参考设计
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Universal Digital Interface to Absolute Position Encoders Reference Design
TIDA-00179: The TIDA-00179 reference design is an EMC compliant universal digital interface to connect to absolute position encoders, like EnDat 2.2, BiSS®, SSI or HIPERFACE DSL®. The design supports a wide input voltage range from 15-60V (24V nom). A connector with 3.3V logic I/O signals allows for direct interface to the host processor to run the master protocol. The design allows the host processor to select between a 4-wire encoder interface like EnDat 2.2 and BiSS or a 2-wire interface with power over RS485 like HIPERFACE DSL. To meet the selected encoder's supply range, the design offers a programmable output voltage with either 5.25V or 11V. This design’s power supply offers protection against over-voltage and short circuit according to the selected encoder’s voltage range to prevent damage during a cable short. TIDA-00179 has been tested up to 100m cable length with EnDat 2.2 and 2-wire HIPERFACE DSL encoders.
LCD Bias Power Reference Design with TPS61085
PMP9770: This reference design delivers a low cost LCD bias power circuit using the boost converter IC TPS61085. The solution provides all four voltages required by the thin film transistor (TFT) LCD display. The TPS61085 boost converter generates the AVDD voltage. Two external charge pump circuits provide the positive VGH and negative VGL bias voltage for the TFT. One external op-amp LM7321MF acts as a high current buffer; it provides the VCOM voltage for the TFT backplane.
