SBAA634 April   2026 TAA5212 , TAA5412-Q1 , TAC5111 , TAC5111-Q1 , TAC5112 , TAC5112-Q1 , TAC5211 , TAC5212 , TAC5311-Q1 , TAC5312-Q1 , TAC5412-Q1 , TAD5112 , TAD5112-Q1 , TAD5212 , TAD5212-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Detailed Description
    1. 2.1 Common Mode Tolerance Modes
    2. 2.2 Common-Mode Rejection
    3. 2.3 Device Performance Across CM_TOL Modes
  6. 3Summary
  7. 4References

2.3 Device Performance Across CM_TOL Modes

Additionally, some of the other performance parameters (like SNR) are impacted by the configured CM_TOL mode. Table 2-3 lists the SNR (A-weighted), Dynamic Range (A-weighted) and CMRR for the different modes measured on a TAC5112EVM-K and TAC5212EVM-K devices. The results are measured for a 1kHz, 100mVpp signal with a common-mode DC bias voltage, and averaged across both input channels.

These results indicate that if the user requires a higher common-mode tolerance at the input (and in the case of TAC5212, higher CMRR performance), it comes at the cost of performance reduction. For instance, configuring a TAC5212 device to operate at a CM_TOL mode of 2 provides a CMRR of 80dB (typ), however the SNR degrades by approximately 6-7dB (typ).

Table 2-3 Performance of TAx511x/TAx521x Across CM_TOL Modes
Device CM_TOL Mode Impedance Setting (kΩ) CMRR @ 100mVpp (dB) SNR (dBFS) A-Weighted Dynamic Range (dBFS) A-Weighted THD+N (dB)
TAC5212 0 5 66 119 119 -95
10 61 114 114 -101
40 48 103 103 -98
1 5 64 117 117 -95
10 61 113 113 -101
40 48 102 102 -97
2 5 84 112 112 -945
10 73 109 109 -100
40 78 100 100 -94
TAC5112 0 5 61 104 104 -98
10 58 103 103 -101
40 47 102 102 -97
1 5 61 104 104 -98
10 58 103 103 -100
40 47 101 101 -97
2 5 63 103 103 -97
10 58 102 102 -100
40 47 100 100 -96