Part Number: LMP7721 Other Parts Discussed in Thread: LMP7717 What is the Current sensing Range of LMP7721?
Because I want to measure the current range from 0.5na to 100ua so using this LMP7721 ic as Trans impedance amplifier is able to measure this…
Part Number: LMP7721 Other Parts Discussed in Thread: INA321 , TINA-TI Hi,
I made a two-stage trans-impedance amplifier using a LMP7721.
The schematic is below.
which is same to
The operating point of negative input node of LMP7721 was 1.5…
As Michael indicated, you must lift the output at least 100mV above the ground into LMP7721 output voltage linear range - this may be easily accomplished using R2/R3 voltage divider as shown below. Running a small-signal transient analysis confirms stability…
Part Number: LMP7721 Hi all: I have found another phenomenon by Oscilloscope on vout (LMP7721's PIN4) as following ,there is no input on PH+.
Would you please tell me why? how to resolved it ? And the frequency is 50HZ. Probe.pdf
Since the IB in LMP7721 is caused by the reverse-bias leakage of the ESD protection diode, it's magnitude goes down at low temperature. However, you may NOT operate the part at -100C because its absolute minimum rated temperature (storage) is at -65C…
Part Number: LMP7721 Dear All:
The attachment is my circuit.
Now ,when I debug the board.
The Volatge of PH- is 1.65V(3.3V/2),But the PIN4 Vout of the LMP7221 is 1.2V,What's cause the difference ?
I can not find the problem, the voltage should…
Part Number: LMP7721 HI,
We are designing a differential pulse stripping voltammetry, in that we are using LMP7721 as a trans-impedance amplifier we have gone through the datasheet but unable to find the current requirement level of that IC.
we like…
Part Number: LMP7721 Also very low bias current.
Goal to measure voltage across a sensing capacitor, displacement of charge.
1 pA bias current or less
Cin 1 pF differential
very low noise
We wish to use this methodology to reduce the…
Part Number: LMP7721 Other Parts Discussed in Thread: LMC6062 , OPA391 Hello,
I am designing isolated loop powered pH measurement circuit, as I read through LMP7721 datasheet, its excellent bias current makes perfect for pH measurement.
However, LMP7721…
