Description:Analog to Digital Converters - ADC 12-Bit 1.25MSPS Single-Supply SAR ADC Data Acquisition System With Programmable Bipolar Input Ranges 16-TSSOP -40 to 125
Texas Instruments provides a recommended layout and routing guide in the ADS8661IPW datasheet (Section 10.1) and in the ADS8661IPW Evaluation Module User's Guide (SLAU445). It's essential to follow these guidelines to ensure optimal performance and minimize noise.
The ADS8661IPW has an internal 2.5V reference voltage, which can be enabled or disabled using the REFEN pin. When enabled, the internal reference is used as the ADC's voltage reference. For more information, refer to the datasheet (Section 7.3.1) and the ADS8661IPW Configuration and Calibration Guide (SLAU446).
The ADS8661IPW can achieve a maximum sampling rate of 500 kSPS. To achieve this rate, ensure that the clock frequency is set to 40 MHz, and the ADC is configured in the 'Fast' mode (see datasheet, Section 7.3.2). Additionally, optimize the layout and routing to minimize noise and ensure proper signal integrity.
The ADS8661IPW outputs data in a 16-bit, two's complement format. The output data alignment can be configured using the DOUTA and DOUTB pins. For more information on data formatting and alignment, refer to the datasheet (Section 7.4) and the ADS8661IPW Data Sheet Addendum (SLAU447).
The ADS8661IPW requires a specific power sequencing to ensure proper operation. The recommended power-up sequence is: AVDD, DVDD, and then CLKIN. The power-down sequence is the reverse of the power-up sequence. For more information, refer to the datasheet (Section 10.2).
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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.
