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PDF AK7451 Data sheet ( Hoja de datos )
| Número de pieza | AK7451 | |
| Descripción | Zero Latency Angle Sensor IC | |
| Fabricantes | AKM | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AK7451 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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[AK7451]
AK7451
Zero Latency Angle Sensor IC
1. General Description
The AK7451 is a magnetic rotational angle sensor IC of Si monolithic with a built-in Hall element, and
easily achieve a non-contact rotation angle sensor in combination with diametrically magnetized two
pole magnet.
By detecting the magnetic field parallel vector to the IC package surface, the AK7451 outputs the
absolute angular position of the magnet, and the relative angular position.
By transverse magnetic field detection method using a magnetic flux concentrator, the AK7451 has
excellent axial misalignment immunity.
AK7451 is the Zero Latency rotation angle sensor to follow up to 20,000rpm with the architecture of the
tracking servo system, it is suitable to various motor drive applications and an encoder applications.
2. Features
□ Monolithic integrated 360 degrees angle sensor IC containing Hall element.
□ Easy to make a contactless rotation sensor with diametrically magnetized two pole magnet.
□ Interfaces : SPI(absolute angle), ABZ phase output (incremental Interface), UVW phase output
□ 12bit angle resolution
□ Less than ±0.6 deg. angle accuracy at 25 ºC
□ Maximum tracking speed : 333 rps (20,000 rpm)
□ Angle output delay time: 1.8µs
□ Operating ambient temperature: -40 to 125ºC
□ Various abnormal detection; abnormal magnetic flux density range etc.
□ Various setting functions; angle zero point, rotation direction, ABZ resolution/hysteresis etc.
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5. Pin Configurations and Functions
[AK7451]
Figure 2. Pin assignment of AK7451
Table 2. Pin configuration and functions of AK7451
No. Pin Name I/O Type
Description
1 A O Digital A-phase Pulse Signal
2 B O Digital B-phase Pulse Signal
3 Z O Digital Z-phase Pulse Signal
4 U O Digital U-phase Pulse Signal
5 V O Digital V-phase Pulse Signal
6 W O Digital W-phase Pulse Signal
7 ERROR O Digital ERROR output PIN
8 VDD - Power Power Supply PIN
9 VSS - GND Ground PIN
10 TESTA I/O Analog TEST dedicated PIN. This pin should be non-connection.
11 DMODE I Digital TEST dedicated PIN. This pin should be non-connection.
12 ATPGE I Digital TEST dedicated PIN. This pin should be non-connection.
13 MISO O Digital SPI output data signal
14 MOSI I Digital SPI Input Data Signal
15 SCLK
I Digital SPI Clock Signal
16 CS
I Digital SPI Chip Select Signal
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[AK7451]
12. Instructions
The AK7451’s function is described in this section. The function is roughly divided into programing
procedure (for various setup) and an angle measurement procedure. The operation procedure is as
follows.
<Programing Procedure>
1. The AK7451 will start as “Normal Mode” after power on automatically.
2. Transfer to “User Mode” and write configuration parameters in EEPROM and then verify the data.
3. Transfer to “Normal Mode” and then The AK7451 will output the angle data based on programed
parameter.
<Normal Operation (Angle measurement)>
1. Transfer to “Normal Mode”.
2. Input the “read angle command” as OPCODE”1001” via SPI, when the absolute angle data is
needed. If relative angle data is needed, count the ABZ output pulses. The ABZ pulses and UVW
pulses are outputted right after startup along with magnet rotating.
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK7451.PDF ] | |
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