UNI-OPAMP-04

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Tindie-mediums.png 8 opamp, SMT version

UNI-OPAMP-04 FRONT 3D.png

Features[edit]

  • 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[edit]

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[edit]

UNI-OPAMP-04 CAD Rev1.PNG

J1-J4 - Inputs[edit]

  • Pinout
  1. Opamp + input
  2. Opamp - input
  3. GND
  • J1 - CH 1
  • J2 - CH 2
  • J3 - CH 3
  • J4 - CH 4

J5-J8 - Outputs[edit]

  • Pinouts
  1. Opamp Out
  2. GND
  • J5 - CH 1
  • J6 - CH 2
  • J7 - CH 3
  • J8 - CH 4

Configurations[edit]

  • The reference designs (below) are for the first channel.

UNI-OPAMP-04 Ch1 Rev1.PNG

  • The resistor mapping from the first channel on the schematic to the other channels are as follows.

Resistor Stuffing by Channel[edit]

UNI-OPAMP-04 CAD Rev1.PNG

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[edit]

Differential Amplifier[edit]

Differential Amplifier - Reference Design (AN31)[edit]

Ap31-OpAmp-DiffAmp.PNG

Differential Amplifier Stuffing Options[edit]

OpAMP-DiffAmp.PNG

Current to Voltage Converter[edit]

Current to Voltage Converter - Reference Design (AN31)[edit]

Ap31-OpAmp-Curr2Volts.PNG

Current to Voltage Stuffing Options[edit]

OpAMP-sch - Curr2Volts.PNG

Inverting Amplifier[edit]

Inverting Amplifier - Reference Design (AN31)[edit]

Ap31-OpAmp-InvAmp.PNG

Inverting Amplifier Stuffing Options[edit]

OpAMP-sch - InvAmp.PNG

Non-inverting Amplifier[edit]

Non-inverting Amplifier - Reference Design (AN31)[edit]

Ap31-OpAmp-NonInvAmp.PNG

Non-inverting Stuffing Options[edit]

OpAMP-sch - NonInvAmp.PNG

Schematic[edit]

Single Channel Schematic (Editable)[edit]

OpAMP-sch-EDITABLE.png

U1 Part A Schematic[edit]

UNI-UPAMP-04 PartA.PNG

U1 Part B Schematic[edit]

UNI-UPAMP-04 PartB.PNG

U1 Part C Schematic[edit]

UNI-UPAMP-04 PartC.PNG

U1 Part D Schematic[edit]

UNI-UPAMP-04 PartD.PNG

Test[edit]

Measure OpAmp Input offset voltages[edit]

Input-Offset-Voltage-Test-Schematic Ann.png

Voltage Offset Measurements[edit]

  • New parts purchased from Mouser 2022-Aug
  • Bought tubes of 10 each
  • Picked first part out of each tube
  • LM324NE3
    • Channel A, 0.7mV
    • Channel B, 0.3mV
    • Channel C, 0.5mV
    • Channel D, 0.5mV
    • Vcc = 12V
    • Icc = 1mA
  • 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[edit]

UNI-OPAMP-04 REV1 MECHS.PNG

Videos[edit]

Assembly Sheet[edit]