High-Precision Absolute Angle Hall Sensor IC - KTH7823

1. SPI (Mode3, CPOL=1/CPHA=1) provides 4-wire high-speed communication, supporting register read/write and real-time acquisition of 16-bit absolute angle. A CRC-4 check option improves anti-interference performance for data transmission. WRDIS register configuration latching prevents accidental parameter modification.

2. The SSI synchronous serial interface enables minimal 2-wire wiring and is dedicated to angle reading, simplifying hardware design for compact equipment. It outputs 16-bit angle data with most significant bit first.

3. Programmable ABZ quadrature pulses reach up to 1024 pulses per revolution (4096 steps per revolution). Resolutions of 50/256/750/1000 lines are configurable. The width and phase of the Z-index zero signal can be adjusted via software. The output bandwidth is configurable in stages from 0.125 MHz to 16 MHz, suitable for both low-speed and high-speed motors.

4.The 14-bit PWM single-wire output operates at a fixed frequency of 910 Hz. The duty cycle linearly corresponds to angles ranging from 0° to 360°. With single-pin output, it enables extremely simplified wiring and is ideal for angle detection of compact actuators and valves.

Most commercial Hall encoders only allow on-axis installation, limiting mechanical design flexibility. KTH7823 inherently supports three magnet configurations. With X/Y-axis sensitivity calibration, it fits diverse mechanical structures:

• On-axis Radial Magnet: Standard for motor spindles, 1~5 mm air gap, up to 1 mm mounting tolerance

• Off-axis Tangential Magnet: For space-constrained side mounting. Integrated GAINtrim, Xtrim/Ytrim registers compensate nonlinear errors from asymmetric magnetic fields

• Multi-pole Magnet Ring: For multi-pole motors, 2~10 mm pole pitch, 0.5~3 mm air gap, layout optimization by magnetic simulation

1. QFN-16L (3×3 mm) Full-Function PackageAll signals including SPI, SSI, ABZ, PWM, MGH and MGL are fully brought out without any function reduction. It is suitable for high-end servos, elevators and automation equipment. The TEST pin must be grounded during operation.
2. SOP-8 (4.9×6 mm) Compact PackageOnly basic interfaces including SPI, PWM and power supply are retained. Featuring small size and lower cost, it is ideal for compact BLDC motors, intelligent valves and consumer rotary devices. The TEST pin shall be left floating.

✅ 工业自动化：伺服电机、BLDC 无刷电机、机械臂关节定位

✅ 楼宇设备：电梯主机、自动屏蔽门、闸机角度检测

✅ 精密执行机构：电动阀门、旋转工作台、云台定位

✅ 通用设备：风机、水泵、小型旋转执行器、精密旋钮

同系列精度梯度选型（按需选择）

KTH7821：0.24° 噪声，低成本基础款

KTH7822：0.059° 噪声，中端通用

KTH7823：0.015° 噪声，高精度主力款（本文主推）

KTH7824：0.004° 噪声，超高精度高端场景