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# TS5A1066, confirmation of prefix at Fig.10 on the datasheets

Other Parts Discussed in Thread: TS5A1066

Dear Specialists,

My customer is considering TS5A1066 and has a question.

The datasheet (P.14) of  Figure 10. OFF Isolation (V+ = 5 V) describes Frequency (MHz) and scale is 100,1k, 10k, 100k and 1M.

This means 100MHz to 1GHz.

Is it correct?

In this case, he wants to know OFF Isolation from 10 to 100MHz.

Do you have any data?

Best regards,

Shinichi

• Shinichi1 said:
This means 100MHz to 1GHz.

The graph says the following: 100MHz, 1,000MHz, 10,000MHz, 100,000MHz, 1,000,000MHz:

Shinichi1 said:
OFF Isolation from 10 to 100MHz

There is a value given in the datasheet for 10MHz: -68dB.

From the graph you can see that it is about -71dB @ 100MHz.

• Dear Dennis

I understand Figure 10. is from 100MHz to 1GHz.

In this case, the customer wants to use 10kHz to 100kHz rather lower frequency, so he needs to confirm.

How can he consider?

Do you have any data?

Best regards,

Shinichi

• Hi Dennis ,
thanks for your inputs . This looks to be typo on the units on the x-axis graph to me.
It needs to be kHz and not Mhz to me. Same applies to the bandwidth graph as well.
I will make a correction request for the datasheet .
• When editing the graph I first thought that testing the device with 1THz is questionable. The bandwidth is 400MHz. But who knows what TI has in it's labs...

But after a second look you may be right - the given -68dB at 10MHz fit quite well if you replace MHz by kHz:

Dennis

• Dennis ,
I was baffled when I looked in the graph too . This was released long back before I joined but checking into the char data , the preliminary datasheet had the graph titles and then the plots were added later but never checked back into the units. comparing the numbers on the spec and the graph made sense to have kHz and all fall into place.
• Dear Shreyas

I have to respond to the customer, let me confirm again.

(1)Can I consider kHz is correct?

The graph of X-axis is  from 100kHz to 1GHz, right?

(2)I'd like to know the spec from 10kHz to100kHz.

Could you please confirm and feedback.

Best regards,

Shinichi

• hi Shinichi san ,

The data I see doesn't have the numbers for 10kHz , The graph starts from 100Khz .
the crosstalk at lower frequencies should be minimal <-95dB.
• Dear Sheyas

The graph is from 100kHz to 1GHz, and crosstalk (10kHz~100kHz)is less than 95dB

If he has an additional question, I'll consult.

Best regards,

Shinichi

• Dear Sheyas

As you mentioned -95dB less than 100kHz, but TS5A1066 of Figure10. off isolation at 100kHz is around -70dB.

He'd like to know the reason why -95dB.

Shinichi

• Hi Shinichi san ,

sorry , I must have referred to graph from another device.
The information is not available to me in the char report ; and I wouldn't want to mislead the customer with my estimation. It looks like a -20dB /decade curve ideally and at Dc it should be completely isolated . I don't completely understand why the 'V' curve , could be limitation of the measurement meter itself.
• Dear Shreyas

I must respond the data to the customer.

Do you have any data of similar device in place of TS5A1066?

It is still OK.