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art Number: TLV4170
Hi,
We are using the TLV4170 for active clamping of the signals in our prototypes PCB. We found that there was drop after the 100 ohm marked in the attached schematic pic. If the active clamping is removed, then the voltage drop is not happening.
We found that almost 300uA is consumed by the active clamping inputs of TLV4170. It shouldn't consume this much as per our understanding. Please help us understand where we are going wrong.
Thanks,
Aditya Teja
Hello Aditya,
The TLV4170 has input to input diodes. The 2.5V signal is more than one diode drop from U1 and U2 other input voltages of 0V and 3V. Therefore U1 will take current from the input 2.5V. U1 also take current from U2. This circuit requires an op amp that does not have input to input diodes. See figure 27 in the data sheet.
