JFET quad op-amp for high-impedance signal chains
The Texas Instruments TL084HIPWR is a JFET-input quad operational amplifier in a 14-TSSOP surface-mount package.
Supply range and quiescent budget
Operates from a single supply as low as 4.5 V up to 40 V, or from split rails. Total supply current is 937.5 µA for all four channels — roughly 234 µA per amplifier — which keeps the thermal rise low in the TSSOP package.
Input characteristics for sensor front-ends
The JFET input stage delivers 1 pA typical input bias current and 1 mV typical input offset voltage. This combination suits high-impedance sources such as photodiode amplifiers, pH probes, and piezoelectric sensors where bias current errors would otherwise dominate.
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