Texas Instruments LDC5072-Q1 Manual

LDC5072-Q1 Inductive Position Sensor Front-End With Sin/Cos Interface
1 Features
• AEC-Q100 qualified with the following results:
– Device temperature grade 0: –40°C to +160°C
ambient operating temperature
• Integrated analog front-end IC for contact-less,
inductive position sensors for absolute rotary
position from 0° to 360°
• Removes the need for magnets, lowering system
cost
• Supports operation in harsh environments;
immune to stray magnetic fields, dirt, and
contamination
• High resolution and accuracy of ≤ 1 degree at
rotational speeds up to 480,000 RPM
• Differential signal paths with sine and cosine
outputs supporting a wide dynamic input range
• 5-V and 3.3-V input supply operating modes
• Integrated LC oscillator in the 2.4-MHz to 5-MHz
band to excite the inductive sensor coil
• Differential output drivers with high-voltage
protection and large capacitive load capability
• Automatic and manual gain control to maximize
dynamic range of output drivers
• Functional Safety-Compliant
– Developed for functional safety applications
– Documentation available to aid ISO 26262
system design
– Systematic capability up to ASIL C(D)
– Hardware capability up to ASIL C
• Extensive IC, sensor input, output, and supply pin
diagnostics
• Reverse voltage and overvoltage protection on
input supply and output pins from –15 V to 30 V
• Supports redundant mode for functional safety
LCIN
C1
LCOUT
C2
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
10K
LCIN
1
LCIN
2 LCOUT
LCOUT
Inductive
Sensor
3 TM0
R
INFLT
C
INFLT IN0P
4
R
INFLT
IN1P
5
C
INFLT
6 IN0N
R
INFLT
C
INFLT
7 IN1N
R
INFLT
C
INFLT
AGC_EN
8
VREG
R2 R1
LDC5072-Q1 Typical Application Diagram
SNOSD47C – DECEMBER 2018 – REVISED JULY 2023
2 Applications
• Rotary Position Sensors for:
– EV/HEV traction motor inverters
– Electric power steering
– Brake boost motors
– Integrated starter generators
• Small angular or arc-motion sensors for:
– Pedal position
– Valves and actuators
– Robots
3 Description
The LDC5072-Q1 IC is an analog front-end for
contact-less, inductive position sensors targeted for
absolute rotary position in automotive and industrial
applications. The LDC5072-Q1 excites a coil that is
typically printed on a printed circuit board (PCB). The
excitation is coupled back into two sets of receiver
coils on the same PCB using a conductive target
that is placed in close proximity of the PCB. The
conductive target can also be a pattern printed on
another PCB. The coil PCB stays stationary and the
target moves with the motor, actuator, or valve. The
excitation coil generates a secondary voltage on the
receiver coils depending on the position of the target
relative to the receiver coils. A signal representation
of the position is obtained by reading in the voltages
from the receiver coils, processing it, and giving
analog outputs representing the Sine and Cosine
components of the position of the target.
Device Information
PART NUMBER PACKAGE
LDC5072-Q1 TSSOP (16)
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
C8
VCC 16
GND
15
VREG
C7
VREG 14
L4
OUT0P 13
OUT0N L3
12
OUT1P L2
11
L1
OUT1N 10
C3 C4 C5 C6
TOUT 9
10K
LDC5072-Q1
(1)
BODY SIZE (NOM)
5.00 mm × 4.40 mm
From Input
Supply
R R
PU PU
R
PD
R
PD
GND
Control Board