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

2.3 Differential DC Coupled Configuration

In the DC-Coupled differential input configuration, the following device register setting is used and the input waveform provided to IN1P/M for the full-scale swing with 6 V Vcm.

GUID-20230929-SS0I-JBGZ-L3CJ-CTGDLLN4QFTF-low.pngFigure 2-10 Differential DC-Coupled Register Setting
GUID-20230929-SS0I-TJZF-KGVM-LHNZG9W4SCK9-low.pngFigure 2-11 Differential DC-Coupled Input Swing at -1dBrG (0dBrG = 10Vrms)

A frequency plot of the Dynamic Range with -60dBrG input and SNR with input AC signal shorted to ground are provided here of the 1Vpp common-mode setting. A similar plot can be obtained for supply common-mode tolerances.

GUID-20230929-SS0I-NRDR-F6W0-6MFTVGTGMFBZ-low.jpgFigure 2-12 Differential DC-Coupled Dynamic Range at -60dBrG Input
GUID-20230929-SS0I-FPLF-FJL5-GM4X0DPPLWTS-low.jpgFigure 2-13 SNR with Input AC Signal shorted to GND

Table 2-3 summarizes the performances for the different device variants.

Table 2-3 Device Variants
THDN (at-1dBrG) DR (dB) SNR (dB)
TAC541x TAA541x TAC531x TAC541x TAA541x TAC531x TAC541x TAA541x TAC531x
-101 -100 -89 112 112 101 112 112 101