LMH6401EVM: LMH6401EVM

Hello Ariel,

Have you confirmed the status indicator on the GUI & confirmed nominal supply voltage/current? This is discussed further in section 6 of the EVM user's guide.

Best,

Hasan Babiker

Hi 
the status of GUI is connected (Green ) and scope confirmed that data transmitted (at SDI , SCLK and CS )  
the power consumption is about 70mA  and connected power to +2.5 and -2.5 , 

there is a signal at the output (with default attenuation ) - means that the device is working 

Regards 

Hello Ariel,

Can you confirm that no modifications have been done to EVM hardware? Can you provide screenshots of both high-level on low-level view of the GUI?

Best,

Hasan Babiker

Also can you try connecting jumper Jpd & confirming the device goes into power-down mode by measuring supply current?

Best,

Hasan Babiker

Hi 

1.  attach a photo of 2nd EVB ( at the 1st one I had change to 5V operation by shorting RB- and adding bias to input)

2. see PD jumper as small influence (the right one is the -2.5) first image low power 

GUI at 2  option (with probe connection and with out)

Hello Ariel, 

It looks like your first two images didn't attach properly. Can you reupload? Please use the Insert/Edit Media button to add images.

Best,

Hasan Babiker

Hello Hasan

we had replace the IC's and both boards are now working !!! ( maybe we had some damage when make the touch-up)

2nd issue drive from single end source  

at simulation when working in single source (drive INP with 0.7V on Common mode ) I get at output, as expected, two signals with 180 phase 
but on EVB , the outputs are at same phase 
where is the problem  ?

note: we use the amplifier in 5V single power and the common mode is set to 2.5V 
Regards Ariel  

attach image 

Hello Ariel,

Glad to hear you were able to get the parts to work! Note in regards to your other issue, the LMH6401 is designed to work only with differential inputs. See image from the datasheet below:

Best,

Hasan Babiker