SLAAED4 October   2023 TAA5412-Q1 , TAC5311-Q1 , TAC5312-Q1 , TAC5411-Q1 , TAC5412-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Analog Input Configuration
    1. 2.1 Differential AC Coupled Configuration
    2. 2.2 Single Ended AC Coupled Configuration
    3. 2.3 Differential DC Coupled Configuration
    4. 2.4 Single Ended DC Coupled Configuration
    5. 2.5 Analog Input Mux Configuration
  6. 3Analog Mixing
  7. 4Summary
  8. 5References

2.4 Single Ended DC Coupled Configuration

In the DC-Coupled single-ended input configuration, the following device register setting is used and the respective input waveform provided to IN1P for the full-scale swing.

GUID-20230929-SS0I-CXZ3-KFRV-3WCJMLN3G69J-low.pngFigure 2-14 Single Ended DC-Coupled Register Setting
GUID-20230929-SS0I-FWJT-ZVVW-00HNHGJXSS8G-low.pngFigure 2-15 Single Ended DC-Coupled Input Swing at -1dBrG (0dBrG = 5Vrms)

A frequency plot of the Dynamic Range with -60dBrG input and SNR with input AC signal shorted to ground are provided here.

GUID-20230929-SS0I-KV4K-TP8C-C9SGK8CFB8G6-low.jpgFigure 2-16 Single Ended DC Coupling Dynamic Range with -60dBrG Input
GUID-20230929-SS0I-W6ZF-CXQ2-CRFQHXGFJQTV-low.jpgFigure 2-17 Single Ended DC Coupling SNR

Table 2-4 summarizes the performances for each of the configuration previously.

Table 2-4 Input Configuration Performance Summaries
Input Configuration DR (dB) (-60dBrG) SNR (dB) (Input AC short to GND) THD+N (dB) (-1dBrG)
Differential AC-Coupled 112 112 -96
Differential DC-Coupled 112 113 -96
Single-Ended AC-Coupled 106 106 -80
Single-Ended DC-Coupled 106 107 -83