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The Analog Devices AD4857 is a high-performance, 8-channel, simultaneous sampling data acquisition system (DAS) designed for applications requiring precision, speed, and flexibility. Each of its eight channels is fully buffered and capable of 16-bit resolution at a throughput of 1 mega-sample per second (MSPS), allowing for accurate and synchronized data capture across multiple inputs. This makes the AD4857 particularly suitable for use in industrial automation, instrumentation, and signal processing systems where precise multi-channel data acquisition is critical.
A key feature of the AD4857 is its differential input architecture with a wide common-mode range, enabling it to directly digitize signals with varying voltage levels without the need for extensive external signal conditioning. The device incorporates seamless high dynamic range (SHDR) technology, which automatically optimizes the input signal path gain on a per-sample basis. This innovation enhances signal-to-noise ratio (SNR) and dynamic range, achieving typical values of 94.6 dB and 98.1 dB, respectively, ensuring high fidelity in signal representation .
The AD4857 offers digital flexibility through its support for both SPI CMOS and LVDS serial interfaces, accommodating a range of system requirements. Its compact 7 mm × 7 mm, 64-ball BGA package includes integrated supply decoupling capacitors, reducing the need for additional external components and simplifying PCB layout. Furthermore, the device provides optional per-channel offset, gain, and phase correction capabilities, allowing for fine-tuning and calibration to meet specific application needs.
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