MA700GQ-P Datasheet, PDF (5/15 Pages) MPS Industries, Inc. – Angular Sensor for Position Control with Side-Shaft Positioning Capability

MA700
Angular Sensor for Position Control with
Side-Shaft Positioning Capability
4. Pin Configuration
Figure 3: QFN-16 Top View
TABLE 8 PIN FUNCTIONS
No
Name Function
1
N/C
-
2
B
B (incremental output)
3
Z
Z (incremental output)
4
MOSI Data in (serial)
5
CS
Chip Select (serial)
6
A
A (incremental output)
7
MISO Data out (serial)
8
GND
Ground
9
N/C
-
10
N/C
-
11
N/C
-
12
SCLK Clock (serial)
13
VDD
3.3 V supply
14
N/C
-
15
N/C
-
16
VFLASH 3.6 V supply for OTP flashing
5. Sensor – Magnet Mounting
The sensitive volume of the MA 700 is confined in a
region less than 100 µm wide and consists of multiple
integrated Hall devices. This volume is located, with a
precision of 50 m in the center of the QFN package,
both horizontally and vertically. The sensor detects the
angle of the magnetic field projected in a plane parallel
to the package upper surface. It means that the only
magnetic field that matters is the in-plane component
(X and Y components) in the package middle point.
This detection mode gives flexibility for the design of
an angular encoder: all the sensor needs is that the
magnetic vector lies essentially within the sensor plane
and that its amplitude is comprised between 30 and 150
mT. Note that the MA 700 does work with smaller than
30 mT fields, but the linearity and resolution
performance may deviate from the specifications (table
2). The straightforward solution is to place the MA 700
sensor on the rotation axis of a permanent magnet for
instance a cylinder diametrically magnetized (see
Figure 4).
Figure 4: End-of-Shaft Mounting
Figure 5: Side-Shaft Mounting
Monolithic Power Systems, Inc. | Gland, Switzerland | Tel: [phone] | [e-mail] | www.sensimatech.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2014 Monolithic Power Systems. All Rights
Reserved. MA700 Rev 1.0 September 2014
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