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INA128: Questions about the Supply Range
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LM8261: How about the thetaJC
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OPA388: Voltage Noise @200kHz
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LF398-N: Negative ouput is limited
Part Number:LF398-N
Hello,
I supply the device with +15V at V+ and -15V at V-. When using the LF398N device (DIP package) an negative input of at least -10V is being hold at the output, whereas with the LF398M version (SOIC packages) the output is limited to approx. -0.7V. Am I missing something within the datasheet?
Regards
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INA333: Output Range is not as expected
Part Number:INA333
Hello,
I'm using an INA333 as a load cell amplifier and am not getting the results I expected. From some test measurements, the linear range I am getting is between 0.73 V and 1.85 V, and anything above or below just stays at those values. This is different than what was expected, which is 0.05 V to 3.1 V (see below).
I have the following parameters in my system:
Rg = 100 ohms, V+ = 3.3V, V- = 0V, Vcm = 1.65V, Vref = 0V
I've entered this all into the TI Instrumentation Amplifier Output Voltage vs Common Mode Voltage calculator and the result is below:
Can someone help explain why my output is getting limited? Is there something I'm doing wrong, or does the calculator not match reality for this amplifier?
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TLV521: Wonder the specific values of input resistance and capacitance (or impedance ) value of TLV 521
Part Number:TLV521
About a week ago, i asked a same question, but the answer was so ambiguous.
I'm so wonder the specific values of input resistance and capacitance (or impedance ) value of TLV 521.
Could give me more specific values than precious answer?
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XTR117: Spice models for XTR117
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INA128: Request for INA128
Part Number:INA128
Dear TI,
The INA128 is used to construct a differential amplifier circuit to measure the voltage between cells
1) INA128UA When the power supply voltage is ± 15V, please inquire whether the voltage of 15V or more can be output by differential in input
EX) + Input side: 20V, - Input side: If 15V is input, is it the part where 5V differential output can be checked?
2) INA128IA Power Supply Voltage is between -5V ~ 24V Is the above inquiry part measurable?
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INA217: Microphone Type
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INA217: INA217 for ECM and moving coil microphone?
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TLV521: Would like to know the measured value of input resistance and input capacitance of TLV521
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PGA280: PGA280, PGA281 DAISY CHAIN
Part Number:PGA280
HI?
Can I connect 12 PGA280s with same SPI channels through daisy chain configuration?
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INA118: simulation with ADS PROBLEM
Part Number:INA118
HELLO everyone,
i got a problem about the ADS simulation , i download a PSPICE MODEL of theINA118 from TI web, but when i simulate it there is an error, it write,
'' INA118,S11'' is an instance of undefined model 'spice_vswitch'
so have totally no idea!
if there any opinion that will be so helpful
thanks a lot !
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INA333: current sensing by using INA333 for battery operated device.
Part Number:INA333
Dear respected,
This is regarding INA333 in-Amp for using current measuement for battery operated device. Two connections from battery positive terminal connected VIN+ and VIN- of INA333 with 0.1Ohm resistor. See attached
image for reference. When I am not shorting System GND to INA GND , there is no change in output from INA>
When I am connecting System GND and INA GND , I can able to detect current sense. But ideally it has to work without connecting system GND and INA GNDs right????? as we are processing differential inputs
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LMP91000: Does it require a unit gain buffer from Vout to ADC.
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INA332: Layout
Part Number:INA332
Hi!
Need help in assessing the correctness of the layout of the circuit. All parts were calculated according to datasheet.
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XTR111: Layout questions
Part Number:XTR111
Hi!
Need help in assessing the correctness of the layout of the circuit. All part nominals are calculated according datasheet. Can you help me find mistakes in layout?
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OPA615: What is the advantage of using OPA615 as a peak detector?
Part Number:OPA615
For unipolar peak detection, a fast diode and a small capacitor can do what OPA615 does (see Figure 48 of the data sheets) except that OPA615 can hold the previous sample when the value is sampled by an ADC and the capacitor is discharging or resetting. A pre-OTA is still required for OPA615 input to accept signals form a photo diode. Are there any benefits to use an expensive OPA615? Many thanks.
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opa128: opa128 photodiode amplifier applications note circuit
Part Number:opa128
Hi,
This question relates to application note sboa061.pdf, "DESIGNING PHOTODIODE AMPLIFIER CIRCUITS WITH OPA128"
I'm interested to understand the bias part of the photodiode circuit, figure 4. There is an error in the circuit diagram I think - the bias supply for the photodiode is currently marked as ground. Presumably both the resistor and the 0.1uF capacitor are connected to the bias supply? It should be obvious but I can't quite see the function of the resistor and capacitor, so hesitate to guess (and wonder what value to use for the resistor).
Wouldn't the circuit still function if those components were omitted, and the photodiode connected directly to a bias supply, and also have less noise?
Thanks, Peter
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OPAMPEVM-SOT23: How to evaluate the actual accuracy of an ADC?
Part Number:OPAMPEVM-SOT23
I just have finished the design of ADS131a04. The general design is as follows:
I can use the dc source(Source Accuracy at 1mv) to evaluate the ADC. However, due to the signal source accuracy problem, I can't get the actual accuracy of ADC. just sotp at the mv level.
So tell me, what signal source do you use to evaluate ADC? please give me the definite element or equipment.
What device is used to measure buffer output? high precision multimeter? or oscilloscope?
Is there some complete test plan?
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