Renesas Electronics Corporation IPS2550DE1R Inductive Position Sensors

The Renesas IPS2550DE1R redefines performance and cost efficiency for brushless motor control, safety-critical automotive systems, and precision industrial automation. By combining immunity to stray fields, extreme temperature operation, and resolver-beating accuracy, it answers the market's demand for smaller, cheaper, and more reliable alternatives to legacy sensors.

The Renesas IPS2550DE1R represents a breakthrough in contactless inductive position sensing, delivering absolute rotor position data via sine/cosine outputs for ultra-high-speed motor commutation up to 600,000 electrical RPM. Designed as a core component of Resolver 4.0, this innovative IC eliminates the need for magnets and optical encoders while providing superior stray-field immunity, extreme temperature resilience, and BOM cost reduction. Perfect for functional safety-critical automotive systems (EPS, E-motors, transmission), industrial servo motors, and robotics, the IPS2550DE1R leverages eddy current principles to track the position of a simple metallic target over a custom coil array (1 Tx + 2 Rx). Its user-configurable single-ended or differential outputs adapt to noise environments, while programmable gain control ensures consistent accuracy ±0.1% FS.

Key Advantages Over Traditional Sensors

• No Magnets Needed – Uses low-cost metallic targets (vs. fragile magnets in Hall-effect sensors)
• Inherent Stray-Field Immunity – Operates reliably near high-power motors without shielding
• Resolver 4.0 Technology – 50% smaller/lighter vs. resolvers, 70% lower BOM cost
• Extreme Environment Rated – -40°C to +160°C operation (AEC-Q100 qualified)
• Configurable Outputs – Single-ended (cost-optimized) or differential (noise-resistant)
• Supports Multiple Motion Types – On-axis/off-axis rotation, linear/arc movement via coil design
• Built-In Diagnostics & Protection – Reverse polarity (±18V), over-voltage, and ESD hardened

Features & Specifications

1. High-Precision Inductive Sensing Technology

• Eddy-current-based detection of metallic targets (iron, aluminum, etc.)
• Sine/cosine analog outputs (differential or single-ended) for absolute position
• 0.1% FS accuracy (with ideal coil design), ±1° electrical error
• Automatic Gain Control (AGC) with programmable limits

2. Flexible Programmability & Interfaces

• Non-volatile memory for user settings (stored calibration, output mode)
• I2C/SPI digital interface for real-time configuration & diagnostics
• Analog/digital programmability for dynamic adjustment

3. Robust Automotive-Grade Design

• Dual supply ranges: 3.0 – 3.6V or 4.5 – 5.5V
• ±18V fault protection on supply/output pins (ISO 7637-2 compliant)
• 16-pin TSSOP package (MSL1, Pb-free) for compact PCB layouts

4. Multi-Motion Support

• Full 360° rotational sensing (on-axis or off-axis)
• Linear/arc motion tracking via custom coil optimization

Applications

Automotive (ASIL-D Capable)

• Electric Power Steering (EPS) motor commutation
• E-Axle & Transmission position feedback
• Throttle/Brake Pedal sensing
• Brushed/Brushless DC Motor Control

Industrial & Robotics

• Servo motor encoders (replace optical/Resolver)
• Robotic joint actuators
• CNC machine tool spindles
• Elevator door positioning

Energy & Aerospace

• Wind turbine pitch control
• Flight control surface actuators

Comparative Benefits vs. Competing Technologies

IPS2550DE1R comparison with alternative parts

Parameter	IPS2550DE1R	Optical Encoder	Hall-Effect Sensor	Traditional Resolver
Position Type	Absolute (SIN/COS)	Incremental/Absolute	Absolute	Absolute
Stray-Field Immunity	✅ Excellent	❌ Poor (EMI sensitive)	❌ Moderate (needs shielding)	✅ Good
Temperature Range	-40°C to +160°C	-20°C to +85°C	-40°C to +150°C	-40°C to +150°C
Mechanical Durability	✅ No moving parts	❌ Glass disk fragile	✅ Robust	❌ Bulky winding
System Cost	✅ Lowest (no magnet)	❌ High	✅ Low	❌ Highest