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m718
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Do opamps have current limit, I have an OP-27 dual supply connected to 2 9V batters the battery measures 3 Amps and 16 volts is this too much current?
Op Amp Current Supply - Is 3 Amps Too Much?
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Discussion Overview
The discussion revolves around the current supply for an OP-27 operational amplifier connected to a dual 9V battery setup. Participants are questioning whether a measured current of 3 Amps is excessive and exploring potential circuit issues that could lead to such a high current draw.
Discussion Character
- Technical explanation
- Debate/contested
Main Points Raised
- One participant questions if op-amps have a current limit, noting a measurement of 3 Amps and 16 volts, suggesting this may be too much current.
- Another participant asserts that the OP-27 is a standard op-amp that typically does not draw or drive currents exceeding a few tens of milliamps, implying a circuit issue.
- There are suggestions to check power connections, with a possibility that the supply connections might be reversed.
- Concerns are raised about components getting hot, particularly resistors on the positive supply, indicating potential overload or misconfiguration.
- Participants request a schematic to better understand the circuit configuration and diagnose the problem.
- One participant mentions the order of connecting the batteries (ground first, then positive and negative) and questions if this could damage the op-amps.
- Another participant warns that mis-wiring could lead to high currents through the device's substrate, highlighting the risks of incorrect power supply connections.
Areas of Agreement / Disagreement
Participants generally agree that there is likely a circuit problem causing the high current draw, but there is no consensus on the exact cause or solution. Multiple competing views on the wiring and configuration remain unresolved.
Contextual Notes
Limitations include the lack of a schematic, which is necessary for a more accurate diagnosis. The discussion also reflects uncertainty regarding the effects of the connection order on the op-amps.