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ADS1291 EMG circuit design help
Hi allI have some confusion designing EMG circuit with ADS1291. Please share your valuable opinions.Application: EMG measuring with 2 electrodesChip: ADS1291Analog power: +1.5~-1.5V(bipolar power...
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Register configuration examples for ADS1298R
Hello,I am using the ADS1298R for a 12-lead ECG application and am having a hard time finding examples of how to configure the devise registers over SPI.For example:I have the leads configured as...
View ArticlepH measurement with TI's INA116
I am trying to implement a pH measuring device with INA116 chip. One of the applications of the chip is pH measurement.Constrants: pH ranges from +- 430 mV. Max input/output 2 Hz frequency. Gain of...
View ArticleXTR300 value of RGAIN
Dear CommunityWe use the XTR300 as Voltage or Current Output Driver (+/-10V or +/-20mA) in a Standard configuration (Rset = 2k, Ros = 2k, Rgain = 10k).Because of some heat Problems, I'm trying to...
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Op-Amp for voltage scaling
Hi all,Samsung would like to scale output voltage of battery of Note PC. since output voltage of battery may put into microcontroller, scaling voltage should be under 3.3V.the output voltage range...
View ArticleECG Amplifier using INA321 and OPA336
I am trying to make a simple ECG amplifier using INA 321 and OPA 336. I am driving this amplifier using a an ECG simulator(http://www.heinstruments.com/ecg-simulator.htm), hence I do not have a right...
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ISO124 ; 0.010% max NONLINEARITY
Hi,I'd like to have further details regarding the 0.01% FSR max nonlinearirty of the ISO124.How to assess it ? What does it represent ?Thanks in advance.Paulo.
View Articlewhy pga309evm can not work after calibration with real sensor?
1.why pga309evm can not work after calibration with real sensor? i do step by step according guider.2.when i check the test pin indicate pull down the test pin or pull up ?
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I2C command of OPT3001 [urgent]
Dears,Is there any sample code of OPT3001?My customer test OPT3001 EVM and would like to implement OPT3001 on their system.However, there is something wrong with the I2C read/write command.They cannot...
View ArticleLMP91000 -- has anybody used this chip with a 4-terminal eletrochemical cell?
Hello, The LMP91000 is a nice chip (and even has internal temp sensor which is very handy for EC cells) but it's designed for 3-terminal EC cells. However, our application requires more precise...
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digitizing analog 100mV p-p signal
HiI am trying to apply zero crossing detector using lm211.this is my signal but I cant get this circuit to do what I want.I connected emiter out, in- and vcc- to gnd. in+ to the signal below....
View ArticleNeed low cost replacement circuit for XTR101
Hello TI,We are using XTR101 chip for RTD to 4-20mA current conversion. We are almost using 1k+ volume per month & we have 5k stock. The cost of the chip we are getting around 560 Indian rupees for...
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INA128 output problem
Hi,I want to use an INA128 to amplify signals from a pressure sensor in the signal range +/-50mV to an output of +-10V. I have built a circuit according to the design in the data sheet using +/-15V...
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power supply low noise amplifier
Hi all,I am currently developing an amplifying chain with 90dB gain because the input signal is some microvolt and the desire bandwidth is from 20kHz to 200kHz. To do this I have designed a chain of 4...
View ArticleMinimum TIA gain on LMP91000
Hello,Is there a minimum external resistance for the LMP91000 TIA gain? I would like to use a 10 ohm external resistor with no internal resistor in parallel. I wasn't sure that would be too low of a...
View ArticleWriting to PGA117
Hello,On page 27 of the PGA117 family datasheet, it has SPI commands for the PGA112/113 and also daisy-chain commands but I don't see where it specifically states what commands I would use for the...
View ArticleOperating Temperature Range of INA197AIDBVT
As per the data sheet, it is provided that the operating temperature range is -55 to 150 and storage temp range is -65 to 150.But in the website, it is mentioned that operating temperature is -40 to...
View ArticlePGA117: How to verify SPI sent correctly?
Hello,I currently am trying to write to the PGA 0x2a and 0x09 (mux CH9 with gain 1). Here is the scope snapshot of what I am sending to the PGA: http://imgur.com/rZo8slL.However, I am unable to get...
View ArticleTLV2374 absolute maximum rating voltage of output?
Hi, TIersHow much voltage TLV2374 could accept on output pin?Thanks and best regards.
View ArticlePGA309 question of EVM
Dear allOur customer have some question about EVM.Please see attached file.Regards,PAN-M(Please visit the site to view this file)
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