The CC2541 Postage Stamp reference design contains the schematics and layout files for the CC2541PS Module. The reference design demonstrates good techniques for CC2541 decoupling and RF layout for a very compact 16.3mm x 13mm PCB . For optimum RF performance, the reference design should be copied accurately. This is a 2-layer PCB reference design using an integrated solution of a Johanson Chip balun(2450BM15A0002) and a Johanson chip antenna(2450AT42A100). The CC2541 Postage stamp is perfect for applications requiring proximity detecting and temperature sensing. It is ideal for proof of concept prototyping on existing systems.
This reference design shows the ability of the high-speed amplifier, LMH6554, to perform single-ended to differential conversion to drive high-speed analog-to-digital converters (ADCs) while maintaining excellent noise and distortion performance. Performance versus input frequency is shown for both AC and DC coupled applications while interfaced to the ADS4449 quad, 250-MSPS, 14-bit ADC. Various options for common-mode voltages, power supplies, and interfaces are discussed and measured to meet the requirements of a variety of applications. Anti-aliasing filter examples are shown along with the performance improvements that they provide.