Asahi Kasei Microdevices Corporation, (AKM), has developed a 6ch A/D converter, (ADC), the AK5736 for microphones in Active Noise Cancellation, (ANC *), systems implemented in car audio.  The AK5736 features the low latency of 4.3 [1/fs] required for high speed processing with built-in capability to supply microphone power internally.  The AK5736 also has a diagnostic function to monitor microphone connection.  As a new feature, the AK5736 has an analog gain circuit setting to set a high gain level thus keeping high.

 

This product is an upgrade of the AK5730, a 4ch ADC for microphones, released in 2014.

 

。Active Noise Cancellation

 

Features

 

。 Signal Processing with Low Latency

The AK5736 features 4.3 [1/fs] low latency signal processing.  This is perfect for an ANC system requiring real time processing.

 

。 Microphone Power Supply Output (External power supply for microphones is not necessary)

This product can supply a maximum of 15mA per channel per microphone.  External microphone power supplies are unnecessary.

 

。 Microphone Connection Monitoring

The AK5736 integrates, “Diagnostic function”, monitoring for microphone or harness connections.  In response to customer requests for amplifier units and head units, high accuracy diagnostic mode detecting with 12-bit accuracy has been newly added in addition to the simple diagnostic mode monitoring with 100mV accuracy.

 

Main Specifications

Product Name		AK5736VN	AK5730VQ
ADC	Channel	6ch	4ch
	Input Voltage	2Vrms	1.65Vrms
	DR	100dB (Typ.)	100dB (Typ.)
	THD+N	-92dB (Typ.)	-92dB (Typ.)
	CMRR	85dB (Min.)	80dB (Min.)
	PSRR	80dB (Typ.)	50dB (Typ.)
Analog Amplifier		0,  +6 to +20dB	+9dB
MIC bias	Noise	-100dBV	-100dBV
	Current	15mA (/ch)	10mA (/ch)
Diagnostics Accuracy		100mV step/12-bit	100mV step
Digital Filter Group Deley		4.3 [1/fs]	16.4 [1/fs]
TDM format		8ch/16ch	8ch
MIC bias Generator		Charge Pump/Battery	Charge Pump
Operation Temperature Range		-40 to +105°C	-40 to +105°C
Package		48-pin QFN	48-pin LQFP

source：http://www.akm.com/