The circuit shown in Figure 1 shows a dual channel simultaneous sampling, 12-bit data acquisition circuit for sin/cos position encoders. The design uses a 16-bit dual ADC with drop-in compatible 14- or 12-bit Resolution versions available, allowing for optimization of performance and cost. The design is tested for IEC61000-4-2, 4-4, and 4-5 (ESD, EFT, and Surge) as specified in the IEC61800-3 standard for EMC immunity requirements and specific test methods applicable in adjustable speed, electrical-power drive systems.
Figure 1: Dual Simultaneous Sampling Data Acquisition Block for Sin/Cos Encoder Applications
To see details on how to design the low power data acquisition front end circuit, click on the following link:
http://www.ti.com/tool/tida-00176
To order samples of the ADS8354 or other low power ADCs and voltage references designed for motor control applications, click on the following product links:
http://www.ti.com/product/ADS8354/samplebuy
http://www.ti.com/product/ADS8353/samplebuy
http://www.ti.com/product/ADS8350/samplebuy
