kak111
Advanced Member level 4
iC-MH8
12 Bit Angular Hall Encoder with Sin/Cos Outputs
DESCRIPTION
The iC-MH8 12-bit angular encoder is a position sensor with integrated Hall sensors for scanning a permanent magnet.
The signal conditioning unit generates constant-amplitude sine and cosine voltages that can be used for angle calculation.
The resolution can be programmed up to a maximum of 4,096 angular increments per rotation.
The integrated serial interface also enables the position data to be read out to several networked sensors.
And the integrated memory can be written embedded in the data protocol.
The incremental interface with the pins A, B and Z supplies quadrature signals with an edge rate of up to 8 MHz.
Interpolation can be carried out with maximum resolution at a speed of 120,000 rpm.
The position of the index pulse Z is adjustable.
The commutation interface with the signals U, V and Wprovides 120° phase-shifted signals for block commutation
of eight pole EC motors.
The zero point of the commutation signals is freely definable in increments of 5.625° over 360°.
Sine and cosine signals are externally availabe to facilitate adjustement.
The RS422-compatible outputs of the incremental interface and the commutation interface are programmable
in the output current and the slew rate.
In conjunction with a rotating permanent magnet, the iC-MH8 module forms a one-chip encoder.
The entire configuration can be stored in the internal parameter ROM with zapping diodes.
The integrated programming algorithm assumes writing of the ROM structure.
SENSOR PRINCIPLE
In conjunction with a rotating permanent magnet, the iC-MH8 module can be used to create a complete encoder system.
A diametrically magnetized, cylindrical permanent magnet made of neodymium iron boron (NdFeB) or samarium cobalt
(SmCo) generates optimum sensor signals.
The diameter of the magnetshould be in the range of 3 to 6 mm.
The iC-MH8 has four Hall sensors adapted for angle determination and to convert the magnetic field into
a measurable Hall voltage.
Only the z-component of the magnetic field is evaluated, whereby the field lines pass through two opposing Hall
sensors in the opposite direction.
The arrangement of the Hall sensors is selected so that the mounting of the magnets relative to iC-MH8
is extremely tolerant.
Two Hall sensors combined provide a differential Hall signal. When the magnet is rotated around the longitudinal axis,
sine and cosine output voltages are produced which can be used to determine angles.
More information.........
**broken link removed**
12 Bit Angular Hall Encoder with Sin/Cos Outputs
DESCRIPTION
The iC-MH8 12-bit angular encoder is a position sensor with integrated Hall sensors for scanning a permanent magnet.
The signal conditioning unit generates constant-amplitude sine and cosine voltages that can be used for angle calculation.
The resolution can be programmed up to a maximum of 4,096 angular increments per rotation.
The integrated serial interface also enables the position data to be read out to several networked sensors.
And the integrated memory can be written embedded in the data protocol.
The incremental interface with the pins A, B and Z supplies quadrature signals with an edge rate of up to 8 MHz.
Interpolation can be carried out with maximum resolution at a speed of 120,000 rpm.
The position of the index pulse Z is adjustable.
The commutation interface with the signals U, V and Wprovides 120° phase-shifted signals for block commutation
of eight pole EC motors.
The zero point of the commutation signals is freely definable in increments of 5.625° over 360°.
Sine and cosine signals are externally availabe to facilitate adjustement.
The RS422-compatible outputs of the incremental interface and the commutation interface are programmable
in the output current and the slew rate.
In conjunction with a rotating permanent magnet, the iC-MH8 module forms a one-chip encoder.
The entire configuration can be stored in the internal parameter ROM with zapping diodes.
The integrated programming algorithm assumes writing of the ROM structure.
SENSOR PRINCIPLE
In conjunction with a rotating permanent magnet, the iC-MH8 module can be used to create a complete encoder system.
A diametrically magnetized, cylindrical permanent magnet made of neodymium iron boron (NdFeB) or samarium cobalt
(SmCo) generates optimum sensor signals.
The diameter of the magnetshould be in the range of 3 to 6 mm.
The iC-MH8 has four Hall sensors adapted for angle determination and to convert the magnetic field into
a measurable Hall voltage.
Only the z-component of the magnetic field is evaluated, whereby the field lines pass through two opposing Hall
sensors in the opposite direction.
The arrangement of the Hall sensors is selected so that the mounting of the magnets relative to iC-MH8
is extremely tolerant.
Two Hall sensors combined provide a differential Hall signal. When the magnet is rotated around the longitudinal axis,
sine and cosine output voltages are produced which can be used to determine angles.
More information.........
**broken link removed**
