LM98620: LM98620 Questions.

Ian Wang

Part Number: LM98620
Other Parts Discussed in Thread: DS90CR218A

Hi Sir,

Pls kindly help for LM98620 questions as below, thanks.

1. I checked datasheet shows OUTPUT use 2 sets 3+1 LVDS.

If the phase difference is fixed when TXCLK1 and TXCLK2(LVDS Clock) scan every times? Frequency will be diference?

2. My customer application is one CCD 12ch need 2 AFE, but LM98620 LVDS 3+1 2 sets is separate, it will need 4 PLL to lock LVDS clock

2 AFE with the same MCLK source, if phase and frequency between TXCLK1 and TXCLK2 will be difference once do RESET or Power Down?

Thanks, Ian.

0 Shinya Morita over 3 years ago

Hi,

Let me check your question and feedback to you by Dec 3rd.

regards

Shinya

0 Shinya Morita over 3 years ago in reply to Shinya Morita

Hi,

1. Phase difference between TXCLK1 and TXCLK2 is fixed. They are same frequency, phase and sync with MCLK.

2. As mentioned above, TXCLK1 and TXCLK2 are same phase. Therefor 6ch by one LM98620 are same phase.

3. 2 AFE with same MCLK , both AFE's TXCLK1/2 sync with MCLK. Frequency should be same, phase could be similar but may slightly different.

regards

Shinya

0 Ian Wang over 3 years ago in reply to Shinya Morita

Hi Shinya,

Datasheet shows a Deserializer DS90CR218A which is to 3.3V, do we have solution to 1.8V?

Thanks, Ian.

0 Shinya Morita over 3 years ago in reply to Ian Wang

Hi,

TI has 1.8V LDVS product such as SN65LV302. However LM98620 LVDS offset voltage max is 1.28V which does not meet this 1.8V product.

Please generate new post on LVDS product site if you have more questions related to LVDS receiver, not LM98620.

Thanks,

regards

Shinya

Data converters forum