AS5304A-ATSU Datasheet, PDF (1/13 Pages) List of Unclassifed Manufacturers – Integrated Hall ICs for Linear and Off-Axis Rotary Motion Detection

AS5304/AS5306 Integrated Hall IC for linear and off-axis rotary motion detection
AS5304 / AS5306
Integrated Hall ICs for
Linear and Off-Axis Rotary Motion Detection
PRELIMINARY DATA SHEET
1 General Description
The AS5304/AS5306 are single-chip IC’s with integrated
Hall elements for measuring linear or rotary motion using
multi-pole magnetic strips or rings.
This allows the usage of the AS5304/AS5306 in
applications where the Sensor IC cannot be mounted at the
end of a rotating device (e.g. at hollow shafts). Instead, the
AS5304/AS5306 are mounted off-axis underneath a multi-
pole magnetized ring or strip and provides a quadrature
incremental output with 40 pulses per pole period at
speeds of up to 20 meters/sec (AS5304) or 12 meters/sec
(AS5306).
An single index pulse is generated once for every pole pair
at the Index output.
Using, for example, a 32pole-pair magnetic ring, the
AS5304/AS5306 can provide a resolution of 1280
pulses/rev, which is equivalent to 5120 positions/rev or
12.3bit. The maximum speed at this configuration is 9375
rpm.
The pole pair length is 4mm (2mm north pole / 2mm south
pole) for the AS5304, and 2.4mm (1.2mm north pole /
1.2mm south pole) for the AS5306. The chip accepts a
magnetic field strength down to 5mT (peak).
Both chips are available with push-pull outputs
(AS530xA) or with open drain outputs (AS530xB).
The AS5304/AS5306 are available in a small 20-pin
TSSOP package and specified for an operating ambient
temperature of -40° to +125°C.
2 Benefits
• Complete system-on-chip
• High reliability due to non-contact sensing
• Suitable for the use in harsh environments
• Robust against external magnetic stray fields
3 Key Features
• High speed, up to 20m/s (AS5304)
12m/s (AS5306)
• Magnetic pole pair length: 4mm (AS5304) or
2.4mm (AS5306)
• Resolution: 25µm (AS5304) or 15µm (AS5306)
• 40 pulses / 160 positions per magnetic period.
• 1 index pulse per pole pair
• Linear movement measurement using multi-pole
magnetic strips
• Circular off-axis movement measurement using multi-
pole magnetic rings
• 4.5 to 5.5V operating voltage
• Magnetic field strength indicator, magnetic field alarm
for end-of-strip or missing magnet
4 Applications
The AS5304/AS5306 is ideal for high speed linear motion
and off-axis rotation measurement in applications such as
• electrical motors
• X-Y-stages
• rotation knobs
• industrial drives
Figure 1: AS5304 (AS5306) with multi-pole ring magnet.
Figure 2: AS5306 (AS5304) with magnetic multi-pole strip magnet
for linear motion measurement
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