Other Parts Discussed in Thread: TLC27L2, TLC27L1, TLV27L1
Hello,
I am looking for a General purpose opamp with with input common mode voltage extending below ground or negative supply.
Following are brief requirements:
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Hello,
I am looking for a General purpose opamp with with input common mode voltage extending below ground or negative supply.
Following are brief requirements:
Hi Ron,
Thank you for suggesting TLC27L2. The C and I suffix parts appear to satisfy my requirement.
Even though the data sheet tables specify characteristics up to Vdd = 10V, I assume I can use it at Vdd = 15V where the common mode input range would be -0.2V to (15V-1.5V) = 13.5V. Is that assumption correct?
Finally, does TI also have an opamp part similar to this with just a single opamp in one package?
Kind regards,
Nitish Agrawal
Nitish,
The minimum linear range of the input common-mode voltage range of TLC27L1 is specified from 200mV below negative rail to 1V below positive rail. Thus for your -4V to 12V supplies, this means the valid input voltage range is from -4.2V to 11V.
Hi Nitish,
this does only mean that you can give 0V to the one input and 14V to the other input without damaging the chip. But applying -2V directly to the input will damage the chip.
Kai