20th May 2008, 07:01 pm
In industrial applications, a digital-to-analog (D-to-A) interface may be rather straightforward but the analog-to-digital (A-to-D) converter (ADC) can be a challenge. The capacitive input stage of both delta-sigma and successive approximation register (SAR) interfaces used for the ADC requires signal capture within a limited time frame. An improper signal chain can cause ringing and oscillation and result in inaccurate readings. However, this is just one of many factors to consider when selecting an ADC.
Signal Chain
High-performance ADCs convert the output of an analog sensor to a digital format for a microcontroller or digital signal processor. The selection of the ADC must be part of a systems approach. “When somebody starts a design, you start with the sensor, you see what kind of output impedance it has and you choose an amplifier and resistors around the amplifier and you choose that configuration based on your sensor,” says Chuck Sins, applications engineer, National Semiconductor. “Based on the accuracy of your sensor and what you are ultimately trying to achieve, then I choose the resolution of the ADC.”
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8th February 2008, 02:59 pm
Power, performance and portability
Quickly capture, view, measure and store signals with the PicoScope 3224. This high precision, high resolution, PC oscilloscope and spectrum analyzer is quick and easy to use. The USB connection ensures a fast screen update rate, while making the scope simple to set up. The powerful PicoScope oscilloscope software lets you measure and evaluate complex signals with ease.
With the PicoScope 3224 you can replace many traditional test equipment tools with one lightweight, portable, and economical instrument — giving you a powerful, integrated test and measurement solution with all the functions of traditional equipment, at a fraction of the cost.
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4th February 2008, 05:22 pm
Product Name:
nRF24E2 Transmitter / MCU / ADCProduct Description:
Introducing the nRF24E2 transmitter with embedded 8051 MCU, 9 channel 12-bit ADC, and peripherals — the industry’s most complete wireless 2.4GHz ISM band platform
Continue reading ‘Nordic Semiconductor nRF24E2’ »
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