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electret mic amplification using TL071 op amp
Hello everybody,I have a 2-wire electret microphone ( Panasonic wm-62 ), and I want to amplify the signal by about 100 or even 1000 ( the signal is a few mV ) and send the output to an ADC.I also have...
View ArticlePGA280 SPI timing.
Hi.I have been unable to find much information on the SPI timing of the PGA280. I have found only two statements in the datasheet. first is max SPIclk is 10MHz, and data is latched when SPI goes...
View ArticleINA826 destroyed with 30V Differential?
I hope someone can give me some idea of how I managed to destroy an INA826 with only a 30V differential (smoke came out). Even If I managed to short circuit something, the spec sheet seems to indicate...
View Articleis there a LMP2014MT spice model?
HiI Could not find a spice model for the LMP2014MT opamp. Is there a spice model for evaluation?ThanksJonathan
View ArticleI want to amplify a low frequency and low amplitude signal and am facing the...
I am currently working on a project which involves preamplification and filtering of EMG signals which are small in amplitude (MICRO TO FEW MILLIVOLTS) and are of very low frequency about 50-150Hz. I...
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100mV level shifting noise observed on INA126
The gain of the INA126 op amp is set to 460V/V and I am getting a 100mV noise on the output. Is this a common issue with the INA126 or is the gain so high that the noise is being amplified? In...
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Op Amp "Automotive Grade"
My next project is to develop a circuit for an automotive MAF sensor to sense mass airflow using RTD/Thermistors on a Wheatstone bridge, the voltage output from the bridge need to be amplified using an...
View ArticleACF2101 Switched Integrator, HOLD pin not functioning in TINA simulation
Hi there, I hope someone can help me. I'm running some simulations with TINA using the SPICE model for the ACF2101 switched Integrator from the TI website. So far I've been able to get the circuit to...
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AC amplification problem - coupling capacitor isn't blocking DC from electret...
Hello everyone,My circuit is the following simple electret mic + TL071 op amp:My goal is to amplify a signal from an electret microphone capsule and feed it into an ADC ( NI 6008 USB ). The bandwidth...
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INA333 problem. Output goes to zero when i bias input.
I hope you guys can help me with a problem.Please see attached picture of current test setup:I'm currently testing a INA333 working with single supply (+5VDC). I am using a voltage reference diode on...
View ArticleAmplifier parameters Bias current Offset current and Offset Voltage
What is the meaning of Bias current Offset current and Offset Voltage?How does the parameters impact application when using amplifier in Noninverting Operational amplifier and Inverting Operational...
View ArticleINA118 SNR Deterioration of the Instrumentation Amplifier
Hi,We have obtained one question from our customers.Our customers will use the INA118 as AD Driver for the ADS7263.Although we think that the SNR will change in relation to cut-off frequency, gain...
View Articlesuitable op-amp for right leg driver
Hi, I simulate an ECG machine it is work very well but whenI did it in real test it doesn't work very well i think my major problem is in right leg driver circuit. my schematic is like this picture but...
View ArticleADS1278EVM-PDK / ADC PRO
Duh question answers: Windows 7. Working internet connection. Have the EVM. Have downloaded software three times - adcpro-laucher-1.0.exe. We do not own a copy of labview. EVM is connected to...
View ArticleHow to select OP-AMP
In Texas website(http://www.ti.com/paramsearch/docs/parametricsearch.tsp?family=analog&familyId=1468&uiTemplateId=NODE_STRY_PGE_T)I saw few parameters used to categorize OP-AMP's like...
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How to change the low level voltage
Hi All,I have a square wave signal generated by the FPGA, which frequence is 500MHz,the High level is 3.3V and Low level is 0V.I want to change the Low Level voltage between 0V~3V without changing the...
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Oscillation on buffer output
Hello guys,I'm designing an analog circuit where I have only a single ended power supply but need to have symmetrical power for some Op. Amps. (LMP2234). To do so, I'm using a voltage reference of...
View ArticleXTR115, XTR116 capacitance on Vref and Vreg
I developed a sensor product using XTR116, several hundreds of which are operating in the field. However, we have had some reports of the output (4-20mA signal) inexplicably getting "stuck"....
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Counterfeit LM358A? Package does not match datasheet dimensions
I am doing a competitive analysis of a consumer phone accessory and came across an 8-pin leaded IC with the marking "32 TI, M6P". The Part Marking search...
View ArticleBig leakage current in INA226
Hi, I have a trouble about INA226 in my design.I used a lowside shunt resistor, and VIN+ was connected to power supply(3.32V) directly. A 6.8k resistor was connected between VIN- and ground.The...
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