Digital signal amplification and attenuation

Aradhyasambhu Satpathy

Other Parts Discussed in Thread: CD40109B

Hello all,

I want to perform a Hardware in loop testing for automotive application using simulator which is not yet fixed.

To achieve this, I want to convert the digital signal coming from the simulator (16 V, 10 V, 5 V or 3.3 V different level because the simulator is not yet fixed) to be attenuated to 3.3 V for going to the digital input pins of the micro-controller.

Similarly, I want the digital output from the micro-controller at 3.3 V to be amplified to 3.3 V, 5 V, 10 V or 16 V depending on the simulator to be given as an input to the simulator.

Please suggest me how this can be achieved?

over 5 years ago

0 Clemens Ladisch over 5 years ago

Guru 316510 points

The only logic family going above 5 V is CD4000, so you need something like the CD40109B(-Q1). At 3.3 V, it will be very slow.

0 Aradhyasambhu Satpathy over 5 years ago in reply to Clemens Ladisch

Intellectual 540 points

I want to amplify my digital output from microcontroller to be amplified to higher voltage. Similarly I want to attenuate my signals coming from simulator to attenuate for my microcontroller.

0 Clemens Ladisch over 5 years ago in reply to Aradhyasambhu Satpathy

Guru 316510 points

Yes, this device can convert between two voltages. What exactly is your question?

0 Aradhyasambhu Satpathy over 5 years ago in reply to Clemens Ladisch

Intellectual 540 points

I want to translate 16 V / 10 V / 5 V / 3.3 V to 3.3 V.

Moreover, I also want to translate 3.3 V to 16 V / 10 V / 5 V / 3.3 V.

I want to achieve the buck operation using one IC and boost operation through another IC.

Please suggest me which IC can be achieved for all the voltage level mentioned above.

The variable voltage is because the simulator is not fixed

0 Clemens Ladisch over 5 years ago in reply to Aradhyasambhu Satpathy

Guru 316510 points

The CD40109B supports all the voltage levels mentioned above.

0 Aradhyasambhu Satpathy over 5 years ago in reply to Clemens Ladisch

Intellectual 540 points

Hi Celmens.

Thank you for your reply.

I am not able to find the spice model of CD40109B. Could you please help me with that. I need to simulate and verify the same before using it in my design.

0 Dylan Hubbard over 5 years ago in reply to Aradhyasambhu Satpathy

TI__Mastermind 45725 points

Hi,

This device is quite old and it was acquired from Harris, unfortunately we don't have a spice model for it. However, it can be prototyped using the EVM listed on the product page.

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Digital signal amplification and attenuation