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Millivolt/microvolt voltage amplifier AD623/AD620 Instrumentation amplifier
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Millivolt/microvolt voltage amplifier AD623/AD620 Instrumentation amplifier

Funduino
€10.87 *
Content: 1 Piece

incl. VAT plus shipping costs

Delivery time: appr. 1-3 days

  • Item no: F23107712
  • Weight: 0,01 kg
  • Packing dimensions: 9 cm x 6 cm x 2 cm (L x W x H)
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Description Reviews 0
Description
AD623/AD620 millivolt/microvolt voltage amplifier / signal amplifier / instrumentation... more
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AD623/AD620 millivolt/microvolt voltage amplifier / signal amplifier / instrumentation amplifier module

Product description:
Module with dedicated instrumentation amplifier core, rail-to-rail output, high input impedance, high common mode rejection ratio, low offset and drift, low noise, high closed-loop gain stability and precise measurement/amplification.
Module features
  • High-quality dedicated instrumentation amplifier AD623 core with high precision and good linearity.
  • Integrated negative pressure generation module, dual power supply operation, easy to handle negative signal / AC signal.
  • Current input LC filtering to ensure the stability of signal amplification.
  • Built-in negative voltage generation module requires only a single power supply for dual power supply operation
  • Rail-to-rail output, the maximum output swing is +-VCC
  • Magnification 2-1000x adjustable, suitable for various applications
The most important parameters
  • Amplifier type: Dedicated instrumentation amplifier AD623 Core
  • Input range: 0.5 VCC (i.e. the voltage between S+/S- is less than half the supply voltage)
  • Output range: +-VCC (rail-to-rail)
  • Magnification: 2-1000x adjustable.
  • Current consumption: 150 uA (typical) 650 uA (maximum)
  • Power supply: 3-5.5 V
  • Gain accuracy: 0.35 % (G > 2) 0.10 % (G = 2)
  • Input offset voltage: 100-200uV
  • Input offset drift: 1 U/°C 1 UV/℃
  • Common mode rejection ratio: 90 dB
  • Gain bandwidth: 800 kHz.
  • PCB size: 40 x 23 mm
It is recommended to test with a smaller magnification (e.g. 50/100x) and then adjust to the desired multiple. Turning the A++ knob clockwise increases the magnification (up to 1000x). When it is set to the maximum, a slight click of the potentiometer can be heard, indicating that it is set to the end. It is also possible to set the magnification using a resistor so that the gain value remains more stable.
Notes:
  1. Often Ref is seen as a zero pin, which is not a problem, but the accuracy of the AD623 core is very high. When the reference is directly grounded, the output is very close to 0 and does not need to be adjusted in practice. It is recommended to adjust the voltage on the ref pin only if a voltage shift is required
  2. The offset voltage of the AD623 is 200 uV, which can lead to an error of 200 uV in the input voltage. Therefore, the initial error is larger when the input voltage is smaller. It is recommended that the signal should not be lower than 3 mV.
  3. The 3 dB gain bandwidth of the AD623 is 800 kHz, i.e. gain multiple * frequency = 800 kHz. So when the DC signal is amplified, it can reach about 1000 times. At 800 times amplification, the signal should not be higher than 1 kHz. At 10 times amplification, the signal should not be higher than 80 kHz and so on. The higher the signal frequency, the greater the gain loss.
  4. The adjustment range of the reference end should not be too large, otherwise the magnification will be impaired.
  5. The output voltage range of the amplifier is limited by the supply voltage. The linear range of the AD623 module is up to +-VCC. If AD620 / LM358 and other amplifiers are operated with +5 V and -5 V, the linearity is only between -3.6 V and + 3.6 V.
  6. The ref pin of the AD623 can only pull the output voltage up/down. Normally it is grounded. If you need to use the Ref pin to pull the output up or down, you can change the voltage of this pin , but in this case, please note that the linear range of magnification will not change by changing 5 pins and its output will not exceed VCC.
Scope of delivery:
  • 1x millivolt/microvolt voltage amplifier AD623/AD620 instrumentation amplifier module
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