Part Number: JFE2140 Other Parts Discussed in Thread: , OPA202 , OPA145 Hi,
Is the offset correction integrator circuit (U3 & surrounding) in the JFE2140EVM actually tested working?
https://www.ti.com/lit/ug/slpu010/slpu010.pdf
I've run a simulation…
Part Number: JFE2140 Other Parts Discussed in Thread: TINA-TI 原理图如下，和JFE2140EVM不同之处，R204,R205 3K 1%， R210 8.2K 1%，R208 1K 1%, 目前实际贴的电阻都为1%，
不接输入/接GND的情况下，会输出如下波形： 但通过Tina-TI仿真是正常的，暂时找不到哪里问题，请帮指导调试方向
Hi Nir,
We have an EVM for the OPA928 that can be found here:
https://www.ti.com/tool/OPA928EVM
I have several app notes on circuits that use discrete JFET devices that you may consider. I have an EVM that goes along with both the JFE150 and JFE2140…
Hi Dimitri,
The current noise density is frequency dependent but remains flat in the broadband region as shown below. The noise can be measured using the JFE150 or JFE2140 EVMs that I designed. I wrote two app notes that cover the operation of each…
Part Number: OPA1656 Other Parts Discussed in Thread: JFE2140 , , OPA202 , INA849 , JFE150EVM , JFE2140EVM , JFE150 , OPA145 Hi,
I want to know the proper configuration to connect a low-frequency antenna (L = 12mH @ Rdc = 7.5Ω @ Cp = ~ 60pF) to an opa1656…
Hi Sumeet,
My recommendation would be to significantly reduce the complexity of the circuit first for debug. All DC voltages within the circuit should be analyzed and valid before noise or AC analysis can be performed. There are a few issues with this…
Other Parts Discussed in Thread: PGA2505 , PCM4204 , JFE150 , JFE2140 , JFE2140EVM , OPA1671 , OPA1678 , INA163 I'm designing a preamplifier for a GRAS 47AC microphone. It is a Pre-polarized 1/2" CCP mic with a frequency range from .09 to 20kHz. Does…
Hey Andrew,
The OPA1642 has much lower current noise and better 1/f noise than the OPA1656. For high source impedance sensors such as a phono cartridge lower current noise is better. The current noise paired with high source impedance translates into…
