schematicssymbol [~]
I am looking at the data sheet for the iC-NZN N-type laser diode driver.
What does the marked symbol stand for?
It appears in a number of places, always marking IO pins.
My guess would have been that it is a current limiter, but then why not just draw a resistor…
This device is a transient voltage suppressor for USB D+ and D- signals. It protects the device from static voltages that may develop when inserting or removing USB devices to connectors.
The four diodes (on side) act as clamping diodes that conduct to suppress ESD.
This or similar device can be found in this Semtech catalog
The diagram on page 631 of the user guide has it labeled "Temp. Sensor".
This is the internal Block Diagram for the SD24_A ADC, but it's almost functionally the same for the other ADC Types
Best Answer
Here, it is only used for connections to power and ground.
I would guess, it is a low inductance connection with multiple wirebonds with the same effect as Litz wire. This is of great benefit to reduce ringing in pulsed lasers.
It is similar to a shielded signal but without a flat line below the circle.