Bus Pirate “Ultra”: using ADS7042 12bit Analog to Digital Converter from the FPGA

Beginning with Bus Pirate “Ultra” prototype v1d, all analog measurements are handled by the FPGA using an external serial Analog to Digital Converter chip. This lets us pipeline ADC measurements into the command queue so that bus interactions can be done with very precise timing. We’ll be using Texas Instruments’ series of tiny ADCs with […]

App note: Digitally controlled DC/DC converter

A digitally controlled DC to DC converter: You can easily add margining capability (digital adjustment of the output voltage) to a DC/DC converter by adding a 2- or 4-channel, I²C-adjustable current DAC (DS4402 or DS4404) at the converter’s feedback input. Because each DAC output is 0mA at power up, the extra circuitry is transparent to […]

Flash ADCs, USB battery chargers

rsdio tipped us to some interesting parts and application notes. First up is a tutorial on fast parallel analog to digital converters: Flash analog-to-digital converters, also known as parallel ADCs, are the fastest way to convert an analog signal to a digital signal. Flash ADCs are ideal for applications requiring very large bandwidth, but they […]