High speed analog-to-digital converter
The analog-to-digital converter (ADC) board is a 16-channel, 16-bit high-speed converter that accepts analog input voltages in the range of ±2.5V. Through careful design and using the latest true-differential, charge-distribution, successive-approximation converters, the ADC achieves unprecedented performance and low-power consumption. Each unit is tested to confirm its 20 ppm linearity and sampling standard-deviation of less than 0.5 samples rms.
The ADC board is designed to work with the other analog and digital boards. Analog input voltages are applied via a 20-pin ribbon cable connector (the Analog Bus) and digital signals are transferred in and out via a 26-pin ribbon connector (the Instrument Bus). Analog signals can also be input via a 32-pin header for signals that are not on the Analog Bus.
A programmable logic chip continually monitors requests for data conversion on the Instrument Bus, selects the requested channel, controls the conversion process and presents the digital result to the Instrument Bus. The base address of the ADC board is set with 4 jumpers and can be set to any value between 0 and 240 in steps of 16. Up to 16 ADC converters can be operated simultaneously for a total of 256 channels.
Download the Product Data Sheet (PDF).
