ADS6244EVM

Series:	--
Part Status:	Obsolete
Number of A/D Converters:	2
Number of Bits:	14
Sampling Rate (Per Second):	105M
Data Interface:	Serial, Parallel
Input Range:	2 Vpp
Power (Typ) @ Conditions:	405mW @ 105MSPS
Utilized IC / Part:	ADS6244
Supplied Contents:	Board(s)

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ADS6244 Evaluation Board and Working Principle

The ADS6244EVM is an evaluation board for the Analog Devices ADS6244, a 12-bit digital-to-analog converter (DAC). This board enables quick evaluation and prototyping of the ADS6244. The board’s reference designs and application schematics are optimized for wide dynamic range data acquisition systems. The ADS6244 is a low-power, low-noise, wide-dynamic-range digital-to-analog converter (DAC). The serial peripheral interface (SPI) is used to select the range or resolution of the converter. The ADS6244EVM is easy to use, and designed to provide a complete system environment. It can be used to evaluate and prototype the ADS6244 DAC in various data acquisition (DAQ) applications. The ADS6244EVM evaluation board contains four main components: a digital control section with the ADS6244, an analog input signal conditioning section, an analog output interface, and a power supply and regulatory section. The digital section for the evaluation board is an ADS6244, a 12-bit DAC. The digital interface consists of a serial peripheral interface (SPI) and a four-channel digital output (DOUT). The purpose of the DOUT is to provide the SPI to the 4-wire SPI interface of the ADS6244. The 4-wire SPI port is used for communication between the evaluation board and a host computer. The SPI communication allows for selection of the ADC channel and the range or resolution of the converter.In the analog input signal conditioning section, the ADS6244EVM has an input buffer, a feedback capacitor, and a two-terminal gain-adjustment potentiometer for setting the analog input range voltage. The input buffer is designed to suppress spikes and overcoupled signals. The feedback capacitor is used to filter out unwanted noise that could degrade the performance of the DAC.The analog output section consists of a pair of differential output signals, each driven from the ADS6244, for higher resolution and linearity. The output buffer provides a low impedance drive to the load. The power supply and regulatory section contains a DC/DC power supply to generate +5V and ground to power the evaluation board. The automatic voltage-regulator (AVR) protects the evaluation board from under-voltage and over-voltage conditions.In summary, the ADS6244EVM evaluation board is designed to quickly evaluate and prototype the ADS6244 DAC, and it can be used in various data acquisition applications. It provides an input buffer, feedback capacitor, two-terminal gain-adjustment potentiometer, output buffer, and an AVR power supply. The control section consists of a 4-wire SPI interface that allows for selection of the ADC channel and range or resolution of the converter. The analog output consists of a pair of differential output signals.

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