Absolute rotary encoder | Magnetic | MA3

  • Miniature size (0.48 in. diameter)
  • Non-contacting magnetic single chip sensing technology
  • -40C to 125C operating temperature range
  • 10-bit Analog output - 2.6 kHz sampling rate
  • 10-bit PWM output - 1,024 positions per revolution, 1 kHz
  • 12-bit PWM output - 4,096 positions per revolution, 250 Hz
Manufacturer:US Digital


The MA3 is a miniature rotary absolute shaft encoder that reports the shaft position over 360° with no stops or gaps. The MA3 is available with an analog or a pulse width modulated (PWM) digital output.

Analog output provides an analog voltage that is proportional to the absolute shaft position. Analog output is only available in 10-bit resolution.

PWM output provides a pulse duty cycle that is proportional to the absolute shaft position. PWM output is available in 10-bit and 12-bit resolutions. While the accuracy is the same for both encoders, the 12-bit version provides higher resolution.

Three shaft torque versions are available: high torque (-D option), low torque (-N) and ball-bearing (-B). The high and low torque versions have a stainless steel shaft and brass bushing lubricated with grease to provide ideal torque for panel mount, human-interface applications. The ball-bearing version has a brass shaft and miniature precision ball bearings suitable for high speed and ultra low torque applications. The ball-bearing version is only available with a 1/8" shaft diameter.

Connecting to the MA3 is simple. The 3-pin high retention snap-in 1.25mm pitch polarized connector provides for +5V, output, and ground.

Attribute NameAttribute Value
Documentation from Manufacturer
Output Signal Type
Measuring Principle
Resolution Singleturn (bit)
Resolution Multiturn (bit)
5%, 10%
Analog, PWM
Housing Diameter (mm)
Shaft Type
Not Specified
Shaft Diameter (mm)
1/8", 6, 1/4''
Revolutions - max. (rpm)
100, 15000
Protection Rating Housing
Not specified
Connector, Cable



Sweden, Solna, Signalistgatan 14, 16972.

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