Part Number: LM234 Other Parts Discussed in Thread: LM334 , TL431LI , LM4041-N Hello guys,
I am using LM234Z-3 in my current design with the intention to give me either 1mA (Rset = 68Ohm) or 2mA (Rset = 34Ohm) constant current for my load that can be in…
Part Number: LM234 Customer used AD592 for temp sensing. Now I tried to promote LM234, but it seems that we need one extra resistor. Is there any other suggested device?
Part Number: LM234 The LM234 is specified to operate for currents between 1 uA and 10 mA. The "Ratio of I_set to I_bias" plot is critical to selecting the correct resistance for R_set, which is used to set the reference current. However, that…
Part Number: LM234 Hello,
I'm using current source LM234 chip to output constant 1mA current, the load vary from 1K to 30K. The V+ of LM234 is provide by +32V from DCDC.
The output of LM234 can only drive the load below 15K, when the load above 15K…
Other Parts Discussed in Thread: LM124 , LM234 Dear TI Specialist and Forum´s members
In remote country (as Brazil) we are at bay to design circuits as components are not on one´s reach
I go to design a current source 1 mA and 2 mA for medical…
Hi Jeferson,
Mike is out until Monday. I have reviewed this and in general, I understand what you are trying to do. There is a spreadsheet that you can use to recheck your earlier calculations at
https://www.ti.com/lit/zip/sluc175
I do not understand…
Other Parts Discussed in Thread: LM334 We are using LM334 as a current source in one of bio-medical product. LM334 is followed by 4 stages of OP-AMP, ADC and uC. ( Input to OP-AMP is in uV range and current from LM334 is 3.3uA)
I have gone through LM334…
Other Parts Discussed in Thread: LM234 Hello,
I'm using LM234 as a current source in my circuit to supply 1.8mA. By the equations I should use a 38 Ohm R (67.7 mV/38Ohms = 1.78mA), however in the lab I had to use a 120Ohms R to get 1.8mA. Can you please…
Other Parts Discussed in Thread: LM234 , LM334 We are selected constant current source IC LM234. Supply voltage is 12V. Constant current 1mA. We are setting the external resistance 68 Ohm. Our output load variation RL 100 Ohm to 10.5 KOhm. I want to know…
Dear Ajay,
1. If your MPPSET voltage is at 1.2 V the input is in regulation. The charge current will be reduced in order to maintain the input voltage at the set point. Please refer to Equation 2 in Section 8.3.2. Also, can you please explain the LM234…
