This TI Verified Design provides the theory, component selection, TINA-TI simulations, Verification & Measurement Performance, Altium Schematics, PCB Layout for a Phase Compensated 8-Ch Multiplexed Data Acquisition System for Power Automation. The design uses a 16-bit, 8-Channel, 500ksps SAR ADC, ADS8688 with integrated analog front-end circuit for ease of system hardware design.
The design introduces the concept of phase and phase Compensation, compares the additional phase delay introduced between the input channels of a non-simultaneous sampling ADC with a simultaneous sampling ADC, and provides a optimal algorithm to compensate for the phase delay introduced in a non-simultaneous implementation.
Measured results demonstrate how the phase compensation algorithm used in this design compensates for the additional phase delay introduced by a multiplexed ADC, resulting in an equivalent performing solution as compared to a simultaneous sampling ADC solution.
- Verified Design Contains Theory, Component Selection, TINA-TI Simulation, Verification & Measured Performance, Altium Schematics and PCB Layout
- ADS8688: 16-Bit, 500-kSPS, 8-Channel, Single-Supply, SAR ADC with Multiplexed and Bipolar Input
- Single-ended sinusoidal input with amplitude of = ±10V and typical = 50 Hz
- 0.002036 degree compensated phase difference