The MCP3561R-E/ST from Microchip Technology is a 24-bit analog-to-digital converter (ADC) Integrated Circuit with 1 input and sigma-delta architecture, in a 20-TSSOP package.
The MCP3561T-E/NC from Microchip Technology is a 24-bit analog-to-digital converter with 1 input and a sigma-delta architecture, in a 20-UQFN (3x3) package.