Dear Team,
We have selected the ADC ADS131M08 but we have certain requirement of ADC for signal conditioning i.e V - I converter. could you suggest whether XTR111 is compatible for our requirement or some other part number which we can consider for signal conditioning for ADC ?
our current requirement is 4 - 20mA.
Kindly check this and let me know.
Hoping to hear from you soon.
Thanks and Regards,
Prajwal Bhuse
design@avyannatech.com
Hi Prajwal,
I have answered your other post query regarding the I-V converter receiver side interfacing with the ADS131M08, where I suggested an op-amp with a shunt resistor, scaling the signal the 4-20mA input to 100mV to 3.2V in the range of the ADS131M08.
Is this question regarding the XTR111 V-I current transmitter?
The XTR111 can be used to produce an output current of 4-20mA.
For example, on the circuit below, the XTR111 powered with a supply larger than >+8V, RSET=2.49kΩ ,accepts a 0V-5V input voltage from a DAC and produces a 0mA to 20mA output:
Let me know if you have questions about the XTR111.
Thank you and Regards,
Luis
HI Prajwal,
The XTR111 current output transmitter can support a 4-20mA output signal while powered with a >8V supply.
Using the recommended configuration of the XTR111 datasheet Figure 36, with RSET = ~2.49kOhm, and a voltage divider as shown on data sheet Figure 43, p17 of the XTR111 data sheet, will provide the proper transfer function, supporting VIN=0 to +5V for a current Iout in the range of 4mA to 20mA:
In the simplified simulation below, the XTR111 regulator is configured to produce a +5V voltage. The 10kΩ-40kΩ voltage divider at the XTR111 input is referred to the +5V XTR111 regulator voltage. The XTR111 produces a current output Iout in the range of 4mA to 20mA, for an input voltage of 0V to +5V at the voltage divider input. See simplified simulation below:
TINA Simulation File:
Thank you and Regards,
Luis
