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NSE-5310
Miniature Position Encoder with Zero
Reference and I2C Output
1 General Description
The TRACKER NSE-5310 is an incremental position sensor with on-
chip encoding for direct digital output. A Hall element array on the
chip is used to derive the incremental position of an external
magnetic strip placed above the IC at a distance of 0.3 mm (typ).
This sensor array detects the ends of the magnetic strip to provide a
zero reference point.
The integration of Hall-effect position sensors, analog front end and
digital signal processing on a single IC chip provides an ingeniously
small position sensor, without the need for external pulse counters.
Direct digital output is accessible over the serial interface using I2C
protocol.
The TRACKER NSE-5310 provides absolute position information
over the length of a magnet pole pair (2 mm). A user can count pole
pairs and achieve absolute position information over the entire length
of the magnet (essentially unlimited).
With better than 0.5 micron resolution, the TRACKER is a robust,
cost-effective alternative to miniature optical encoders. It can be
used as a linear or off-axis rotary encoder.
2 Key Features
?? Direct digital output using I2C protocol
?? End-of-magnet detection for built-in zero reference
?? 0.488 μ m resolution
?? < 2 μ m bi-directional repeatability
?? < ±10 μm absolute error
?? On-chip temperature sensor
?? Magnetic field strength monitor
?? Available in TSSOP-20
?? Custom packaging such as wafer-level chip scale packaging
can be provided. Minimum order quantities may apply.
?? RoHS compliant
3 Applications
The NSE-5310 is ideal for Micro-actuator and servo drive feedback,
Replacement for optical encoders, Optical and imaging systems,
Consumer electronics, Precision biomedical devices,
Instrumentation and automation, Automotive applications, and
Integrated closed-loop motion systems using New Scale’s
SQUIGGLE micro motor.
Figure 1. TRACKER NSE-5310 Block Diagram
VDD3V3
MagINCn
VDD5V
LDO 3.3V
Linear Hall
Array
&
Frontend
Amplifier
Sin
Cos
AGC
DSP
AGC
Temperature sensor
Pos
Mag
AGC
PWM
Interface
Absolute
Interface
(I 2 C)
MagDECn
PWM
SDA
SCL
AO
CSn
OTP
Register
NSE-5310
Programming
Parameters
Incremental
Interface
Prog
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