↧
AMC1301: can AMC1301 work with 5000kVrms for all time?
↧
OPA211: OPA211
Part Number:OPA211
Dear Team,
I ordered OPA211AIDR in this part marking is OPA211A but I receiving OPA211K.
What is the difference between marking the part of OPA211A and OPA211K.
Best regards,
Muthu
↧
↧
AMC1301: Isolated Current Sensing
Part Number:AMC1301
Hi all
Would you mind if we ask AMC1301?
In case of Isolated Voltage Sensing, we can understand that a series resistor is recommended to be used at the negative input (VINN) of the AMC1301 device with a value equal to the shunt resistor R3 (that is, R3' = R3 in Figure 52) to eliminate the effect of the bias current.
So, in case of Isolated Current Sensing, should sense resistance R3 value be equal to R3' value?
Or, the shunt resistance R3 is very small vaule, so it is not necessary to consider the bias current, right?
Kind regards
Hirotaka Matsumoto
↧
LM1815: Variable Reluctance Sensor for measuring Torque
Part Number:LM1815
Hi,
I would like to know if the LM1815 is suitable for my application. I want to interface it
to the output of a variable reluctance sensor for use in measuring torque.
The output of the sensor is non-sinusoidal with an output voltage which can vary between 0.75V to 12V peak to peak at a frequency of
approximately 40Khz. The spec for the sensor states that the load impedance should be at least 200k Ohm.
Any assistance in determining if the LM1815 will do the job for me would be much appreciated.
Thanks,
Eliot
↧
OPA2316: Landing Pad for RUG package
Part Number:OPA2316
Hi,
Do we have a landing pad recommendation for the OPA2316SIRUGR?
Customer needs it for their internal part creation process.
Thanks.
Best Regards,
Dunman Teo
↧
↧
XTR111: Rload be connected to a different GND than the GND of the XTR111, voltage drop if power supply connected to XTR111
Part Number:XTR111
Hello,
I have two questions concerning the XTR111 voltage to current converter:
1) Can Rload be connected to a different GND than the GND the XTR111 is connected to?
2) I used for both signal and power supply for the XTR111 a normal DC power supply which can be found in almost every laboratory of a university. I used a voltage divider to drop the input signal to approx. 4 V from 20 V. Rload (150 ohms) was connected to the same GND as the power supply. Rset was adjusted to 2500 ohms so that 5 V should deliver 20 mA. However, as soon as I connected the VSP to the 20 V, the DC power supply went from voltage mode with 20 V to current mode with 0.4 A and 1.7 V. Does anyone know what the reason might be? Might be the XTR111 faulty?
Thank you for your assistance in advance!
↧
AMC1301: Low pass filter
↧
INA116: INA116 Implementation
Part Number:INA116
Hello,
We are currently using an INA116 for a precision bio-medical measurement. The current prototype implementation is a dead bug and thus the general concerns about layout were avoided We are getting ready to fabricate an initial PCB and I have two questions.
1 - For our application we are measuring across a high-Z load but 10s of fA input bias up to possibly a 100s of fA or so would be tolerable. Is there a part anyone would recommend as a replacement?
2 - If we stick with the INA116 there is of course the guard ring guidance that mist be considered. We will have the amplifiers close to the point of measurement but reading the section on input connections I was looking at the coaxial configuration and wondered if the shields indicated in the top Fig. 5 (see below) are tied together at the source or if they are floating as seems to be indicated. The latter seems like it would be susceptible to EMI and such.
Thanks in advance for your consideration,
RW
↧
OPA2277: soldering profile
Part Number:OPA2277
Hi,
I need several solder profiles of your items, part name are OPA2277UA.
Would you send me its files? or tell me where can i find that.
best regards
cafain.
↧
↧
AMC1301: Input low pass filter 16kHz with Iib=0A condition
↧
INA188: Gain between 1X and 2X
Part Number:INA188
Hello,
The data sheet for the INA188 amplifier does not seem to give special attention to a gain factor of between 1X and 2X. (or I missed it)
i.e., if RG = 62.5K, gain is 1.8X. Is this a legal operating range for this device while still maintaining offset and gain drift specs?
I want to be comfortable with this gain range if I decide I need it. (a dc amp application)
regards,
Randy
↧
AMC1301: Datasheet Fig24 (page13)
Part Number:AMC1301
Hi,
I would like to ask you to confirm Fig24 (datasheet 13 page) as below.
I suppose that Voutp and Voutn seem to be opposite.
That is to say, Voutp(Black) means Voutn(Red) and Voupn(Red) means Voutp(Black).
We should exchange Voutp for Voutn at Fig24...
Is my idea correct?
Thank you for your advice.
Best Regards,
↧
LF398-N: Input offset problem
Part Number:LF398-N
I have been using the TI LF398-N in one of our products for many years with no problems, however our most recent production batch do not work correctly due to excessive input offset in all three LF398-Ns used in the circuit, normally there is less than 3mV difference between input and output, now there is about 15mV. The standard offset adjustment circuit described in the datasheet no longer fully zeros the offset, I changed resistor values to achieve zero offset, but then the offset varies with signal voltage. Swapping the ICs with some old ones from stock solves the problem, but I have no more in stock. I tried changing the LF398-Ns for the -AN version, but these seem to have the same problem, Is this a known issue? Is it just a bad batch of ICs that I got from RS components? I would appreciate any help or advice.
↧
↧
OPA2192: input common mode capacitors
↧
LMP7732: LMP7732 and Phase Reversal
Part Number:LMP7732
Hello, someone could tell me if the LMP3372 is immune to the output phase reversal when inputs are driven over the supply rail?
(Of course limiting the input current to less than 10mA)
↧
XTR111: XTR111 schematic
↧
LM139: Input Voltage Range
Part Number:LM139
The datasheet for this part states that the input common mode voltage can range from 0 V to VCC– 2 V. It also describes the outcomes of input voltage ranges that exceed this common mode range as follows:
• When IN– is higher than common mode and IN+ is within common mode, the output is low and the output transistor is sinking current
• When IN+ is higher than common mode and IN– is within common mode, the output is high impedance and the output transistor is not conducting
• When IN– and IN+ are both higher than common mode, the output is low and the output transistor is sinking current
Please confirm:
• whether this is guaranteed (or typical) operation of the device.
• my interpretation of the datasheet is that the device input voltage can exceed the supply rails. Is this correct? If so, please confirm what feature of this device makes in unique from other comparators that limit the input voltage to the supply rail.
• exceeding the common mode range of the device will not cause damage as long as the input voltage is within absolute maximum rating of -0.3 to 36V (stated in datasheet). If this is not the limit, please state the maximum input voltage that this device can withstand without damage.
• What is the maximum voltage rating for transient voltage <200us? Particularly, I am interested in the lower limit of –0.3V. Can this device withstand –1V for duration <200us without damage?
• please confirm that allowable input voltage range when the LM139 is supplied with +/-12V rails.
• do your responses above apply to device LM397?
↧
↧
XTR111: Problem with voltage output
Part Number:XTR111
Hi,
I'm working on a product that requires V/I outputs. To achieve this I'm basically using the configuration showed in Fig.48 on the datasheet but I'm finding that when I'm in "voltage mode" (sw1 is closed) I get an offset on the output... most of the range is an acceptable level (2-3mV), but on low voltages (0-1V) it's around 20-30mV which is too high for our specification.
What can be causing this? Are there any workarounds?
Regards,
Nate
↧
TLV2402: Output short circuit protection of amplifier
Part Number:TLV2402
Hi,
We are using a TLV2402IDR in a battery balance circuit and VCC is connected to +12V and GND is connected to ground in our setup. While testing the board, the amplifier was outputting +4V and when a tech probed the board to look at a signal, pin 8 (VCC) was shorted to pin 7 (OUT) momentarily. I could not specifically find a mention of output short circuit protection for this device, so I am not sure if the part was stressed at all. It appears to still be working fine, but we will replace it if there is any possibility of damage. I have read that other amplifiers have protections such that any short to a voltage between VCC and ground is OK, but if you exceed VCC or GND there may be damage.
Thanks for any information,
Gary Gravante
↧
OPA192: Can I use an OPA192 or an OPA2192 as a voltage follower?
Part Number:OPA192
I have a fluctuating DC signal of 7.7V which I need to be able to monitor on my small multimeter.
But unfortunately, the multimeter has a very low internal resistance of around 5k ohm, and the signal is a very weak one. So the 0.2mA drawn by the multimeter causes the signal voltage to drop to 1V.
I have to use this meter, as it is the only that will fit into my device, so I thought that maybe I could amplify the available current in the DC signal, while leaving the voltage unaffected, by using a voltage follower,
I already have an OPA192 and an OPA2192. Could one of these fit the bill, or I do I need to buy a different OP Amp? Could you please supply a voltage follower circuit that, when run off a 9V battery, will provide enough addtional current in my signal so that the meter reads the correct voltage? I have TNA -9 (basic) on my PC, so once I have the main layout, I could probably do the fine tuning myself.
↧