Difference between revisions of "UNI-OPAMP-04"
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* From [https://www.electroschematics.com/test-op-amps-via-simple-input-offset-voltage-measurement/ Test Op Amps Via Simple Input Offset Voltage Measurement] | * From [https://www.electroschematics.com/test-op-amps-via-simple-input-offset-voltage-measurement/ Test Op Amps Via Simple Input Offset Voltage Measurement] | ||
* [[Benchtop_Power_Supply_DPS3005|DPS3005 Power Supply]] | * [[Benchtop_Power_Supply_DPS3005|DPS3005 Power Supply]] | ||
| + | ** 0.1A current limit | ||
| + | ** Use built in current meter to measure power supply current | ||
* Measure using DMM Extec EX330 | * Measure using DMM Extec EX330 | ||
** 0.1 mV resolution | ** 0.1 mV resolution | ||
Revision as of 15:53, 17 August 2022
8 opamp, SMT version
Contents
Features
- Universal OpAmp Board
- Configurable through stuffing options for typical OpAmp circuits
- Through hole parts
- 14 pin DIP
- 1/8 or 1/4W resistors
- 4 Channels, 1 Quad OpAmp
- Individual input and output headers per channel
- Terminal block or header for power
- Bypass capacitors
- 59X49mm form factor
- (4) 4-40 mounting holes
Typical OpAmps
| Part | LM324 | MCP6004 | NJM2060 |
|---|---|---|---|
| Operating Voltage | 3 to 30V | 1.8V to 6V | +/-4 to +/-18V |
| GBW Product | 1.2 MHz | 1 MHz | 10 MHz |
| Output Current (mA) | 10mA | 23mA | 25mA |
| Offset Voltage (max) | 7mV | 4.5mV | 6mV |
Connectors
J1-J4 - Inputs
- Pinout
- Opamp + input
- Opamp - input
- GND
- J1 - CH 1
- J2 - CH 2
- J3 - CH 3
- J4 - CH 4
J5-J8 - Outputs
- Pinouts
- Opamp Out
- GND
- J5 - CH 1
- J6 - CH 2
- J7 - CH 3
- J8 - CH 4
Configurations
- The reference designs (below) are for the first channel.
- The resistor mapping from the first channel on the schematic to the other channels are as follows.
Resistor Stuffing by Channel
| OpAmp | Ax-/Ix- | Ax+/Ix+ | Ax-/Qx | Ax-/GND | Ax+/GND | Ax+/VCC |
|---|---|---|---|---|---|---|
| U1A | R3 | R5 | R1 | R2 | R4 | R6 |
| U1B | R10 | R9 | R12 | R11 | R7 | R8 |
| U1C | R22 | R19 | R24 | R23 | R21 | R20 |
| U1D | R15 | R17 | R13 | R14 | R16 | R18 |
Reference Designs
- Reference drawings are from TI Ap Note 31 - Op Amp Circuit Collection
- Reference designators are for channel 1
- See resistor values table (above) schematic for other channels
Differential Amplifier
Differential Amplifier - Reference Design (AN31)
Differential Amplifier Stuffing Options
Current to Voltage Converter
Current to Voltage Converter - Reference Design (AN31)
Current to Voltage Stuffing Options
Inverting Amplifier
Inverting Amplifier - Reference Design (AN31)
Inverting Amplifier Stuffing Options
Non-inverting Amplifier
Non-inverting Amplifier - Reference Design (AN31)
Non-inverting Stuffing Options
Schematic
Single Channel Schematic (Editable)
U1 Part A Schematic
U1 Part B Schematic
U1 Part C Schematic
U1 Part D Schematic
Test
Measure OpAmp Input offset voltages
- From Test Op Amps Via Simple Input Offset Voltage Measurement
- DPS3005 Power Supply
- 0.1A current limit
- Use built in current meter to measure power supply current
- Measure using DMM Extec EX330
- 0.1 mV resolution
- Pick off split voltage at R8 (not power side)
- 12V for LM324NE3, NJM2080D
- 5V for MCP6004-E/IP
- Jumpers between + inputs
Voltage Offset Measurements
- LM324N
- Channel A, 0.1mV
- Vcc = 12V
- Icc = 2mA
- NJM2080D
- Channel A, 0.2mV
- Channel B, 0.4mV
- Channel C, 0.7mV
- Channel D, 0.6mV
- Vcc = 12V
- Icc = 8mA
- MCP6004
- Channel A, <0.1mV
- Channel B, 0.8mV
- Channel C, 1.3mV
- Channel D, 1.1mV
- Vcc = 5V
- Icc = 1mA
Mechanicals
Videos
