T3 Op-Amp tester

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Item#: MABP0295
$9.5 (unit price)
Weight:0.2KG Quantity:

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>=10	$ 9.5
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T3 Operational Amplifier Tester

Test Principle:
A signal source generates a high-frequency square wave at 200 kHz and a low-frequency square wave at approximately 10 Hz. The operational amplifier under test (AUT) is configured as a unity-gain buffer circuit.

• For High-Speed Op-Amps: When either the high or low-frequency square wave is applied, the output responds correctly. This is indicated by the corresponding red LED synchronizing with the yellow reference LED—remaining constantly illuminated (at 200 kHz) or blinking (at 10 Hz).

• For Low-Speed Op-Amps: When the high-frequency signal is input, the output stage fails to reproduce the waveform faithfully. This malfunction is indicated by the corresponding red LED failing to illuminate normally—it may light dimly, flicker, or remain completely off. However, with the low-frequency input signal, the output functions correctly, and the red LED blinks in synchronization with the yellow LED.

  The board provides test points for measuring the quiescent current (I_Q) of the op-amp under a ±5V supply. Analyzing the quiescent current value provides insight into certain characteristics of the amplifier and aids in model differentiation.

  The available test modes are as follows:

  1. Quiescent current measurement with the chip configured as a buffer.

  2. Operational status under high-frequency signal.

  3. Operational status under low-frequency signal.

  4. Wire Connection: 12 VDC, requiring a current rating of 100 mA or higher.

  5. Common Adapter: A standard 12V/1A power adapter with a 5.5×2.5 mm plug (center positive).
     Either mode can be selected based on practical needs.

  Weight: 35 grams

  Application Notes:DC output voltage measurement with the chip configured as a buffer and its input grounded.
  
  Single Op-Amp Models: LM741, LF356, NE5534, TL071, TL081, OP07, and other standard-packaged single op-amps.
  Dual Op-Amp Models: LM358, NE5532, TL072, TL082, MC1458, RC4558, OP275, AD827, and other standard-packaged dual op-amps.
  Quad Op-Amp Models: LM324, TL074, TL084, LF347, AD713, etc
  
  PCB Dimensions: 9.5 x 5.8 cm
  
  Power Supply Requirements:
  Two modes are available:
  1.As a Power Adapter Converter: The onboard terminal blocks and the 5.5 mm DC jack are connected in parallel. This allows the board to function as a conversion interface between a barrel plug adapter and wire connections. 2. As a Signal Generator: Output leads can be connected to the relevant test points to utilize the board as a square wave signal source, with a frequency range of 20 Hz to 200 kHz.

Testing Precautions:

1. Only one chip can be tested at a time. Of the three test sockets, only one may be used in any single test.

2. TP1 Test Point (Quiescent Current):

   • Use a digital multimeter set to the DC voltage range.

   • Measure the voltage across the 10-ohm resistor.

   • Calculate the current using the formula: I = V / 10 (mA). For example, if V = 15 mV, then I = 1.5 mA.

   • Note: The red switch on the right (in the diagram) should NOT be pressed during this measurement.

   • 1. TP2 Test Point (DC Offset Voltage): Use a multimeter in the DC voltage range to measure the op-amp's DC output offset voltage.

     2. For surface-mount (SMD) op-amps, an appropriate adapter clip can be used for testing.

MABP0295

MABP0295

MABP0295

MABP0295

MABP0295

MABP0295

MABP0295

MABP0295

MABP0295

MABP0295

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