The PCM1822-Q1 is a high-performance, low-power, stereo-channel, audio analog-to-digital converter (ADC) with flexible audio interface control options. This device is intended for applications in automotive head units, display control unit, Active Noise Cancellation and Acoustic Echo Cancellation applications. The high dynamic range of the device enables far-field audio recording with high fidelity. This device integrates a host of features that reduces cost, board space, and power consumption in space-constrained applications. The device features are controlled through hardware by pulling pins high or low with resistors or a controller general-purpose inut/output (GPIO). The PCM1822-Q1 also supports a power-down and reset function by means of halting the system clock.

The PCM1822-Q1 consists of the following blocks and features:

• Stereo-channel, multibit, high-performance delta-sigma (ΔΣ) ADC
• Differential/Single-Ended audio inputs with a 1-V_RMS full-scale signal
• Hardware pin control operation to select the device features
• Audio bus serial interface master or slave select option
• Audio bus serial interface format select option
• Slave mode supports the audio bus serial interface up to 192 kHz sampling
• Slave mode supports a dynamic range enhancer (DRE) with 117-dB dynamic range for the PCM1822-Q1
• Slave mode supports decimation filters with linear-phase or low-latency filter selection
• Master mode operation supported using a system clock of 256 × f_S or 512 × f_S
• Power-down function by means of halting the audio clocks
• Integrated high-pass filter (HPF) that removes the DC component of the input signal
• Integrated low-jitter phase-locked loop (PLL) supporting a wide range of system clocks
• Integrated digital and analog voltage regulators to support single-supply, 3.3-V operation