Rajesh,
Yes, OPA325 is specified for 5V single supply or dual +/-2.5V. However, since your application output requires only 0V to 3V range, there is no need for +/-5V supplies as shown above on my first reply schematic - only left side of R2 and R3 sees…
Both, CMOS and JFET input op amp may have input impedance in the range of 1Tohm but for the low voltage and RRIO CMOS would be the only choice. Please take a look at OPA328, OPA392, OPA391, OPA320, OPA325, OPA333 for 5V supply or LMP7701 (Vs up to 12V…
1. The TLV9051 has a worst-case offset voltage of 2 mV. You have to decide yourself if this is accurate enough for you.
2. The TLV9051 has rail-to-rail inputs, but the offset voltage becomes worse at about 1 V below the positive supply:
There are general…
Hi Nathan,
The OPA325 is a 10-MHz amplifier, rail-to-rail input/output amplifier that supports the extended common-mode to (V-) -0.1V.
It is available on the SOT-23 (DBV) package.
OPA325 CMRR range: (V-) - 0.1V < VCM < (V+) +0.1V over extended temperature…
Oh! My bad!
I discover Rail-to-Rail of OPA172 only guarantee output instead of both input and output.
So I'd not adopt OPA172.
The reason for selecting OPA172 is also because of the cost.
But for the cost reason, I think OPA325 is a good choice, because…
Hello Peter,
Thanks for the detailed explanation.
So I have modified the circuit, I will also replace the OPA320 with an OPA325 since my supplier does not have stock.
Ivan.
Hi Brendan,
There are a few things I notice about this circuit. Let's start with your input stage...
It looks like you are trying to measure a 0V input with the OPA325. I cannot see the negative supply because of the label but your positive supply…
Part Number: INA199 Other Parts Discussed in Thread: OPA325 Hi Team,
Can you please help check the circuit below?
The circuit uses INA199A1DCKR to monitor the current charging for a battery. But the issue is that the raw ADC reading was very noisy and…
1. You have to look at the test conditions. For te OPA344, the offset voltage is specified for a single input voltage, V S /2.
2. Rail-to-rail inputs need two transistors to cover the entire range, and thus always have a transition region. The exception…
Part Number: INA2331 Other Parts Discussed in Thread: INA331 , TINA-TI , LM27762 , AFE5816 , OPA325 Hi
I'm implementing below circuitry for amplifier section. The input signal voltage will range between 10uV to 10mV. But in the current circuit, the offset…
