ZMID5201/02/03
Inductive Position Sensor IC Datasheet
Description Features
The ZMID5201, ZMID5202, and ZMID5203 family of inductive Position sensing based on inductive principle
position sensor ICs are used for absolute rotary or linear motion
Cost effective; no magnet required
sensing in automotive, industrial, medical, and consumer appli-
Immune to magnetic stray fields; no shielding required
cations. The ZMID520x uses the physical principles of induction in
Suitable for harsh environments and extreme temperatures
a wire loop and eddy currents to detect the position of an electrically
conducting target that is sliding or rotating above a set of coils, Only three wires (ground, supply, output)
consisting of one transmitter coil and two receiver coils.
Nonvolatile user memory; programming through output pin
The three coils are typically printed as copper traces on a printed Single IC supports on-axis and off-axis rotation, linear motion,
circuit board (PCB). They are arranged such that the transmitter and arc motion sensing
coil induces a secondary voltage in the receiver coils that depends
High resolution, even for small angle ranges
on the position of the metallic target above the coils.
High accuracy: 0.2% full scale
A signal representative of the targets position over the coils is
9-point user linearization
obtained by demodulating and processing the secondary voltages
Rotation sensing up to a full turn of 360
from the receiver coils. The target can be any kind of metal, such
Overvoltage and reverse-polarity protection:
as aluminum, steel or a PCB with a printed copper layer.
-14V to +18V maximum, depending on product
The ZMID5201/02/03 ICs are fully qualified according to the
ESD and short-circuit protection
automotive standard AEC-Q100 grade 0 (-40C to 150C ambient
Power or ground loss detection
temperature).
Facilitates redundant design requirements
Three versions with different output interfaces are available:
Programmable non-linearity correction
ZMID5201: Analog output
Adaptive gain control supporting a wide range of coil designs
ZMID5202: PWM digital output
and target displacement
ZMID5203: SENT digital output
The ZMID5201/02/03 products are safety-related,
intermediate hardware parts supporting ISO26262-compliant
systems in regard to random failures
Available Support
IDT provides Application Modules that demonstrate ZMID520x
position sensing, including rotary, arc, and linear applications.
Application Circuit
Physical Characteristics
Wide operation temperature: -40 C to +150C
10 7
VDDT VDDE
Supply voltage: 4.5V to 5.5V
C
VT
+5V
CVE
Small 14-TSSOP package
9
4
EP
SOUT
Tx C
T
OUT
8
EN
Typical Applications
6
VSSE
Rotary position sensors up to 360; e.g. steering angle
14
GND
R1P
sensors, potentiometer replacement
5
Rx
VDDA
Small-angle sensors or arc-motion sensors; e.g. pedal, (cos)
13
C
VA
R1N
vehicle level, or valve sensors
3
VDDD
12
CVD
Linear motion sensors; e.g. linear-actuator position sensors,
R2P
2
Rx
fluid-level sensors
TEST_ENA
(sin)
11
1
R2N
TEST_D
2018 Integrated Device Technology, Inc. 1 October 5, 2018
ZMID5201/-02/-03ZMID5201/02/03 Datasheet
Contents
1. Pin Assignments ...........................................................................................................................................................................................4
2. Pin Descriptions ............................................................................................................................................................................................4
3. Absolute Maximum Ratings ..........................................................................................................................................................................5
4. Operating Conditions ....................................................................................................................................................................................6
5. Electrical Characteristics ..............................................................................................................................................................................7
6. Circuit Description ........................................................................................................................................................................................9
6.1 Overview ..............................................................................................................................................................................................9
6.2 Block Diagram ...................................................................................................................................................................................10
7. Redundant Connection ...............................................................................................................................................................................11
8. Protection and Diagnostics .........................................................................................................................................................................12
8.1 I/O Protection .....................................................................................................................................................................................12
8.2 Diagnostics ........................................................................................................................................................................................12
8.3 Functional Safety ...............................................................................................................................................................................12
9. ZMID5201 Inductive Sensor with Analog Output ........................................................................................................................................13
10. ZMID5202 Inductive Sensor with PWM Output ..........................................................................................................................................16
11. ZMID5203 Inductive Sensor with SENT Output .........................................................................................................................................19
11.1 SENT Protocol ...................................................................................................................................................................................20
12. Programming Options .................................................................................................................................................................................23
13. Operation at High Rotation Speeds ............................................................................................................................................................24
14. Interpolation, Linearity Error Correction ......................................................................................................................................................25
15. Application Examples .................................................................................................................................................................................26
16. Package Outline Drawings .........................................................................................................................................................................28
17. Marking Diagram ........................................................................................................................................................................................28
18. Ordering Information ...................................................................................................................................................................................29
19. Revision History ..........................................................................................................................................................................................30
List of Figures
Figure 1. Pin Assignments for 14-TSSOP Package Top View ........................................................................................................................4
Figure 2. Parallel Resonator Circuit ....................................................................................................................................................................8
Figure 3. Coil Design for a Linear Motion Sensor ...............................................................................................................................................9
Figure 4. Block Diagram ...................................................................................................................................................................................10
Figure 5. Application Diagram, Dual Redundant Sensor with Shared Transmit Coil ........................................................................................11
Figure 6. External Components for ZMID5201 Analog Interface with Pull-Down Resistor ...............................................................................13
Figure 7. External Components for ZMID5201 Analog Interface with Pull-up Resistor ....................................................................................13
Figure 8. Example of ZMID5201 Analog Output Transfer Function and Programming Options .......................................................................15
Figure 9. External Components for ZMID5202 PWM Interface with Pull-Up Resistor ......................................................................................16
Figure 10. PWM Signal Range ...........................................................................................................................................................................17
2018 Integrated Device Technology, Inc. 2 October 5, 2018