H
Hammy
Guest
I'm using a THS4281 to make a general purpose High-Side current
sensor. I'm just building this on a small PCB so I can use it for
measurements. I've already successfully tested this circuit (see link
below) to measure capacitor charging pulses in a current source. The
resistor values aren't the actual values used, they will change based
on the circuit I'm using it in to measure.
http://i33.tinypic.com/6puk4l.png
Here is a schematic EDN on what I'm doing.
http://i37.tinypic.com/29ndu9s.png
My question is they show one opamp input biased at ˝ Vcc in the
THS4281. See this from the THS4281 data sheet.
http://i38.tinypic.com/s30cxy.png
Is this necessary the opamp is a RR in and out?
This is the layout not routed yet.
http://i37.tinypic.com/2rgyvza.png
J2 to J7 will have wires soldered so I can just plug it into a
breadboard or circuit for measuring.
Data sheet
http://focus.ti.com/lit/ds/symlink/ths4281.pdf
Thanks
sensor. I'm just building this on a small PCB so I can use it for
measurements. I've already successfully tested this circuit (see link
below) to measure capacitor charging pulses in a current source. The
resistor values aren't the actual values used, they will change based
on the circuit I'm using it in to measure.
http://i33.tinypic.com/6puk4l.png
Here is a schematic EDN on what I'm doing.
http://i37.tinypic.com/29ndu9s.png
My question is they show one opamp input biased at ˝ Vcc in the
THS4281. See this from the THS4281 data sheet.
http://i38.tinypic.com/s30cxy.png
Is this necessary the opamp is a RR in and out?
This is the layout not routed yet.
http://i37.tinypic.com/2rgyvza.png
J2 to J7 will have wires soldered so I can just plug it into a
breadboard or circuit for measuring.
Data sheet
http://focus.ti.com/lit/ds/symlink/ths4281.pdf
Thanks