Difference Between OPA2228U and OPA2228UA
Hi, Can anybody tell me the difference between the OPA2228U and OPA2228UA Precision Amplifiers. The only difference I can see is cost, which is substantial. Thank you.Glen
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XTR116 and PIC16F877 PWM Connection
Hi Everyone,I did the conversion 0-5V 4-20ma convert with XTR 116. Circuit schema like in the photo. I want to use PIC16F877 instead of potentiometers. Using PWM want to get to 4-20. But I don't know...
View ArticleLM2901/LM2903 - Input voltage in case of no VCC
Hello all,Would you mind if we confirm LM2901/LM2903? In case of no VCC LM2901/LM2903(power off), if the input+, - was added voltage the device will be broken?As our recognition, it is OK wihthin...
View Article1mv to 60mv gas sensor ADC suggestion required i2c preferred
Thank you in advance,I am looking for a suitable adc with a pga capable of reading a gas sensor that give a 0-60mv range and I need two decimal places so I need 14bit (enob)? to give a 0.01 step in...
View ArticleOPA140 LTSpice Simulation Problem
Hi,I'm trying a Analog Signal Filtering with OPA140 but ı think ı have a problem with OPA140 spice model. Becasue ı tried but simulation doesn't start. LTSpice try Damped-Psuedo Analysis and after this...
View Article2 Lead dry electrode ECG circuit
Hello TI,I need a circuit design for a 2 Lead Dry contact electrode ECG system. I am selecting INAMP & OPAMP for the design. Please suggest me a very good working circuit & IC'S. Please I am...
View ArticleLM2901D negative voltage on the input
I have a design which utilizes the LM2901D voltage comparator. There are conditions where the one input may go more negative than the GND pin. Will this damage the part if the input current is limited?
View ArticleINA121 Parameter drift over Operating Temperature Range
Hi,I wanted to use INA121 for an application where ambient will be from -55 to 95degC. Gain setting will be 1. As per page-2 of datasheet the max gain error for INA121U is 0.05% at 25degC. Gain vs...
View ArticleLMV792 for Arc detection(RD-195)
HiOur customer are going to evaluate RD-195 which is arc detection reference board.There is a test circuit on the board. What do this circuit generate?I understand this circuit generate a just simple...
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Reading 4-20mA Sensors
Hi,I need to read 6 x 4-20mA sensors. My current design utilize Instrumentation Amplifier TI INA332 and RC filter to eliminate the digital HART signal that is coming from the sensors and TI ADS1115 16...
View ArticleBUF08821 - programmed output voltage setting when Vs turned ON->OFF->ON
Hi Team,Could you please tell me about the gamma buffer BUF08821 ?Our customer will use this device in the following sequence.1) Power up Vsd (power for digital circuit)2) Power up Vs (power for analog...
View ArticleRecording Plant bio-signals
Hello,we are working in a project to record plant electrical activity e.g. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC158572/ Ideally, this should be similar to ECG, provided that the...
View ArticleLooking for a High capacitance, Low Vos, Rail-Rail, +/-15v OP-amp
I have a need to drive a low frequency (<1MHz) analog signal over about 6 feet of cable so I am looking for a suitable solution. The parameters that I have been focusing on, and appear to be...
View ArticleLMP8603-Q1 Total Gain Error and Input Offset Voltage
Hello, Please answer question about Total Gain Error and Input Offset Voltage. Total Gain Error(9.95V min/ 10.5V max) and Input Offset Voltage(+-1mV max) are specified under V S = 5V, −22V ≤ V CM ≤ 60V...
View ArticleXTR108EVM-USB how to set OS/US Limiting
Hi,My customer is testing the XTR108EVM-USB.They want to change OS/US Limiting as Tutorial on P32.http://www.tij.co.jp/jp/lit/ug/sbou123/sbou123.pdfThey changed OS/US Limiting into "enable", although...
View ArticleLM319 - Input voltage range
Hello all,Would you mind if we ask LM319?<Question1>In case of V+=5V, V-=0V, the data sheet shows that Input Votage Range is Min=1V, Max=3V.If input volage will be less than 1V or over than 3V,...
View ArticleREF3133AIDBZT Baking Coefficient
Hello, If customer go PCB SMD process with REF3133AIDBZT, they would like to baking them before that. Do we have any baking coefficient and doc to provide? Thanks.BRPatrick
View ArticlePGA309 Failure issues
Hello, When using the PGA309 in a pressure sensor application we installed a pressure sensor on a compressor and after 4 hours it quit working voltage went to 55mV read EEPROM and found Ti...
View Articletlv2372 protection
Is thereanapplication note which show how to protect the OP when 5Vsupply and where the output is short circuited against +33V.
View ArticleTINA/SPICE-Model OPA211 warning
Hi,I imported the OPA211-SPICE-Model http://www.ti.com/lit/zip/sbom307. The model works fine. However, I got a warning "Pin U1.4 of NMOS Enhancement-type U1.M55 is not connected". Same behavior with...
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