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Volume 9, Issue 2 | YOUR SEMICONDUCTOR SOLUTIONS RESOURCE |
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C o n t e n t s 16-Bit ADCs Deliver Ease of Use >> Benefits of Continuous Time Σ-Δ ADCs >> 24-Bit Σ-Δ ADC for Faster Precision Measurement >> High Speed ADCs Use 50% Less PCB Surface >> Receivers Optimize Image Quality and Power >> Pin-Programmable, Low Power Σ-Δ ADC Is Easy to Implement >> ADC Simulation, Software, and Behavioral Tools >> New Family of PulSAR ADCs Delivers High Resolution >> Dual Channel, SAR ADCs with Highest Performance at Lowest Power >> Top Considerations for Avoiding Differential ADC Driver Accidents >> ADC Drivers Designed to Get Peak Performance Out of Your ADC >> VGAs for Driving High Speed ADCs >> Fully Differential IF Amplifiers >> Current Feedback Differential ADC Drivers for High Gain >> 16-Bit ADC Driver Simplifies Signal Conditioning >> ADC Driver Supports Converter Performance >> All prices in this bulletin are in USD in quantities greater than 1000 (unless otherwise noted), recommended lowest grade resale, FOB U.S.A.
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Differential Input, Dual, Simultaneous Sampling SAR ADCs Achieve Highest Performance at Lowest Power
Today's designs for motor control and automotive applications require ADCs that have high speed to digitize auxiliary input and output signals, real-time results output to the processor, and simultaneous sampling to maintain correct phase information. Meeting these needs in a compact footprint is a challenge faced by all IC suppliers. The AD7357 14-bit, 4.2 MSPS, dual-channel simultaneous sampling ADC is unlike any other SAR ADC on the market. The part contains two ADCs, each preceded by a low noise, wide bandwidth track-and-hold circuit that can handle input frequencies in excess of 200 MHz. In addition, the device uses advanced design techniques to achieve very low power dissipation at high throughput rates. With 2.5 V supply and a 4.2 MSPS throughput rate, the part typically consumes 14 mA. The AD7357 also offers flexible power/throughput rate management options and is available in a small 16-lead TSSOP. An ideal method of applying differential drive to the AD7357 is to use a differential amplifier such as the AD8138. Alternatively, an op amp pair can be used to convert a single-ended signal into a differential signal for a bipolar and unipolar input signal, respectively. In this case, the AD8022 dual op amp is an ideal selection. ADI offers an extended portfolio of high performance ADC products offering various speeds and resolutions or increased channel count to suit all design needs.
AD7357 Features
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