High Voltage Op Amp 3581J
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Unit price: 35.0 yuan
01 High voltage single op amp
I. Introduction
The high-voltage op amp BB 3581 belongs to the first family of op amps capable of an output voltage range of plus or minus 145V. The 3581 op amp in this series has an output voltage range of plus or minus 75V. The 3581 purchased from Taobao has just arrived, so let's test its functions. Using this device can provide support for some high-voltage electronic experiments in the future.
2. Test results
1. Basic features
The device is packaged in a metal case and weighs 14.8 grams. Here is a question, how are the pins of this device distributed? I found some definitions of TO-3 metal can package from the Internet, most of them are distributed clockwise, that is, the first pin is in the lower left corner, and the numbers are 1, 2, 3, and 8 in the clockwise order. Through the measurement of the digital multimeter, it can also be found that the resistance between the pin in the lower right corner and other pins is infinite, which is consistent with the definition of the 8th pin of 3581 as having no internal connection. It is also given in the data sheet that this is the pin distribution corresponding to the top view, and this distribution also proves that the pin order is distributed clockwise.
2. Circuit test
In order to facilitate testing on the breadboard, the five pins used are led out through flat cables. Including positive and negative power supplies, positive and negative input ports, and the output of the op amp.
This is the schematic diagram of the test circuit, and the op amp is built in the form of a voltage follower circuit. Input 5V voltage at the positive terminal, and the output of the op amp is 5V. ·At this time, the working current of the circuit is about 4mA. This is preliminary evidence that the test circuit is working properly and that the op amp is functioning properly. Next, test the maximum output voltage of the op amp, and add two divider resistors in the negative feedback loop, so that the circuit has a magnification of 21 times. It is measured that the output of the circuit at this time is 21.99V. A voltage that differs from the positive input supply by 2V.
Next, measure the lowest value of the reverse output, input -5V, the measured output is -22.19V, and the difference from the negative power supply is almost 2V.
Increase the operating power supply voltage of the op amp from 24V to 60V. This is also the highest voltage that the DH1766 power supply used can provide. At this time, under the effect of negative 5V, the output is -57.73V. Change the input to positive 5V, and the output voltage is 57.4V. It can be seen that under the high voltage of 3581J, the difference between the output saturation voltage and the working power is about 2.5V. The working current of the positive power supply is 9mA, and the working current of the negative power supply is 4mA. Here the high-voltage working ability of 3581J is preliminarily verified.
3. Enlarge the waveform
Use the DG1062 signal source to output a sine wave with a peak-to-peak value of 5V and a frequency of 1kHz to measure the amplified waveform of BB3581J. It can be seen that the dynamic range of the enlarged waveform is within the positive and negative range of the output, and the waveform is not distorted. Here is the corresponding square wave signal, showing the high frequency range of the BB3581. This is a symmetrical triangle wave amplification waveform. This shows that the BB3581 has a very high output dynamic range.
▲ 图1.2.1 放大正弦波
After the signal with a peak-to-peak value of 5V is amplified by 21 times, the maximum and minimum values of the signal are 52.5V. This is within the previously measured output dynamic range of the 3581.
02 Data Sheet
1. Data sheet
※ Summary ※
This paper conducts a preliminary test on the high-voltage operational amplifier 3581. Its operating voltage is plus or minus 60V, and its output voltage range exceeds plus or minus 57.5V. Chips have high magnification. Through this chip, a signal source with a large dynamic range can be provided for high-voltage electronic devices in the future.
■ Links to related literature:
- Original disassembled machine American BB 3581J high-voltage single-transport physical shooting spot can be shot directly
- HIGH VOLTAGE OEPRATIONAL AMPLIFIERS 3580-3582
● Links to related diagrams: