Product Overview
The Magntek MT6825 is a next-generation high-resolution, high-speed magnetic angle encoder IC based on advanced Anisotropic Magnetoresistance (AMR) technology. It offers 0-360 absolute angle position detection with 18-bit resolution and supports rotational speeds up to 25,000 RPM. The IC features low system latency ( 2 s) and operates reliably within a -40 to 125 temperature range. It provides versatile output options including incremental ABZ, incremental UVW, absolute PWM, and SPI bus output. The MT6825 is designed to be insensitive to magnet processing and mechanical installation errors, making it an ideal replacement for traditional optical encoders in applications such as DC brushless motor control, servo motor control, and closed-loop stepper motor control.
Product Attributes
- Brand: Magntek
- Technology: Anisotropic Magnetoresistance (AMR)
- Packaging: TSSOP-16
- Certifications: RoHS compliant
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Performance | Absolute Angle Detection | 0-360 |
| Resolution | 18-bit absolute angle data | |
| Max Rotational Speed | 25,000 RPM | |
| System Latency | 2 s | |
| Operating Temperature | -40 to 125 | |
| Sensitivity to Errors | Insensitive to magnet processing and mechanical installation errors | |
| Output Modes | Incremental | ABZ (1-4096 pulses/rev programmable), UVW (1-16 pole pairs programmable) |
| Absolute | PWM (12-bit resolution) | |
| Serial Interface | SPI bus (3-wire or 4-wire) | |
| Error Output | High level when magnetic field is too weak or speed exceeds limit | |
| Electrical Characteristics | Supply Voltage (VDD) | 3.0V to 5.5V |
| Supply Voltage (HVPP for MTP programming) | 7.0V to 7.2V | |
| Chip Operating Current | Typical: 5 mA, Max: 15 mA | |
| ABZ Output | Resolution | Programmable: 1 to 4,096 pulses/revolution |
| Max Frequency | 1.024 MHz | |
| UVW Output | Pole Pairs | Programmable: 1 to 16 pole pairs/revolution |
| Phase Shift | 120 | |
| PWM Output | Resolution | 12-bit absolute angle data |
| Frequency | 971.1 Hz or 485.6 Hz (selectable) | |
| Data Representation | Linear relationship between high-level pulse count and angle | |
| SPI Interface | Mode | 4-wire or 3-wire (selectable) |
| Data Transfer | Mode 3 (CPOL=1, CPHA=1) | |
| Magnetic Field | Recommended Magnet Diameter | 10mm (1 pole pair, radially magnetized) |
| Recommended Magnet Thickness | 2.5mm | |
| Input Magnetic Field Strength | 30 to 1,000 mT (parallel to chip surface) | |
| Installation | Air Gap (AG) | Recommended: Up to 3.0 mm |
| Eccentricity (DISP) | Recommended: Up to 0.3 mm | |
| Models | MT6825GT-STD | 4-wire SPI; AB=1 pulse/rev, Z=1 LSB; UVW=1 pole pair/rev; PWM=971 Hz; CCW angle increase |
| MT6825GT-PP1 | AB=1,200 pulses/rev, Z=1 LSB; UVW=-A-B-Z; PWM=971 Hz; CCW angle increase | |
| MT6825GT-LL1 | AB=2,000 pulses/rev, Z=1 LSB; UVW=-A-B-Z; PWM=971 Hz; CCW angle increase | |
| MT6825GT-LLD | AB=2,000 pulses/rev, Z=4 LSB; UVW=-A-B-Z; PWM=971 Hz; CCW angle increase | |
| MT6825GT-M4D | AB=2,500 pulses/rev, Z=4 LSB; UVW=4 pole pairs/rev; PWM=971 Hz; CCW angle increase | |
| MT6825GT-M4V | AB=2,500 pulses/rev, Z=4 LSB; UVW=4 pole pairs/rev; PWM=971 Hz; CW angle increase | |
| MT6825GT-M5D | AB=2,500 pulses/rev, Z=1 LSB; UVW=5 pole pairs/rev; PWM=971 Hz; CCW angle increase | |
| MT6825GT-M5V | AB=2,500 pulses/rev, Z=4 LSB; UVW=5 pole pairs/rev; PWM=971 Hz; CW angle increase | |
| MT6825GT-MMD | AB=2,500 pulses/rev, Z=4 LSB; UVW=-A-B-Z; PWM=971 Hz; CCW angle increase | |
| MT6825GT-QQ1 | AB=3,600 pulses/rev, Z=1 LSB; UVW=-A-B-Z; PWM=971 Hz; CCW angle increase | |
| MT6825GT-EED | AB=4,096 pulses/rev, Z=4 LSB; UVW=-A-B-Z; PWM=971 Hz; CCW angle increase | |
| MT6825GT-M4F | AB=2,500 pulses/rev, Z=4 LSB; UVW=4 pole pairs/rev; PWM=971 Hz; CCW angle increase (Larger bandwidth, faster response) | |
| MT6825GT-M5VF | AB=2,500 pulses/rev, Z=4 LSB; UVW=5 pole pairs/rev; PWM=971 Hz; CW angle increase (Larger bandwidth, faster response) | |
| MT6825 All Models | TSSOP-16 package (MSL-3), Tube (60 pcs/tube) or Tape & Reel (3000 pcs/reel) |
Applications
- Absolute angle position sensor
- DC brushless motor control
- Servo motor control
- Closed-loop stepper motor control
- Replacement for certain optical encoder applications
2303301000_Magn-Tek-MT6825GT-STD_C5144620.pdf
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