TLV1701-Q1: Absolute Max Signal Input Levels

Dimitri Georgaras

Part Number: TLV1701-Q1

I have a question regarding the TLV1701QDBVRQ1 absolute max signal input levels.

The datasheet specifies that the maximum signal input voltage is (Vs+) + 0.5, and the maximum input current is ±10mA.

Note 2 also states that the input pins are diode clamped and any signal above 0.5V the supply voltage should be current limited to less then 10mA. Screenshot of datasheet below for reference:

I have two questions:

Is it SAFE to current limit the input pins below 10mA such that it does not impact reliability of the component?
1. I am assuming that the 10mA limit is stated as the current limit for the clamping diodes are 10mA. Is this the case?
2. If 10mA is the absolute max, should we aim for 5mA max or less?

What exactly is the input diode clamping scheme? Is it the standard two clamping diodes or is there anything else for this specific part?

I’m pretty sure I’m interpreting the datasheet correctly, just hoping to get some clarification.

over 1 year ago

+1 Paul Grohe over 1 year ago

TI__Mastermind 49766 points

Hello Dimitri,

There are ESD clamp diodes to each supply to the pins.

The diodes are designed for short, fast ESD events and not continuous current, so they are limited to how much current they can continuously handle.

10mA is the abs-max, but we recommend keeping the current as low as possible, preferably 1mA or less. This is easily done by adding a series resistance to the input (can be part of a voltage divider).

0 Dimitri Georgaras over 1 year ago in reply to Paul Grohe

Prodigy 50 points

Hello Paul, Thank you for the quick reply.

This did answer my question.

Regards,

Dimitri

+1 Paul Grohe over 1 year ago in reply to Dimitri Georgaras

TI__Mastermind 49766 points

Hi Dimitri,

Actually, the protection on the output is a little more sophisticated, as the output can be pulled-up up to 36V, regardless of the supply voltage. So it does not have a physical diode on the output which would not allow that. Since what is done is proprietary, I cannot discuss it openly here. But there is not a diode between the output and the supply (but there is a clamp). There are diodes from the inputs to the supply as shown, so that part is correct.

0 Dimitri Georgaras over 1 year ago in reply to Paul Grohe

Prodigy 50 points

Thank you for the clarification, Paul

Amplifiers

Amplifiers forum

TLV1701-Q1: Absolute Max Signal Input Levels