Understanding PSoC 1 Switched Capacitor Analog Blocks (AN2041)
This application note explains the theory, operation, and configuration of PSoC 1 switched capacitor analog blocks for building amplifiers, comparators, ADCs, and filters.
Overview
AN2041 provides a detailed technical overview of the switched capacitor (SC) analog blocks used in the PSoC 1 architecture. It covers fundamental concepts including charge movement, equivalent resistance, and active switched capacitor circuits. The document explains the internal structure of Type C and Type D blocks, demonstrating how these components are reconfigured to perform functions such as non-inverting amplification, integration, differentiation, and analog-to-digital conversion. It includes specific register control information, PSoC Designer software integration details, and an applications 'cook book' for implementing common analog circuits across the CY8C29x66, CY8C28xxx, CY8C27x43, and CY8C24xxx part families.
Use Cases
- Designing programmable analog front-ends using PSoC 1
- Implementing discrete-time filters and integrators
- Configuring internal PSoC 1 registers for custom analog functionality
- Understanding charge-based analog signal processing
- Developing low-resolution ADCs and comparators within PSoC hardware
Topics
Referenced Parts
| CY8C24x23A | Infineon | Associated Part Family: CY8C29x66, CY8C28xxx, CY8C27x43, CY8C24x23A,CY8C24x94 |
| CY8C24x94 | Infineon | Associated Part Family: CY8C29x66, CY8C28xxx, CY8C27x43, CY8C24x23A,CY8C24x94 |
| CY8C27x43 | Infineon | Associated Part Family: CY8C29x66, CY8C28xxx, CY8C27x43, CY8C24x23A,CY8C24x94 |
| CY8C28xxx | Infineon | Associated Part Family: CY8C29x66, CY8C28xxx, CY8C27x43, CY8C24x23A,CY8C24x94 |
| CY8C29x66 | Infineon | Associated Part Family: CY8C29x66, CY8C28xxx, CY8C27x43, CY8C24x23A,CY8C24x94 |