Microchip Technology PIC32 Audio Codec Daughter Card (AC327755)

Microchip Technology PIC32 Audio Codec Daughter Card (AC327755) is a high-performance stereo codec board for selected hardware development platforms. This board features the AK7755 Stereo Codec Module, which includes built-in microphone and headphone amplifiers. The AK7755 Module is a 16/20/24-bit Audio Codec with I²C and I²S serial interfaces. The I²C interface is used for control command transfer. The I²S interface is used for Audio data output.

This AK7755 PIC32 Audio Codec Daughter Card is suitable for adding audio input and output capabilities to the PIC32 BLUETOOTH® Starter Kit (DM320018) and is compatible with the PIC32 Bluetooth Audio Development Kit (DV320032).

Features

Two Digital Interfaces (I/F1, I/F2)
4-channel/6-channel Digital Signal Input Port:MSB justified 24-bit
LSB justified 24/20/16-bit
I2S
Short/Long Frame
24-bit linear, 8-bit A-law, 8-bit μ-law
TDM 256fs (8-channel) MSB Justified and I2S Formats
SoftMute: On and Off
Stereo 24-bit ADC:
- Sampling Frequency: fs = 8kHz to 96kHz
- ADC Characteristics S/(N+D): 91dB, DR, S/N: 102dB
- Two-Channel Analog Input Selector (Differential, Single-ended Input)
- Channel Independent Microphone Analog Gain Amplifier (0dB to 18dB (2dB Step), 18dB to 36dB (3dB Step))
- Analog DRC (Dynamic Range Control)
- Channel Independent Digital Volume (24db to -103dB, 0.5dB Step, Mute)
- Digital HPF for DC Offset Cancelling

Mono 24-bit ADC:
- Sampling Frequency: 8kHz to 96kHz
- ADC Characteristics S/(N+D): 90dB; DR, S/N: 100dB
- Line Amplifier: 21dB to -21dB, 3dB Step
- Digital Volume (24dB to -103dB, 0.5dB step, Mute)
- Digital HPF for DC Offset Cancelling
Stereo 24-bit DAC:
- Sampling Frequency: fs = 8kHz to 96kHz
- Digital Volume (12dB to -115dB, 0.5 step, Mute)
- Digital De-emphasis Filter (tc = 50/15μs, fs = 32kHz, 44.1kHz, 48kHz)
- Master Clock: 2560fs (internally generated by PLL from 32fs, 48fs, 64fs, 128fs, 256fs and 384fs clock)