ADAU1701 vs. AD1941

Sebastian on Dec 21, 2011

Hello,

I have to expand a digital-radio-transceiver for automotive applications by a DSP. The DSP has the task to equalize music by using various profils (e.g. rock, pop, flat, bass enhancement). The choice which profile will be used should be controlled by a microcontroller. Now I am looking for a suitable DSP. In summary the DSP has to fulfil following requirements:

-made for automotive applications

-I2C interface to communicate with the microcontroller

-I2S input and output

-max 5V supply voltage

-min. 2 MHz clock frequency at the I2S output

-EQ settings easy programmable

-EQ settings manageable by the microcontroller

I have found two DSPs which would be suitable but I do not know which one would be better for my application. I have found the AD1941 and ADAU1701.

I hope you can understand my request and help me

Regards,

Sebastian

0 ADIApproved

on Dec 21, 2011 9:48 PM

Hi Sebastian

The ADAU1701 is not automotive compliant, but the ADAU1401A, which is pin-compatible and functionally equivalent, is OK.

Here's a table that should help you decide:

Sebastian's requirements	AD1941	ADAU1401A
made for automotive applications	Yes	Yes
I2C interface to communicate with the microcontroller	Yes	Yes
I2S input and output	Yes	Yes
max 5V supply voltage	No, 3.3 V max	No, 3.3 V max
min. 2 MHz clock frequency at the I2S output	Yes, usually 3.072 MHz	Yes, usually 3.072 MHz
EQ settings easy programmable	Yes	Yes
EQ settings manageable by the microcontroller	Yes	Yes
*Additional features...*
Selfboot from EEPROM	No	Yes
GPIOs for external control	No	Yes
Auxiliary control ADC	No	Yes
Digital audio channels	16	8
Analog inputs	0	2
Analog outputs	2	4

Brett