10.1.1.1 Example Design Requirements

• Device control method: hardware control
  • Normal filter latency
  • I²S digital audio interface
  • Power rail monitoring from the system 12-V rail to mute early on system power loss
• Single-ended 2.1-V_RMS analog outputs
• 3-wire I²S interface (BCK PLL)
• Single 3.3-V supply

10.1.1.2 Detailed Design Procedure

• Device control method: See Pin Configuration and Functions and Audio Processing.
  • Normal filter latency: FLT pin tied low
  • Audio format selection: FMT pin tied low
• Clock and PLL setup (See Reset and System Clock Functions). Ensure incoming BCK meets minimum requirements.
• XSMT pin setup for 12-V monitoring (See External Power Sense Undervoltage Protection Mode).
• Single-supply 3.3-V operation (See Setting Digital Power Supplies and I/O Voltage Rails)

10.1.1.3 Application Curve

Figure 34. PCM5101A FFT Plot, DC to 20 kHz with a 1 kHz, –60dBFS Input