Part Number: OPA140 Other Parts Discussed in Thread: TINA-TI , , LMH6645 Hello everyone,
I need help to calculate the gain of the amplifier circuit below.
Thanks,
Hai
Hi Fazlul,
I don't specifically cover the LMH6645, but can make some general comments regarding your application:
The current accuracy of the Improved Howland Current Pump is directly affected by the exactness of component values and amplifier errors…
Other Parts Discussed in Thread: OPA835 , OPA836 , OPA2889 , THS4281 , OPA890 , LMH6618 , LMH6645 , OPA683 , LMH6723 , OPA684 do you have suggestion part to replace LT6233-10?
Hello Jay,
The LMV116 is an enhanced slew rate version of the LMH6645. The high speed LMH devices are very sensitive to output capacitance (normally they drive back-terminated loads) and normally start oscillating with direct capacitive loads as low…
Hi Marceli,
the output current of XTR111 must be limited to less than 50mA or you risk that the XTR111 becomes damaged. The XTR111 is not designed to output a current of 100mA.
I would think about using the improved Howland current pump:
3835.snoa474a…
Part Number: OPA547 Other Parts Discussed in Thread: TINA-TI Team,
We are using the OPA547 for an "improved Howland current pump" to turn voltage to a 0–20 mA output.
It works ok until a given input voltage level. When this input voltage is reached…
Hi Faisal,
A complete discussion of the Improved Howland Current Pump is covered in TI Application Report, SNOA474 (AN-1515), A Comprehensive Study of the Howland Current Pump. That should answer most any question you may have about the fundamentals…
