Features:
1. This op amp test board can be used to test common single op amp, dual op amp, and quad op amp chips, and distinguish high-speed and low-speed finished boards.
2. This circuit board can determine whether can be used for amplification, and also determines the conversion rate of the chip.
3. This T2 op amp test board can identify low-speed chips that damage high-speed chips.
4. Equipped with LED indicator lights, for high-speed op amps, when high and low-frequency square wave signals are input, they can output normally, which is manifested as the corresponding red LED and green LED synchronously lit (200KHZ) or flashing (10Hz).
5. There are test terminals on the board, which can test the quiescent current of the op amp under positive and negative 5V power supply conditions. By measuring the quiescent current, some characteristics of the operational can also be understood, and the model can be distinguished.
Test principle:
The signal source generates a high-frequency square wave with a frequency of 200KHZ and a low-frequency square wave with a frequency of about 10Hz. The op amp under test is connected to the buffer circuit.
For high-speed operational , the output can be normal by inputting high- and low-frequency square wave signals, which is manifested as the corresponding red LED is synchronized with the green LED, and is always on (200KHZ) or flashing (10Hz).
For low-speed operational , when a high-frequency square wave signal is input, the output end cannot fully output the waveform, resulting in the corresponding red LED not being able to light up normally, only 1 is on or both are not on. Only when a low-frequency signal is input can the output be normal, and the corresponding red LED at the output end may flash synchronously with the green LED.
There are test terminals on the board, which can test the quiescent current of the op amp under positive and negative 5V power supply conditions. By measuring the quiescent current, you can also understand some characteristics of the operational and distinguish different models.

Specifications:
Part name: Operational test board
Material: abs
Color: as shown
Power supply requirements: Voltage: 12V/DC, current greater than 100mA
Size: PCB size: 9.5X5.8cm
Supported models: 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, 0P275, AD827 and other standard packaged dual op amps.
Four types of operational : LM324, TL074, TL084, LF347, AD713, etc.
Testing precautions:
1. Only 1 chip can be tested at a time, and only 1 of the three test sockets can be used.
2. For the static current test, you need to use the DC voltmeter of a digital multimeter to test the voltage across 10 ohms, I=V/10 (ma). For example, if V=15MV, the static current I=1.5ma (there is no need to press the red switch on the right side of the figure).
3. The test end can be connected to an oscilloscope or frequency meter, and the potentiometer can be adjusted to change the test frequency.

Package Contents：
1X operational test board