iC-MR3
13-Bit S&H Sin/Cos Interpolator with 2.5V/5V Controller Interfaces
- Triggered 13-bit sine-to-digital conversion within 2 μs
- PGA inputs for differential and single-ended signals of up to 500 kHz
- Variable input resistance for current/voltage conversion
Description
iC-MR3 combines high-precision analog signal-conditioning with 1 Vpp line drivers for sin/cos signals and a fast, high-resolution sampling sine-to-digital converter. An absolute data interface (ADI) presets period counting, whereas multiturn and singleturn offset values adjust the final position data. The device aims at high-resolution position encoders and safety-oriented applications.
Types and Packages
- iC-MR3 QFN48-7×7, RoHS compliant MSL 3, 260°C
Features
- Triggered 13-bit sine-to-digital conversion within 2 μs
- PGA inputs for differential and single-ended signals of up to 500 kHz
- Variable input resistance for current/voltage conversion
- Signal conditioning for offset, amplitude, and phase
- Input signal stabilization through LED or MR bridge current control
- 8-bit parallel and serial I/O interfaces (BiSS, SSI, and SPI) with separate low-voltage supply
- Absolute data interface (BiSS/SSI) for initialization
- Position data of up to 50 bit with adjustable ST/MT data length
- Position data preset using ST/MT offset registers
- 12-bit A/D converter for temperature sensing
- Special functions for safety applications (signal monitoring, sign-of-life counter, and extended CRC)
- Current-limited, diff. 1 Vpp sin/cos outputs to 100 Ω
- Device configuration through I/O interfaces or I2C EEPROM
- Single-sided 5 V operation from -40 to +125 °C
Application
- Fast position decoding for safety-oriented encoder systems
- Motor feedback systems
