参考设计(15)
Altera Arria V GZ FPGA Discrete Power Solution Reference Design
PMP9357: The PMP9357 reference design is a complete power solution for Altera's Arria V series FPGAs. This design uses several TPS54620 synchronous step down converters, LDOs, and a DDR termination regulator to provide all the necessary rails to power the FPGA. To provide correct power sequencing, a UCD90120A power supply sequencer/monitor is used and can be controlled through I2C.
Microstepping Stepper Motor Control With MCU and Wi-Fi for IoT Reference Design
TIDM-TM4C123IOTSTEPPERMOTOR: A system example to show how to control a stepper motor via Wi-Fi connectivity. The TM4C123x MCU is integarated with the DRV8833 stepper motor driver to drive the stepper moter in full step, half step and microstep (up to 256) modes. The SimpleLinkTM Wi-Fi CC3100 network processor is also integrated into the system to demostatrate the capability of remotely controlling MCU/stepper motor operation via the Internet.
Optimizing LMH6554 to Drive High Speed ADCs
TIDA-00092: 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.
1-GHz Bandwidth Dual Channel Transmitter up to 4-GHz Reference Design
TIDA-00409: The TSW38J84 EVM reference design provides a platform to demonstrate a wideband dual transmit solution that incorporates an integrated LO. The reference design utilizes the 2.5 GSPS DAC38J84 device with the high performance modulators: TRF3722 (including integrated PLL/VCO) and TRF3705. The TRF3722 and TRF3705 can be combined to form a dual transmit solution with the TRF3722 generating the local oscillator (LO) for both modulators. The interface between the DAC38J84 and the modulators is discussed as well as measurements showing the combined performance of the DAC and modulators. The measurements illustrate the bandwidth performance, output third order intercept performance, harmonic distortion and sideband suppression performance.
FPGA Firmware Project for Measuring Bit Errors in the Output Word of an A to D Converter
TIDA-00070: For applications where there are bit errors and resulting sample errors (also called sparkle codes, word errors, or code errors), the ability to measure the Error rates caused by these bit errors is important. This FPGA firmware based application note proposes a method to accurately measure these errors over an indefinite time and provides an example of how this measurement can be done using a simple FPGA platform. Code is available on request for the two examples described in the application note.
Synchronizing Multiple JESD204B ADCs for Emitter Position Location Reference Design
TIDA-00467: A common technique to estimate the position of emitters uses the amplitude and phase shift data of a signal derived from an array of spatially distributed sensors. For such systems, it is important to guarantee a deterministic phase relationship between the sensors to minimize errors in the actual measured data. This application design will discuss how multiple Analog to Digital Converters (ADCs) with a JESD204B interface can be synchronized so that the sampled data from the ADCs are phase aligned.