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User Module Datasheet: Reference Multiplexer Datasheet RefMux V 1.3 (CY8C29/27/24/22xxx, CY8C23x33, CY8CLED02/04/08/16, CY8CLED0xD, CY8CLED0xG, CY8CTST120, CY8CTMG120, CY8CTMA120, CY8CTST300, CY8CTMA300, CY8C28x45, CY8CPLC20, CY8CLED16P01, CY8C28x43) | Cypress Semiconductor

User Module Datasheet: Reference Multiplexer Datasheet RefMux V 1.3 (CY8C29/27/24/22xxx, CY8C23x33, CY8CLED02/04/08/16, CY8CLED0xD, CY8CLED0xG, CY8CTST120, CY8CTMG120, CY8CTMA120, CY8CTST300, CY8CTMA300, CY8C28x45, CY8CPLC20, CY8CLED16P01, CY8C28x43)

Last Updated: 
Oct 23, 2012
Version: 
1.3

Features and Overview

  • Low voltage offset path from PMux to analog output bus
  • Provides a method to route internal references (AGND, REFHI, REFLO) to an external pin
  • Provides a 4 to 1 analog mux for switch capacitor blocks such as ADCs and filters, if used with the AMux4 User Module
  • Signals from PMux through test mux may be rail-to-rail
  • Provides a method to route external analog inputs directly to the analog output bus
     

The RefMux User Module switches one of three internal references (AGND, REFLO, or REFHI) to the analog output bus. Additionally, the output of the Continuous Time (CT) block PMux multiplexer can be selected. The RefMux User Module makes use of the TestMux in a CT block. These signals may be routed to a switch capacitor block on the bottom analog row or buffered and routed to an external pin. If used in conjunction with the AMux4 User Module, they form a four input analog multiplexer to route signals from one of four pins to the analog output bus.