Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the analog and digital traces separate. Additionally, use a low-ESR capacitor for the AVDD pin and a 0.1uF capacitor for the REF pin. Route the analog input traces away from the digital traces and avoid crossing them over.
The ADS7953SBRHBR has a power-on reset (POR) circuit that ensures the device is in a valid state after power-up. However, it's recommended to add an external reset circuit to ensure the device is in a valid state after power-up. A 10kΩ pull-up resistor on the RESET pin to AVDD and a 0.1uF capacitor from RESET to GND can be used.
A low-jitter clock source is recommended, such as a crystal oscillator or a high-quality clock generator. To minimize clock jitter, use a clock source with a jitter of less than 100ps, and ensure the clock signal is routed away from noisy digital signals. Additionally, use a clock buffer or a clock conditioner to further reduce jitter.
The ADS7953SBRHBR outputs 16-bit data in a serial format. It's recommended to use a SPI or QSPI interface to transfer the data to a microcontroller or FPGA. Use a dedicated SPI or QSPI interface module to handle the data transfer, and ensure the clock and data lines are properly terminated to minimize signal reflections.
The ADS7953SBRHBR has an internal calibration circuit that can be used to calibrate the device. It's recommended to calibrate the device during power-up or after a reset. The calibration procedure involves writing a specific code to the device's control register. The calibration procedure should be performed at power-up or after a reset, and it's not necessary to recalibrate the device during normal operation.
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ADS7953SBRHBR 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.
