ONET1151L: suitability

Revanth A1

Part Number: ONET1151L

Hi,

We have the laser diode of the following Spec

here as you can see in image attached the operating voltage is 1.2V. Is it possible to use ONET1151L as a laser driver? I actually saw the schematic of ONET1151L provided in the TI website (http://www.ti.com/lit/df/tidr437/tidr437.pdf) will this driver ic suits us if we change BIAS TEE section voltage to 1.2V? In addition to that we saw the test reports of ONET1151L IC (http://www.ti.com/lit/ug/tidu241/tidu241.pdf) , here they have tested it with NX8349TS laser diode and its operational voltage is 2 V but the Vcc mentioned in the report is 3.3v. also just curious in the report Icc current is mentioned as 195mA to 234mA but in datasheet in the absolute maximum ratings no where these much of current value is mentioned and what is that Icc?

So if you can explain this i can use this driver IC in our project to transmit 10Gbps data.

over 4 years ago

0 Nasser Mohammadi over 4 years ago

TI__Guru* 88905 points

Hi Revnath,

1). Please note ONET1151L is differentially AC coupled to this laser. You can use 1.2V, 2V, or 3.3V to bias the laser.

2). I believe here this power is referring to the whole reference design including limiting amp and etc.

Regards,, Nasser

0 Revanth A1 over 4 years ago in reply to Nasser Mohammadi

Intellectual 300 points

Hi, Nasser

Thanks for the update, so in the bias tee circuit i can give 1.2V for the laser diode as shown in the image right?

0 Nasser Mohammadi over 4 years ago in reply to Revanth A1

TI__Guru* 88905 points

Hi Revanth,

We should have 1.2V on C6 only. We should leave C9 and C26 at 3.3V. Please note you may need to optimize RLC values to achieve optimum optical eye diagram.

Regards,, Nasser

0 Revanth A1 over 4 years ago in reply to Nasser Mohammadi

Intellectual 300 points

Hi, Nasser

Thanks for the info!

Interface

Interface forum

ONET1151L: suitability