Part Number: AD620, AD620AN
Functions: Low Cost Low Power Instrumentation Amplifier
Package: DIP 8, SOIC 8 Pin Type
Manufacturer: Analog Devices ( https://www.analog.com/ )
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Description:
The AD620 is a low cost, high accuracy instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. Furthermore, the AD620 features 8-lead SOIC and DIP packaging that is smaller than discrete designs and offers lower power (only 1.3 mA max supply current), making it a good fit for battery-powered, portable (or remote) applications.
Features:
1. Gain set with one external resistor (Gain range 1 to 10,000)
2. Wide power supply range (±2.3 V to ±18 V)
3. Higher performance than 3 op amp IA designs
4. Low power, 1.3 mA max supply current
Pinouts and schematic:
Applications
1. Weigh scales
2. ECG and medical instrumentation
3. Transducer interface
4. Data acquisition systems
5. Industrial process controls
6. Battery-powered and portable equipment
AD620 Voltage Amplifier Module Differential Single-Ended/Differential Small Signal Instrumentation
Arduino modules using instrumentation amplifiers (ICs) are used to measure sensor signals, amplify them appropriately and transmit them to the Arduino. Instrumentation amplifiers are high-performance offset and high-sensitivity electrical circuits specialized for measuring and amplifying small voltage differences.
The process for integrating an instrumentation amplifier into an Arduino module is as follows:
1. Connect a sensor: Select a sensor that detects the physical quantity you want to measure (temperature, pressure, etc.) and connect it to the instrumentation amplifier.
2. Instrumentation amplifier configuration: The instrumentation amplifier generally consists of three working amplifiers. Connect these amplifiers in a suitable manner to form the entire circuit.
3. Power supply: supplies power to the instrumentation amplifier. It generally consists of a positive voltage (Vcc) and a negative voltage (Vss).
4. Output connections: Connect the output of the instrumentation amplifier to the analog input pin of the Arduino.
5. Programming: Write Arduino code to interpret measured values and perform special tasks when needed.
Instrumentation amplifiers allow you to reliably measure very small signals from sensors and provide robust protection against noise or interference.
Useful Reference Site:
https://forum.arduino.cc/t/load-cell-and-ad620-as-amplifier/342673
AD620 Pinout Datasheet File
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