ADAU1701 vs. AD1941

SigmaDSP & SigmaStudio Sebastian Dec 21, 2011 00:00 1 replies Original on forum ↗

ICs: AD1941 ADAU1701

Sebastian Question

Dec 21, 2011 00:00

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

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ADIApproved Reply

Dec 21, 2011 00:00

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

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