48kHz 24-bit Monaural Audio CODEC with Analog Switch and PLL
More internet communication modules are now being installed in vehicles as popularity increases. AKM has released the AK4940VN, a monaural audio CODEC, (DAC + ADC), developed for communication modules.
Applications: Automotive Modules, (Data Communication Module: DCM, Telematics Control Unit: TCU), Drive Recorders, In-Vehicle Information: IVI, e-Mirrors (electronic mirror)
● e-Call system and Hands-free head units can share one Microphone
The AK4940VN has an analog direct path that outputs microphone input signal directly. Therefore, it is possible to share a microphone for emergency calls and for hands-free head units.
● Support differential/single-ended/pseudo differential signals
Integrated DAC, ADC and analog direct path support differential/single-ended/pseudo differential signal formats. The ADC has a programmable gain amplifier which supports a range from -6dB to +27dB and a digital volume control supporting from Mute to +24dB. The DAC has digital volume control supporting a range from Mute to +24dB, enabling to accept a broad signal range.
● Integrated PLL
The AK4940VN generates the internal master clock from a clock for audio data transmission. This eliminates the need for wiring a master clock, contributing low EMC and saving mounting space.
|24-bit Monaural Audio CODEC|
|Analog Direct Path||2 channels,|
Signal Amplitude max. 3Vpp
|Analog Input Pin||2 channels Differential||1 Channel Differential|
|Analog Output Pin||2 channels differential|
+ 1 channel Single-ended
|1 Channel Differential
|PLL with Loop Filter||Integrated||Integrated|
|Sampling Frequency||8 to 48kHz||8 to 48kHz|
|Analog Power Supply (AVDD)||3.0 to 3.6V||2.8 to 3.6V|
|Digital Core Power Supply (DVDD)||Not Necessary||1.6 to 1.98V|
|Digital I/O Power Supply (TVDD)||1.7 to 3.6V||1.6 to 3.6V|
|Operation Temperature Range||-40 to 105°C||-40 to 85°C|
|Package||24-pin QFN, 4 x 4mm, 0.5mm pitch||20-pin QFN, 3 x 3mm, 0.4mm pitch|
|AEC-Q100||Support (will be in May. 2019)||Supported (Dec. 2017)|
|Monaural 24-bit ADC|
|Microphone Amplifier||-6 to 27dB / 3dB step||0 to 30dB / 3dB step|
|Digital Volume||+24 to -103dB / 0.5dB step, Mute||+36 to -52.5dB / 0.375dB, Mute|
|Monaural 24-bit DAC (Line Output)|
|Digital Volume||+12 to -115dB / 0.5dB step, Mute||+36 to -52.5dB / 0.375dB, Mute|