Spectral Analysis Tool; Figure 6-5. Spectral Analysis Tool; Table 6-1. External Source Requirements For Device Evaluation (Snr And Thd) - Texas Instruments ADS8354EVM-PDK User Manual

ADS8354EVM-PDK Operation

6.3 Spectral Analysis Tool

The Spectral Analysis tool
SINAD, and ENOB) of the ADS8354 SAR ADC through the use of a single-tone, sinusoidal signal FFT analysis,
using the 7-term Blackman-Harris window setting. Alternatively, the window setting of None can be used to
search for noise spurs over frequency in DC inputs.
For dynamic performance evaluation, the external, fully differential source must have better specifications
than the ADC to make sure that the measured system performance is not limited by the performance of the
signal source. Therefore, the external reference source must meet the source requirements listed in
Alternately, the user can use the
input signal for driving the input of the ADC, and pairs with most of the TI SAR ADC evaluation modules (EVMs).
The board is powered over a USB, which also provides a user-interface connection to a PC.

Table 6-1. External Source Requirements for Device Evaluation (SNR and THD)

Specification Description
External source common-mode
16 ADS8354EVM-PDK Evaluation Module
(Figure 6-5) is intended to evaluate the dynamic performance (SNR, THD, SFDR,
precision signal injector EVM
Signal frequency
External source type
Minimum SNR
Minimum THD

Figure 6-5. Spectral Analysis Tool

Copyright © 2023 Texas Instruments Incorporated
that provides a low-distortion, low-noise, 2-kHz
Specification Value
2 kHz
Fully differential
0 V
90 dB
–115 dB
www.ti.com
Table 6-1.
SBAU407 – APRIL 2023
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