SLAAED3A October   2023  – May 2024 TAA5212 , TAA5242 , TAC5111 , TAC5112 , TAC5142 , TAC5211 , TAC5212 , TAC5242

 

  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. 3Power Tune Mode and Analog Mixing Feature
    1. 3.1 Differential AC Coupled Power Tune Mode
    2. 3.2 Analog Mixing
  7. 4Summary
  8. 5References
  9. 6Revision History

2.1 Differential AC Coupled Configuration

In the AC-Coupled differential input configuration, the following device register setting is used and the respective input waveform provided to IN1P/M for the full-scale swing. Change the register setting in line 13 and 14 for the different input impedance and common-mode tolerance setting B0_P0_R80 (0x50) and B0_P0_R85 (0x55). The following plots are based on Mode 0 with 5KΩ input impedance.

Differential AC-Coupled Register SettingFigure 2-1 Differential AC-Coupled Register Setting
Differential AC-Coupled Input Swing at -1dBrG (0dBrG = 2Vrms)Figure 2-2 Differential AC-Coupled Input Swing at -1dBrG (0dBrG = 2Vrms)
A frequency plot of the Dynamic Range with -60dBrG input and SNR with input AC signal shorted to ground are provided here of the 100mVpp common-mode setting. A similar plot can be obtained for the 2 different common-mode tolerances.
Differential AC-Coupled Dynamic Range at -60dBrG InputFigure 2-3 Differential AC-Coupled Dynamic Range at -60dBrG Input
SNR with Input AC Signal shorted to GNDFigure 2-4 SNR with Input AC Signal shorted to GND

Table 2-2 summarizes the performances for the three different common tolerances across the input impedance for the different software control device variants. Table 2-3 summarizes the performances for hardware pin control devices which supports 5KOhm input impedance only in differential AC-Coupled.

Table 2-2 AC-Coupled Performance Summary - Software Control Device
DR (dB) SNR (dB) THDN (at-1dBrG)
HCMT Mode Zin TAC521x TAC511x TAA521x TAC521x TAC511x TAA521x TAC521x TAC511x TAA521x
0 5K 118 103 118 118 103 118 -95 -91 -95
10K 113 103 113 113 103 113 -102 -91 -102
40K 101 103 102 102 103 102 -97 -91 -97
1 5K 116 102 116 116 102 116 -95 -91 -95
10K 112 102 112 112 102 112 -102 -91 -102
40K 100 102 101 101 102 101 -96 -91 -97
2 5K 113 101 113 113 101 113 -95 -91 -95
10K 109 101 109 109 101 109 -101 91 -101
40K 99 101 100 100 101 100 -96 -91 -96
Table 2-3 AC-Coupled Performance Summary - Hardware Control Device
DR (dB) SNR (dB) THDN (at-1dBrG)
MD5-MD4 Zin TAC5242 TAC5142 TAA5242 TAC5242 TAC5142 TAA5242 TAC5242 TAC5142 TAA5242
00 5K 117 101 117 117 101 117 -95 -91 -95