SBAA611 October   2024 TAC5111 , TAC5112 , TAC5211 , TAC5212

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2TAC5212 and TAC5211 Power Consumption
    1. 2.1 TAC521x: Target Mode Power Consumption With PLL Disabled
    2. 2.2 TAC521x: Target Mode Power Consumption with PLL Enabled
  6. 3TAC5112 and TAC5111 Power Consumption
    1. 3.1 TAC511x: Target Mode Power Consumption With PLL Disabled
    2. 3.2 TAC511x: Target Mode Power Consumption With PLL Enabled
  7. 4Settings for Lowest Power Consumption
    1. 4.1 Power Tune Options
  8. 5Summary
  9. 6References

4 Settings for Lowest Power Consumption

To minimize the power consumption of the TAC5x1x devices, verify that unused modules are disabled, use the lowest sampling rate, bit clock, and controller clock required by the application, and operate at the lowest AVDD and IOVDD supply voltages possible. The following list summarizes the settings and registers for lowest power operation:

  • Operate at the lowest supply voltage possible. AVDD and IOVDD support a 1.8V or 3.3V supply, independently (AVDD and IOVDD can have different supply voltages).
    • Unused analog inputs, tie to analog ground.
    • Unused digital inputs, tie to digital ground.
    • Unused outputs, leave unconnected.
  • Disable unused DAC and ADC and PDM channels through the CH_EN register.
  • Disable MICBIAS power, if unused, through the PWR_CFG register.
  • Operate at the lowest sample rate possible.
  • Disable PLL if the system supplies a low jitter controller clock (these settings are discussed in the PLL Disabled sections, refer to the Table of Contents).
  • Disable unused post-processing blocks:
    • Disable biquad filters, if unused, through the DSF_CFG0 and DST_CFG1 registers for ADC and DAC, respectively.
  • Select ultra-low latency filters over linear-phase decimation filters, if the application allows, through the DSP_CFGx register.
  • Use the smallest word length allowed by the application for the primary and secondary audio serial interfaces (ASI), using PASI_CFG0 and SASI_CFG0, respectively.