Can SMD AD8628A replace AD8620?

It cannot be replaced. The basic data of the two patches are not the same, and if they are forced to be replaced, a short circuit or open circuit will occur.

ad8628

Bandwidth: Slew Rate: 1V s

Supply voltage range: to 5V

Slope of change: 1v s

Part number: 8628

Gain Bandwidth: Supply Voltage Maximum: 6V

Supply voltage Minimum:

ad8620

Bandwidth: 25MHz

Slew rate: 50V s

Supply voltage range: 5V to 13V

Package Type: SOIC

Slope of change: 50V s

Gain bandwidth: 25MHz

Supply voltage Max: 13V

Supply voltage Minimum: 5V

ad8628

Op Amp Type: Zero drift.

Number of amplifiers: 1

Bandwidth: Slew Rate: 1V s

Supply voltage range: to 5V

Package Type: SOIC

Number of pins: 8

Operating temperature range: -40°C to +85°C Slope: 1V s

Part number: 8628

Gain Bandwidth: Package Type: SOIC

Operating temperature sensitive: -40°C

Operating temperature: 85°C

Amplifier Type: Rail-to-Rail Input Output (RRIO) Temperature Range: Commercial.

Supply voltage Max: 6V

Supply voltage Minimum:

Chip designation: 8628

Surface Mount Devices: Surface Mount.

Input Output Type: Rail-Rail I O Input Offset Voltage Maximum: 1mV

Op Amp Features: Zero Drift, Low Noise, Full Amp Output Logic Function Number: 8628

Quiescent Current, IQC Max:

Rated supply voltage, +

ad8620

Op Amp Type: Low noise.

Number of amplifiers: 2

Bandwidth: 25MHz

Slew rate: 50V s

Supply voltage range: 5V to 13V

Package Type: SOIC

Number of pins: 8

Operating temperature range: -40°C to +85°C Slope: 50V s

Part number: 8620

Gain bandwidth: 25MHz

Package Type: SOIC

Operating temperature sensitive: -40°C

Operating temperature: 85°C

Amplifier Type: JFET Op Amp.

Temperature Range: Commercial.

Supply voltage Max: 13V

Voltage Minimum: 5V

Chip number: 8620

Surface Mount Devices: Surface Mount.

Input offset voltage max.: 100 V

Logic function number: 8620

Rated supply voltage, +13V

A double op amp, a single op amp, from the data point of view, can not be replaced.

But your design takes a lot of time, sorry, I don't have time to complete it.

There are a lot of people here who do graduation projects full-time, so look for them.

GY-BL Zinc Oxide Arrester Tester.

Product features: 1. This machine adopts large-screen LCD display and full Chinese character menu operation.

2. High-precision sampling, processing circuit, advanced Fourier harmonic analysis technology to ensure the reliability of data.

3. There is a fuse at the input end of the reference voltage, and there is an isolation transformer inside the instrument to completely isolate the instrument from the on-site PT, and the double insurance ensures the safety of PT.

4. It has the functions of resistive current fundamental peak output, edge phase correction and so on.

5. The instrument is equipped with a rechargeable battery, a calendar clock, and a micro printer, which can store 210 sets of measurement data.

6. Equipped with Yanzheng RS-232 communication interface, which can upload data to the computer for processing.

Full leakage current measurement range (peak): 100UA-10mA

Resistive current measurement range (peak): 0-10mA

Capacitive current measurement range (peak): 0-10mA

Measurement range of angle jujube delay: 0·-360·

Power consumption: 4W

System measurement accuracy: reading 5% + 5 digits) (harmonic current is not more than 2mA).

AC Power: AC 220V 10%, 50Hz 1%.

1. The measured value of the oxygen analyzer drifts irregularly.

Cause: Unstable sample pressure and flow rate.

Treatment: Set the pressure and flow regulator to ensure that the sample gas pressure and flow rate entering the analyzer are constant.

Cause: Poor contact of the zero position of the measuring loop or the range potentiometer causes the output signal to drift.

Treatment: Inspection, maintenance or replacement of potentiometers.

2. The measured value of the oxygen analyzer is unstable or swings repeatedly.

Reason Shi Bihu: The performance of the DC regulated power supply is not good, resulting in the unstable working current of the measuring bridge.

Treatment: Overhaul or replace the regulated power supply to improve the accuracy of the regulated voltage.

Reason: The constant temperature performance of the oxygen analyzer is not good, the temperature fluctuation is too large, and the measured value drifts irregularly due to the unstable heat dissipation conditions of the hot wire.

Treatment: Inspection, maintenance or replacement of potentiometers.

Cause: Zero potentiometer malfunction or poor contact.

Treatment: Replacement or maintenance.

3. Water mist and droplets of oxygen analyzer will cause damage to the heat-sensitive components.

Cause: Water mist or droplets inside the detector.

Dust management: The instrument is powered off, and the detector is purged or cleaned with dry air. Purge pressure:.

Cause: Oily or sticky substances are ingested into the detector.

Treatment: After the instrument is powered off and the detector is reduced to room temperature, it is washed and cleaned with washing liquid, and then dried with dry air.

Oxygen analyzers.

Jiangsu University is a national key university, in Zhenjiang, the comprehensive ranking is after 80, and the reputation is not high. Its main predecessor, Jiangsu University of Science and Technology, belongs to the Ministry of Machinery, which is strong in fluid machinery, automobiles and other majors throughout the country, and has the only pump research institute in the country. Engineering majors are very employable, and some are very sought-after in the Yangtze River Delta.

In Shandong, if your college entrance examination score is about 15 points higher than the key line, it is still very good to be admitted to Jiangsu University.

Electrical engineering and automation majors are divided into strong and weak current directions, and I studied strong electricity in the direction of power systems. The main courses include automatic control theory and power electronics.

Professional basic courses: circuits, analog circuits and digital circuits, single-chip microcomputer, engineering mechanics, linear algebra, complex variable functions, mathematical equations, software technology basics.

Professional courses: power system transient analysis, power system steady state analysis, power plant electrical part, relay protection principle, automatic control theory, power electronics technology, electrical engineering, electromagnetism, telecontrol communication, dispatching automation, high voltage technology, professional English.

I won't talk about high math, English, physics, etc. in my freshman year.

The basic courses in the direction of weak electricity are similar, and the specialized courses are not clear.

In terms of hardware characteristics, one is functional, and the other is performance.

In terms of talent training, how many times is the training cost (including time cost) of an analog engineer compared to that of a digital engineer?

From the perspective of the development process, what is the most time-consuming and energy-consuming thing in digital IC development, not the front-end system level and RTL level, but the back-end PATH optimization clock to optimize the EMC design, isn't this just doing simulation, and how much cost is spent on analog in high-speed digital design?

In terms of industry conditions, Nokia can surpass Moto in one fell swoop in the digital age, but when it comes to analog technology, how many are Moto's opponents? Domestic digital IC companies can beat Sigmatel as soon as they grasp a large piece, but who dares to challenge NS and ADI in the analog IC industry?

In terms of work intensity, do digital engineers work more overtime or analog engineers work more overtime? Simulations can't be done overtime.

Huawei certification, now the country pays attention to network security, and the procurement is mainly based on Huawei communication equipment.

Depending on what the battery is used for, XT60 or X90 is better.

"Principles of Automatic Control", "Circuits".