RDC chip GX2S1210 (AD2S1210 compatible) for vehicle motor angle control

Rotation Digitizers (RDCs) can be used to accurately measure angular position and can be deployed in industrial motor control, servos, robotics, powertrain units in hybrid all-electric vehicles, and many other applications that require the provision of precise shaft rotation, providing a highly accurate and stable control system for position and speed measurement in motor control applications for optimal overall performance.

Generally, we need to consider the phase lock range, angular accuracy, speed accuracy, tracking rate, build-up time and resolution of the rotary digitizer.ADI‘s RDC is often used in motor control systems, and this article recommends an automotive-grade, domestic RDC chip, GX2S1210, to replace the AD2S1210 for new energy vehicles.

GX2S1210 can convert the analog signal of the rotary output into a digital signal, and provide high-precision angle and speed information, which solves the traditional brushless motor rotor position determination is difficult, the rotational speed of the sampling rate is low, and other issues, and can simultaneously meet the modern servo motors, automotive motion detection, electric power steering, etc. on the demand for high conversion speed and high conversion accuracy.

The GX2S1210 is a high-resolution RDC chip with a resolution of up to 10 to 16 bits. By integrating an on-chip programmable sine wave oscillator, it can provide sine wave excitation for the resolver. The GX2S1210 has a maximum tracking rate of 3125 rps (10-bit resolution), 2.5 arcminute accuracy, parallel and serial 10-bit to 16-bit data ports, and is rated over the temperature range of -40°C to +125°C. The resolution and excitation frequency can be set, and the outputs can be selected from either a parallel port or an SPI interface for flexible design in a wide range of applications and systems.