• AEC-Q100 Qualified with Operating Temperature Grade 1
• 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
• Package Size: QFN4×4-24

The SA55621 is an audio codec for automotive telematics hands-free communication. 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 SA55621 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 SA55621 is available in a compact QFN4×4-24 package.