• Power Supplies:
•      -- 3.3V or 5V Analog Supply
•      -- 1.8V or 3.3V Digital IO Interface
• Audio DAC:
•      -- Digital Volume: +12 to -115dB, 0.5dB Per Step, Mute
•      -- Digital Filters: Sharp/Slow Roll-Off Filter
•      -- 2 Fully Differential Outputs and 1 Single-Ended Output
•      -- Differential Voltage Output: 5.8Vpp at 3.3V AVDD, 8.7Vpp at 5V AVDD
•      -- 107dB SNR, -83dB THD+N with Fully Differential Output
• Audio ADC:
•      -- 2 Fully Differential Inputs
•      -- Input PGA: -18 to +27dB, 3dB Per Step
•      -- Input Mixer
•      -- Digital Filters: Narrow Band Voice Filter, Wide Band Voice Filter, Full Band Voice Filter and 2 Optional Bi-Quad Filters
•      -- Differential Voltage Input: 4.5Vpp at 3.3V AVDD, 6.8Vpp at 5V AVDD
•      -- Digital Volume: +24 to -103dB, 0.5dB Per Step, Mute
•      -- 99dB SNR, -91dB THD+N
• Mic Direct Path Line Driver:
•      -- Mic Direct Path Boost Gain: 0 to +9dB, 3dB Per Step
•      -- 2 Fully-Differential Outputs
•      -- Differential Voltage Output: 5.8Vpp at 3.3V AVDD, 8.7Vpp at 5V AVDD
•      -- 108dB SNR, -96dB THD+N with Fully-Differential Output
• Audio Interface:
•      -- Supports Controller and Target Mode
•      -- Format: I²S, Left-/Right-Justified, TDM with 4/8/16 Slots
•      -- Supports Sampling Rates from 8 kHz to 96 kHz
•      -- Input/output Data Length: 16-bit, 20-bit, 24-bit, 32-bit
•      -- Slot Width: 16-bit, 24-bit, 32-bit
• I2C Control
• MSL Rating: MSL3
• Package Size: QFN4×4-24

The SQ58621 is a low power mono audio codec. It features two analog differential inputs with two programmable gain amplifiers and a mixer for the microphone. The device includes two differential output line drivers and one single-ended output. The SQ58621 is available as a I2S controller(I2S master) or target(I2S slave) device. The controller generates SCLK and LRCLK for the target for data transmission.

The high-resolution sigma-delta audio ADC converts analog signals to digital and transmits them to the host SOC via I2S or TDM serial data formats. The audio DAC converts the I2S or TDM serial data from the host SOC to analog outputs. An integrated analog direct path transmits the microphone input to the outputs with a high drive strength line driver. The SQ58621 is available in a compact QFN4×4-24 package.