KTH7112

Hall Magnetic Encoder IC, 16-bit, on-axis, ABZ/UVW/PWM/SPI/SSI, ANLC auto calibration

The KTH7112 is a high-speed, high-precision magnetic encoder equipped with an advanced automatic nonlinearity calibration (ANLC) engine. Users can initiate the calibration either by register configuration or via external pin trigger. The internal controller automatically measures nonlinear errors and calculates the compensation parameters. The calibration results are stored in internal MTP (Multi-Time Programmable) memory. This calibration mechanism requires no external computation and can significantly enhance the linearity of angle measurement, achieving absolute
accuracy better than ±0,1◦.

Capable of handling rotational speeds ranging from 0 to 120,000 rpm, the KTH7112 ensures rapid and precise angle output, making it a robust choice for applications requiring accurate angle measurement and speed control.

The KTH7112 provides multiple flexible angle output modes to meet diverse application needs. First, it supports a programmable ABZ quadrature pulse output with up to 16384 steps per revolution, delivering high-resolution position data. Additionally, the 4-wire SPI interface facilitates efficient angle reading and device communication. The KTH7112 also supports a 2-wire SSI output, simplifying system design and integration. In addition there is an PWM output for angle indication or calibration status and an UVW commutation signal for 1 to 32 pole-pair BLDC applications.

In summary, the KTH7112 is engineered to provide versatility, accuracy, and adaptability, making it a reliable solution for a wide range of angle measurement and control applications.

Features

16-bit resolution absolute angle output
Optimized for on-axis applications
High precision (< on-axis post-calibration INL error < ±0,1◦)
Supports both single-pole and multi-pole magnetic sources
Ultra-low latency (1 μs data updates)
SPI communication: angle reading, register read / write (10Mbps)
SSI communication: angle reading (5 Mbps)
Programmable incremental ABZ output: 4-16384 steps
PWM 12-bit angle output, frequency adjustable, supports calibration status indication
Programmable UVW output for 1 to 32 pole pairs
Built-in programmable memory (MTP)
Operating voltage: 3,3V to 5V
Operating temperature range: -40°C to 125°C
QFN-16L package: 3 × 3 mm

Technical Data

Part number	KTH7101	KTH7111	KTH7112	KTH7114	KTH7801
Absolute Resolution	16 bit	16 bit	16 bit	16 bit	16 bit
Stray Field Immunity	–	–	–	x	–
AEC-Q100 automotive qualified	x	–	–	–	x
On-axis topology	x	–	x	x	x
Off-axis topology	x	x	–	–	x
Multi-pole topology	x	x	x	x	x
ANLC automatic non-linear calibration	on- & off-axis	off-axis	on-axis	on-axis	–
INL error (after calibration)	±0,1◦ (on-axis) ±0,2◦ (off-axis)	±0,2◦	±0,1◦	±0,2◦	±0,35◦
Magnetic field strength diagnosis / alarm	–	–	–	–	x
Latency (data update)	1 μs	1 μs	1 μs	1 μs	1 μs
SPI (communication + angle)	10 Mbps	10 Mbps	10 Mbps	10 Mbps	x
CRC available	–	–	–	–	x
SSI (angle)	–	5 Mbps	5 Mbps	5 Mbps	x
ABZ incremental resolution	4 … 16384	4 … 16384	4 … 16384	4 … 16384	4 …4096
PWM (angle)	–	12 bit	12 bit	12 bit	14 bit
PWM (calibatrion status)	–	x	x	x	–
UVW commutation signal	–	1 .. 32 poles	1 .. 32 poles	1 .. 32 poles	–
MTP multi-time programmable memory	x	x	x	x	x
Operating voltage	3,3 … 5 V	3,3 … 5 V	3,3 … 5 V	3,3 … 5 V	3,3 … 5 V
Operating temperature	−40◦C to 125◦C	−40◦C to 125◦C	−40◦C to 125◦C	−40◦C to 125◦C	−40◦C to 125◦C
Package	SOP-8 5×6	QFN16 3×3	QFN16 3×3	QFN16 3×3	QFN16 3×3 SOP-8 5×6