 16-bit High-Precision Magnetic Encoder, All-in-One Angle Sensing Solution with Multi-Interface Support
2026.07.22
25 次
KTH7112
KTH7112






16-bit High-Precision Magnetic Encoder, Versatile Multi-Interface Angle Sensing Solution – KTH7112



Product Introduction


Engineers engaged in motion control and motor closed-loop systems, are you constantly plagued by these challenges?
Optical encoders are vulnerable to dust and oil contamination and require tight mounting tolerances; conventional magnetic encoders suffer from insufficient precision and large linear errors. Different devices demand separate encoders supporting SPI / ABZ / UVW / PWM interfaces, leading to excessive material varieties and high debugging costs.
Today, Junmin Technology presents the KTH7112, a 16-bit high-speed and high-precision magnetic encoder. This single IC supports five mainstream output modes and integrates automatic non-linear calibration. It operates stably over a wide temperature range of -40°C to 125°C, delivering an all-in-one solution for angle detection pain points in motors and automation equipment.

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Motion control & closed-loop motor engineers — still struggling with these headaches?Optical encoders fear dust and oil with strict mounting tolerance requirements; ordinary magnetic encoders lack precision and have poor linearity. Separate encoders are needed for SPI/ABZ/UVW/PWM, resulting in messy BOM and heavy debugging workload.
Meet KTH7112 from Junmin Technology: 16-bit high-speed high-precision magnetic encoder. One chip covers 5 mainstream outputs, built-in automatic non-linear calibration, stable from -40°C to 125°C. It comprehensively addresses angle sensing challenges for motors and automation machinery.


01


Robust Performance, Redefining Precision Standards for Magnetic Encoders

  • Ultra-High Resolution & Industry-Leading Linearity16-bit absolute angle output covers the full 0°~360° range with 0~65535 codes, enabling accurate angle conversion without dead zones.Built-in ANLC Automatic Non-Linear Calibration. Calibrated INL error ＜ ±0.07°, with typical non-linearity of only ±0.1°.Output noise (1σ) as low as 0.015°, enabling stable detection of tiny angular fluctuations and jitter-free closed-loop control.
  • Ultra-Fast Response for High-RPM ApplicationsData update latency is merely 1 μs, ensuring zero lag under high-speed motion.Supports ultra-high rotational speed up to 120,000 rpm, ideal for servo systems, high-speed spindles and high-speed motors.High-speed communication up to 10 Mbps (SPI) and 5 Mbps (SSI) for seamless real-time large-data transmission.
  • Stable Operation Under Wide Operating ConditionsWide supply voltage range of 3.3 V ~ 5 V, compatible with mainstream power supplies for MCUs and industrial controls.Operating temperature: -40°C ~ 125°C, reliable for high/low-temperature workshops, automotive and outdoor equipment.Withstands magnetic fields of 30~150 mT; compatible with NdFeB and SmCo magnets. Normal operation is maintained with magnet air gap of 1~5 mm and offset ≤1 mm.



02


Multi-Functional Single Chip

Covers 5 types of output interfaces comprehensively, greatly simplifying BOM

No need to swap encoders for different device interfaces. A single KTH7112 supports switching among all mainstream output modes via MODE pins and register configuration:

  • 3-wire SPI (CPOL=1, CPHA=1)Reads 16-bit absolute angle with CRC8 checksum for anti-interference capability. Supports register read/write operations and non-volatile storage of MTP parameters. Users can freely configure zero position, rotation speed, filtering and other parameters.
  • SSI Synchronous Serial InterfaceIndustry-standard 2-wire SSI dedicated to angle acquisition. The host directly captures absolute position data, suitable for high-end servo systems.
  • ABZ Quadrature Incremental OutputProgrammable range of 4 ~ 16384 counts per revolution (max. 4096 pulses per revolution). Supports absolute power-on startup mode, eliminating homing upon power-up. The Z-phase width, phase position and output bandwidth are configurable, compatible with all incremental control systems

UVW Motor Commutation Output

Programmable for 1 ~ 32 pole pairs, perfectly matching commutation requirements of BLDC motors and stepper motors. The UVW signals feature 120° phase separation and align with Z-signal edges, enabling precise and jitter-free commutation.

Single-Wire PWM Absolute Output

12-bit resolution with adjustable frequency ranging from 120 Hz to 3.846 kHz.

It also indicates calibration status: flashing = calibration in progress, high level = calibration completed, low level = calibration failed, enabling visual debugging.


03


Exclusive ANLC Automatic Non-Linear Calibration, Eliminating Complicated Debugging


Most commercial magnetic encoders rely on manual compensation for magnetic field errors. Eccentricity and magnet inconsistency lead to precision drift. The KTH7112 adopts self-developed automatic calibration function:

  1. Two Calibration Trigger Modes

  • Hardware trigger: Pull up the AUTO_CAL pin for 2 seconds to achieve one-click zero setting or full-revolution calibration without software.

  • Software trigger: Start calibration by configuring REG_CAL via SPI registers.

  1. Calibration MechanismThe IC automatically samples error points at 16 equal intervals over one revolution, calculates compensation parameters in real time and stores them into MTP memory for permanent retention after power-off. The PWM signal indicates calibration status throughout the process, enabling easy debugging even for new operators.
  2. Optimal Calibration ConditionsConstant rotational speed of 100 ~ 1000 rpm with stable magnetic field. Linearity is greatly improved after calibration, effectively mitigating precision loss caused by magnet manufacturing tolerances and assembly deviations.


04


Rich Practical Functions to Meet Diverse Customization Requirements


  1. Flexible Zero-Point Configuration

  • Auto zeroing: One-click zero setting via pins or registers; parameters are automatically saved to MTP.

  • Manual zeroing: Fine offset adjustment via 16-bit ZERO register to accommodate mechanical assembly deviations; supports angle calculation for forward and reverse rotation directions.

  1. Anti-Interference Optimization

  • Multi-stage digital filtering: Adjustable via FW register (0x00~0xFF), up to 15-bit effective resolution to balance noise suppression and dynamic response.

  • Programmable angle hysteresis: Selectable range from 0 to 1.40625°, restraining minor noise jumps and enhancing equipment operational stability.

  1. Power-Loss Retention via On-Chip MTP Memory

    All configuration parameters (resolution, pole pairs, zero offset, calibration compensation values) can be programmed into the embedded MTP memory. Parameters load automatically upon power-up, eliminating repeated configuration after each startup


05


Compact Package for Easy Integration & Mass Production


  • Package: QFN-16L, miniature SMD package with 3 mm × 3 mm dimension. The sensing core is centered inside the package for simplified PCB routing.

  • Thermal pad: Bottom exposed T-PAD for direct ground connection, improving operational stability under high-temperature conditions.

  • Supplied in standard SMT tape-and-reel packaging. Compatible with standard reflow soldering profile (peak temperature: 255°C ±10°C), trouble-free for mass production.


06


Typical Applications


✅ Closed-loop control of BLDC motors

✅ Position feedback for closed-loop stepper motors and servo motors

✅ Absolute angle positioning for industrial automation

✅ Precision control of platform screen doors in rail transit

✅ Angle detection for robot joints and gimbals

✅ Position sensing for CNC equipment, textile and packaging machinery


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