No. But the XTR111 can do.

Kai

Hi,

of course can the XTR300 source and sink current at the output. Why not looking at figures 3 and 42 of datasheet? With Rset = Ros = 2k the output of XTR300 can source 20mA and sink -20mA.

M SANDEEP said:

Based on my application, i want 0-20mA output with Sourcing and Sinking power supply.

What do you mean by "sourcing and sinking power supply"??

Kai

As per my requirement...

Sourcing means Generating 0-20mA output with supply at Transmitter side

Sinking means Generating 0-20mA output with supply at Receiver side.

It means Current transmitter can work with both sourcing and sinking supply.

Otherwise if you have any reference document related to 0-20mA current transmitter with Source and sink outputs...pls share

You mean that it can work as 2-wire and 3-wire current transmitter, as explained by Luis?

As the frontpage of datasheet of XTR300 clearly says, the XTR300 can only work as 3-wire current transmitter.

It's impossibe for a 2-wire current transmitter to work from 0mA to 20mA, because the electronic circuitry of current transmitter always consumes some supply current (<4mA).

Please carefully work through the links given by Luis.

Kai

ok i understood..

It means any 3-wire transmitter doesn't work for sinking output with external supply.

Sandeep.,

The XTR111, XTR300 and XTR305 are 3-wire current transmitters, they need to be powered with an external supply outside the current loop.

As I have explained above, these devices can not be used on a 2-wire current transmitter application.

The XTR111 is a 3-wire transmitter that can only source output current.

The XTR300 and XTR305 can either source or sink current, or provide a positive/negative output as documented both on the XTR300 and XTR305 datasheet or TIPD155:

The standard circuit for current output mode on figure 3 of the datasheet shows the transfer function for the XTR300 and XTR305, where the current output is a function of the input voltage.

Thank you and Regards,

Luis

Hi sir.

 I have accidentally  pressed "Resolved" button. But i have still queries regarding this thread.

Hi,

many manufacturers have their own spellings when it comes to "2-wire" and "3-wire" sensors. This is not helpful because this results in lots of confusion. I would recommend to stay with the "2-wire" and "3-wire" spelling.

The words "2-wire" and "3-wire" only make sense when you think of a "naked" sensor outputting a signal current to a receiver. "Naked" means that it does not have an own supply voltage but needs a supply voltage from the receiver.

Then, "3-wire" means that the sensor outputs a signal current over two lines, the signal line and the ground return line and that it needs an additional supply voltage coming over a third line. The ground return line of the signal line is also used as the ground return line for the supply voltage. By this methode signal currents down to 0mA can be generated.

"2-wire" means that the sensor gets a supply voltage over one line and outputs the signal current over a second line. There's no ground return current. The ground reference is only formed in the receiver. Because of that only two wires are used. But because the current transmitter in the sensor needs some supply current and supply voltage to work, only signal currents of more than 4mA can be generated. Even if the current transmitter circuitry would need less than 4mA, then the current transmitter always forces a current of 4mA to flow. This is accomplished by using a very clever method where the input circuitry of current transmitter floats relative to the loop power supply and the ground reference of the receiver.

it's very unusual that a sensor provides two outputs, a "3-wire" and "2-wire". A usual sensor is either "2-wire", if it is loop powered (by a supply voltage provided from the receiver) or it is "3-wire", if the sensor needs an additional supply voltage with an additional ground return current path.

It's the job ot the receiver to allow both kinds of sensors to be connected. So the receiver must allow "2-wire" and "3-wire" but the sensor is only "2-wire" or "3-wire".

So what exactly are your needs?

Must you build a "naked sensor" outputting a signal current? Or must you build a "circuit" outputting a signal current?

Next question: Must the "naked sensor" or the "circuit" get power from the receiver?

Next question: Must you be able to output "0...20mA" and "4...20mA" because the receiver is not able to switch between these two ranges? Or what else is the reason why you must output both ranges?

Kai

Hi sir,

kai klaas69 said:

So exactly what are your needs?

I want 0-20mA output only...i want to send 0-20mA current to receiver with Active/Passive configuration.

based on the receiver requirement they will connect to active/passive configuration as per the previous shared image.

i will provide jumpers at transmitter side to shift b/w Active/passive configuration

kai klaas69 said:

Must you build a "naked sensor" outputting a signal current? Or must you build a "circuit" outputting a signal current?

i'm building circuit to generate current.

kai klaas69 said:

Next question: Must the "naked sensor" or the "circuit" get power from the receiver?

Use of the Receiver side and transmitter side supply.. via jumpers we will shift supply option.

kai klaas69 said:

Next question: Must you be able to output "0...20mA" and "4...20mA" because the receiver is not able to switch between these two ranges? Or what else is the reason why you must output both ranges?

No. i'm able to generate 0-20mA only. but i want to generate in this configuration

Hi,

so you want to make your circuit work with receivers which only have two terminals and which either have "I" and "GNA" terminals or "AUX" and "I" terminals? Or by other words, a receiver which supports "passive current" does not support "active current" and vice versa?

In this case both methods are incompatible and you cannot switch from the one method to the other by simple jumpers.

If the "passive current" method would provide a third terminal for the ground return current (Rload-), you could drive it like the "active current" method.

Kai

Yes sir....

But I simulated the active and passive configuration with single XTR117 device in Tina software...

Sandeep,

The XTR117 (2-wire current transmitter) will not work on the 0-20mA current output application.

The XTR117 current transmitter and sensor circuitry consumes an amount of quiescent current; therefore, the 2-wire transmitter will not be able to reach 0mA at the zero-scale input level.  On a 2-wire current transmitter application, the minimum zero-scale scale needs to be set above the overall transmitter circuit current consumption.  This includes the current consumption of the XTR117, sensor, and any circuitry connected to the current loop.  The quiescent current consumption of the XTR117 stand-alone can be as high as 200µA, plus you will need to account for additional current consumed by the sensor or current transmitter circuitry.

Currently, there is no XTR117 TINA or XTR117 PSPICE model.  The XTR117 was released to market about 17-years ago, and no model was released with the product at the time.   A simplified XTR117 TINA simulation file has been shared by engineers on E2E forums.  This TINA file emulates the idealized current output transfer function of the XTR117.  The TINA file circuit is built using ideal components, and it is helpful as a tool to verify the XTR115/6/7 RIN resistor selection, to check the overall current output transfer function when using the device on the recommended 2-wire 4-20mA application. Keep in mind, this XTR117 simplified simulation does not model the XTR117 quiescent current consumption, offset, AC frequency response, supply headroom limitations or dynamic behavior of the XTR117. The simulation is not a replacement for the device datasheet, application notes, tutorials or documentation that has been provided above.

Your “passive” configuration above is only compatible with the XTR117 (2-wire) on a 4mA - 20mA output application, but as I have explained, it will not work on a 0mA to 20mA application. 

The XTR111 could be used on the “passive current” configuration if a third wire connection was available to connect to the GND of the XTR transmitter to the Rload (-) connection, making it a 3-wire configuration. For Clarification (7-19-22), the XTR300/XTR305 are 3-wire current transmitters, but please keep in mind, the XTR300 and XTR305 also require to be powered by bipolar+/- supplies, and therefore will not work in the "passive current" configuration without the additional Rload(-) to XTR ground connection, and without an additional negative  -VEE supply.)

I hope this helps,

Regards,

Luis

Ok sir...
I understood... i shared the tina file of XTR117. In this i simulated the both Active & Passive configuration for 4-20mA output... Can you please verify once.. Is this design is ok for 4-20mA output in both active & passive configuration...

XTR117_04.07.22.TSC

Based on SW-SPDT1 & SW-SPDT2 switch positions i simulated the active & Passive current outputs...

I asked you:

kai klaas69 said:

Next question: Must you be able to output "0...20mA" and "4...20mA" because the receiver is not able to switch between these two ranges? Or what else is the reason why you must output both ranges?

And you answered:

M SANDEEP said:

No. i'm able to generate 0-20mA only.

So you don't plan any longer to generate 0-20mA but want now to generate 4-20mA?

Kai

Sorry sir...

I'm asking for verifying the Active & Passive configuration... That's why i simulated and shared the XTR117 design to do verification of concept is working or not. 

Present, based on all your suggestions and references i am going with 3-wire transmitter for generating 0-20mA output in both active & passive modes...

So, now i am sharing the simulation and results files to verify the circuit function....Please go through once is this circuit will work or not

1401.XTR110.TSC

And One more thing Presently XTR110KP (Through hole) Part number is available in stock but SMD part (XTR110KU) is not available...

And also 3-wire XTR family devices are not available in stock. Can you please provide the stock information or can you please suggest stock available part number for 3-wire current transmitter..

Luis Chioye said:

Regarding the XTR110 (3-wire) circuit, ensure that the transmitter XTR110 GND potential is the same as the receiver GND potential. Please add a third wire connecting the receiver and transmitter grounds together. This GND connection is also required if you select the XTR111 (3-wire) transmitter. Please also add a local supply bypass capacitor in close proximity to the XTR device. 

Yes sir i'll add.. is this connection only for simulation point-off view, bcz in schematic & layout point of view from board connector onwards all ground connections are shorted bcz i'm using only single GND notation.

So, As per your explanation i can use above 3-Wire circuit model for both Active & passive configuration with XTR111 device...

Luis Chioye said:

If you require notifications when a out of stock device becomes available, please navigate to 'Ordering & quality' and click on 'Notify me when available'.

Thank you for your suggestion to select device. but in my website it shows XTR111 VSON (DRC) package is in Out of Stock...

HI Sandeep,

Unfortunately, I don't have additional information about device availability.  I am part of the applications team, providing technical support but I don't have further visibility on device inventories.  If the device you require is out of stock, you may request to be notified when devices become available.  

Thank you and Regards,

Luis

Hi Sir,

We designed and Simulated the 0-20mA current transmission using XTR111 and Verified the Results also...

But Unavailability of XTR111AIDRCR stock.. Alternatively i have designed 3-Wire 0-20mA Transmitter using Full Discrete model as per TIPD102 Ref document..

So, As per the below attachment of the discrete design, can you please verify once and let me know if any modifications and give me the confirmation to go with production of this design..

And also verify the simulated graphs in Tina..

0-5V_to_0-20mA Discrete design.22.07.22.TSC

OK thank you sir...

HI Sandeep,

Thank you, let me know if you require further assistance.

Kind Regards,

Luis

Hi Sir,

We designed and Simulated the 0-20mA current transmission using XTR111 and Verified the Results also...This circuit we are placing as a Alternate circuit for V-I Converter discrete design (Discussed in previous message).

1) So can you please verify the attached Tina simulation file of XTR111 to generate the 0-20mA output with 0-5V input and Supply voltage is +12V. 

XTR111_0-5V_to_4-20mA & 0-20mA.21.07.22.TSC

And also we are going to use the DAC (DAC128S085) for generating the Voltage output to Current transmitters(0-20mA) & voltage transmitter (0-10V & ±10V)

2) In the XTR111 circuit we used Rin-10kohm. So can you please verify this also, if any requirement to change this Rin resistance as per the DAC128S085 output.

3) And i'm attaching one more design for generating the 0-10V & ±10V output using Opamp-TLV172. Can you please verify the simulation and let me know if any modifications to be done.

0-10V & ±10V_Opmap.22.07.22_1.TSC

4)

Luis Chioye said:

The design will work with the OPA2192 or the OPA2197

As per your suggestion we are using the OPA2197 for 0-20mA discrete design but OPA2197 & OPA2192 stock is not available.. can we use TLV2172 in place of OPA197 or OPA192..other wise shall we find similar specification of OPA192.