Part Number: LMP7721 Other Parts Discussed in Thread: INA128 , INA226 , TINA-TI Hello everyone! I have a big problem regarding my schematics...
To begin, I am trying to create a circuit that helps me measure the current on a Schottky diode that is polarized…
Part Number: LMP7721 Other Parts Discussed in Thread: TINA-TI Hello,
Was hoping to ask for some clarifications to section 7.3.7 Input Protection of the LMP7721 datasheet (p. 17). Specifically having troubles with comprehending the significance of the…
Part Number: LMP7721 Other Parts Discussed in Thread: TINA-TI Apologies in advance if these are mundane specs or queries… I have only briefly worked with ideal op-amp theory in the past (roughly 4+ years ago). If my following queries should be…
Part Number: LMP7721 Hi
I am using the LMP7721 as the input stage to a circuit used to measure electrostatic charge.
The amplifier is configured such that the Voltage Supply rails are +/- 2.5V
The remaining connections are thus;
Theory of operation is…
Part Number: LMP7721 Other Parts Discussed in Thread: TINA-TI Hi
I'd like to use the LMP7721 in a split supply configuration eg V = +2.5V and V- = -2.5V
Will this work ok and what negative impact on performance can I expect...?
Note - I tried using…
Part Number: LMP7721 Other Parts Discussed in Thread: OPA928 , OPA928EVM Hi,
I'm working on a sensor application using a photodiode connected to a transimpedance amplifier with a 5 Gigaohm feedback resistor.
Read Paul Grohe's 2011 series of articles…
Part Number: LMP7721 Hi all,
I would like to know the reason that solder mask should not cover the area inside of guard trace.
Is it a noise or leak current measures?
Best Regard,
Ryusuke.
Hi Ayodhya,
Ayodhya Weerakoon said: Recently I diagnosed that with the temperature of the IC the reading varies.
Can you give a number? Please specify how much the reading varies.
Is the voltage variation higher than the maximum temperature drift of LM4140…
There is no easy way to measure 1nA change with 250ohm TIA as this implies 250nV resolution - see below.
Changing the input current by 1nA from 1mA to 1.000,001mA would require resolution way below the input voltage noise of LMP7721. Simulating the input…
Part Number: LMP7721 Other Parts Discussed in Thread: TINA-TI , OPA210 , OPA928 , OPA928EVM Hello,
I am not an electrical engineer but a chemical one. Therefore, my question is probably foolish/basic.
I would like to build a circuit that is able to measure…