Description:• 200-kHz Minimum Sampling Rate • Portable Test Equipment
• 4-V, 5-V, and ±10-V Input Ranges with • USB Data Acquisition Module
High-Impedance Input • Medical Equipment
• ±1.5 LSB Max • Industrial Process Control
INL
• +1.5/–1 LSB Max/Min DNL, 16 Bits NMC • Digital Signal Processing
• Instrumentation
• ±2-mV Max BPZ, ±0.6 ppm/°C BPZ Drift
• ±2-mV Max UPZ, ±0.15 ppm/°C UPZ Drift
• 88.8-dB SINAD with 10-kHz Input
The ADS8517 is a complete low-power, single 5-V
• SPI™-Compatible Serial Output With
Texas Instruments provides a layout guide in the application note SLAA523, which recommends a 4-layer PCB with a solid ground plane, and careful routing of analog and digital signals to minimize noise coupling. Additionally, it's recommended to use a low-ESR capacitor for the AVDD pin and to decouple the DVDD pin with a 0.1uF capacitor.
To optimize performance, ensure that the analog input signal is properly filtered and buffered, and that the reference voltage is stable and noise-free. Additionally, use a low-noise power supply, and consider using a ferrite bead or a pi-filter to reduce high-frequency noise on the power lines. Finally, ensure that the PCB layout is optimized for low noise and distortion.
The maximum sampling rate of the ADS8517IPW is 250kSPS, and it can be achieved by using the internal clock and setting the appropriate clock divider. However, increasing the sampling rate will also increase the power consumption, which can be estimated using the formula provided in the datasheet. At maximum sampling rate, the power consumption is approximately 35mW.
The ADS8517IPW can be interfaced with a microcontroller using the SPI interface. Key considerations for successful communication include ensuring that the microcontroller's SPI clock frequency is within the recommended range, using the correct SPI mode, and handling the conversion results correctly. Additionally, ensure that the microcontroller's digital output pins are not overloaded, and that the communication protocol is properly implemented.
The ADS8517IPW has a higher sampling rate and resolution compared to the ADS8513, and also has a lower power consumption. Additionally, the ADS8517IPW has a wider input range and a more flexible input configuration. However, the ADS8513 has a lower cost and is more suitable for lower-speed applications.
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ADS8517IPW Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
