SPECIFICATIONS

Features:
1. This operational amplifier test board can be used to test common single operational amplifier, dual operational amplifier, and quad operational amplifier chips, and distinguish between high-speed and low-speed finished boards.
2. This circuit board can determine whether 1C can be used for amplification and also determine the conversion rate of the chip.
3. This T2 operational amplifier test board can identify low-speed chips that impersonate high-speed chips.
4. Equipped with LED indicator light, for high-speed operational amplifiers, they can output normally when inputting high and low frequency square wave signals, manifested as the corresponding red LED synchronized with the green LED, constantly on (200KHZ) or flashing (10Hz).
5. There are test terminals left on the board that can test the static current of the operational amplifier under positive and negative 5V power supply conditions. By measuring the static current, some characteristics of the operational amplifier can also be understood, and model differentiation can be made.

Testing principle:
The signal source generates high-frequency square waves with a frequency of 200KHZ and low-frequency square waves with a frequency of around 10Hz, and the tested operational amplifier is connected to a buffer circuit.
For high-speed operational amplifiers, they can output normally when inputting high and low frequency square wave signals, manifested as the corresponding red LED synchronized with the green LED, constantly on (200KHZ) or flashing (10Hz).
For low-speed operational amplifiers, when a high-frequency square wave signal is input, the output terminal cannot fully output the waveform, resulting in the corresponding red LED not being able to light up properly, only lighting up one or both without lighting up. It can only output normally when a low-frequency signal is input, and the corresponding red LED on the output end can flash synchronously with the green LED.
There are test terminals left on the board that can test the static current of the operational amplifier under positive and negative 5V power supply conditions. By measuring the static current, one can also understand some characteristics of operational amplifiers and distinguish between different models.

Parameter:
Power supply requirements: Voltage: 12V/DC, current above 100mA
PCB size: 9.5X5.8 cm
Supported models:
Single operational amplifier models: LM741, LF356, NE5534, TL071, TL081, OP07 and other standard packaged single operational amplifiers.
Dual operational amplifier models: LM358, NE5532, TL072, TL082, MC1458, RC4558, 0P275, AD827 and other standard packaged dual operational amplifiers.
Four operational amplifier models: LM324, TL074, TL084, LF347, AD713, etc

Testing precautions:
1. Only one chip can be tested at a time, and only one of the three test sockets can be used.
2. For static current testing, a DC voltmeter with a digital multimeter is required to test the voltage at both ends of 10 ohms, with I=V/10 (ma). For example, if V=15MV, the static current I=1.5 ma (at this time, there is no need to press the red switch on the right side of the figure).
3. The testing end can be connected to an oscilloscope or frequency meter, and the potentiometer can be adjusted to change the testing frequency.

Package include:
1X operational amplifier test board