Confirm Schematics of AFE4404 , Question about NJL5513R(New Japan Radio)

Inho Jeon

Expert 1452 points

Other Parts Discussed in Thread: AFE4404

Hi, All!

I attach Two schematics of AFE4404.

One is using NJL5513R, another is NJL5310R and IR LED.

Please, Confirm that schematics, ASAP.

NJL5513R is not available. So, I designed schematics using NJL5310R and Red LED instead of NJL5513R.

And, I have a question about NJL5513R(New Japan Radio).

that part is seems to be not available ; not available datasheet and not purchase.

Please, inform NJL5513R me.

I'd like to SPO2 and PPG sensor with AFE4404.

On User Guide about AFE4404, using LED of RED,Green,IR. Is it neea all LED of 3?

Best Regards,

Inho Jeon

.AFE4404_SCH.pdf

7585.AFE4404_NJL5513R.pdf

over 9 years ago

0 Amy Schnoor over 9 years ago

TI__Mastermind 18285 points

Inho,

We have received your post and hope to have a response back to you soon.

0 Praveen Aroul over 9 years ago

TI__Mastermind 49906 points

Hello Inho,

Contact NJRC for questions related to NJL5513R.

Below are my comments and suggestions after reviewing your schematics.
1. There is no information about the power management block. What is the TX_SUP and RX_SUP voltage?
2. If you are using the internal oscillator mode, the CLK pin must be terminated with 500K shunt resistor.
3. The ADC_RDY signal must be connected to an interruptible GPIO pin of MCU. The MCU should read the ADC result registers based on the interrupt from the ADC_RDY signal.
4. The I2C lines (I2C_CLK and I2C_DAT) should be connected to external pull up resistor to IO_SUP.
5. Since the photodiode outputs are prone to picking up RF noise, a common-mode choke
may become essential to add in the path of the AFE inputs to reject the interference.
6. The device can draw high switching currents from the TX_SUP pin. Provide a bulk capacitor of 10uF or higher at the LED common anode pins.

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Confirm Schematics of AFE4404 , Question about NJL5513R(New Japan Radio)