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AK7451: Zero Latency Magnetic Rotary Angle Sensor for motor-driven applications is now on the market, enabling to replace optical encoder and resolver devices

2016-07-08 | Return

Product Name
AK7451
Product: Sensor ICs > Rotary Position Sensors > Angle Sensors

Title
Si monolithic rotary angle sensor IC with a Hall element

Applications
Motor control encoders, Rotor position detectors for DC brushless motor drive　　

Description

Asahi Kasei Microdevices Corporation (AKM) has launched a new zero latency magnetic rotary angle sensor, the AK7451, as an upgrading product of the AK7405.

The AK7451 is able to output up to eight-pole UVW phase that improves versatility, realizing rotor position detection in DC brushless motor-driven operation without Hall ICs installation. The expansion of ABZ phase output resolution setting from 4 to 16 types enhances motor control usability. These key features enable to use for more various types of industrial equipment motors than conventional products.

A magmatic rotary angle sensor detects rotation speed and rotation angles by measuring the intensity of a magnetic field with the combination of magnets.

Owing to a magnetic field detection method, the sensor is tolerant of dust and oil spots comparing with an optical detection method type encoders. The AK7451 is housed in a small 16-pin SOP package. It is able to design a compact motor drive unit with the AK7451.

● Easy installation of a contactless rotary sensor with diametrically magnetized mono-pole magnets
- The AK7451 is a Si monolithic IC that is magnetic rotary angle sensor with a Hall element. It has higher resistance of axial misalignment by transverse magnetic field detection method using both a diametrically magnetized two-pole magnet and magnetic flux concentrator.

● Supporting High-speed rotational operation
- The AK7451 is able to track up to 20,000rpm operation by tracking servo system architecture and achieves 1.8μs output delay time.

● Programmable ABZ/UVW phase output
- A zero degree point setting function at arbitrary rotational location, rotational direction, 16 types of ABZ output resolution setting and 8 types of UVW output pulse number setting can be programmed with EEPROM.
>> To obtain more information about AK7451, please visit here.

>> Please visit here.

Angle Sensors

Lineup

● Rotary angle sensor

Product name	Unit	AK7451 ABZ/UVM phase adjustable rotary angle sensor	AK7405 High speed rotary angle sensor	AK7401 12-bit rotary angle sensor
Automotive qualification	–	–	To be qualified	Yes
Operation magnetic range	mT	30 to 70	30 to 70	20 to 70
Angle resolution	bit	12	12	12
Angle accuracy@room temp.	Deg.	±0.6	±0.6	±0.65
Angle accuracy@overall operation temperature	Deg.	±1.5	±1.5	±1.28
Output noise (p-p)	Deg.	±0.16	±0.16	±0.6
Delay time	μs	1.8	1.8	110
Maximum tracking speed	rpm	20,000	20,000	100
ABZ resolution setting	ppr	1024,512,256,128, 1000,900,800,700, 600,500,400,360, 300,200,100,50	1024,512,246,128	–
UVM pulse number	ppr	1 to 8	–	–
SPI frequency	MHz	2	2	2
Output format	–	4-wire SPI ABZ / UVW	4-wire SPI ABZ	3-wire SPI PWM
Power consumption	mA	15.7	15.7	12
Power supply	V	4.5 to 5.5	4.5 to 5.5	4.0 to 5.5
Operation temperature	°C	-40 to 125	-40 to 150	-4.0 to 150
Package (Including lead wire)	mm	SOP 16-pin 9.9 x 6.0 x t1.75	SSOP 20-pin 5.0 x 6.4 x t1.35	SOP 8-pin 6.0 x 4.9 x t1.75
Sales Start	–	July 2016	Available	Available
Sample Distributors/ Representatives	–	–	–	Web Distributor

* Information on this page is current on the date of press release.

Source:http://www.akm.com/