Part Number: We are developing a wearable device where we need two independent wheatstone bridge strain gauge circuits - one to measure skin resistance (average 0.5K ohms resistance) and other to have a strain gauge sensor (120 ohms). We need a low power…
Hi Hari,
the TINA-TI DC analysis shows VF2 = 3.998994V and VF3 = 3.99899V. VF2 - VF3 = 4µV.
This error voltage is the sum of the finite CMRR, the input offset voltage and the open loop gain of LPV812. Have a look at this very simplified calculation…
Part Number: LPV542 Other Parts Discussed in Thread: LPV521 , TLV8802 , TLV8542 , LPV812 , TLV8812 , LPV821 , Is there detailed information anywhere about the input offset voltage for this opamp? Perhaps some graphs, similar to the graphs (figures 3-22) in the…
Hello Kai,
Please check the following nanpower dual channel devices; LPV542, LPV802, LPV812, TLV8802 and TLV522.
For a complete list of TI's nanpower opamps please check the link below.
www.ti.com/.../ultra-low-power-op-amps-overview.page
Regards…
Alessio,
I checked the data sheet for low current duals (in order) LPV802, LPV812, TLV8542, TLV8802, TLV8812, TLV522 , LPV542, TLV2402 OPA2369, LMC6442, TLV2369, and OPA2349. You can check higher ICC devices yourself if you like, but suspect over 30 will…