Description
AD623 Weak Signal Voltage Amplifier Module Signal Conditioning Programmable Gain Instrumentation amplifier
Product Description
The AD623 is a low-cost, high-accuracy instrumentation amplifier that requires only one external resistor to set the gain over a gain range of 1 to 1,000. Ideal for battery powered and portable (or remote) applications. The AD623 features high accuracy, low offset voltage, and low offset drift, making it ideal for precision data acquisition systems such as electronic scales and sensor interfaces. It also features low noise, low input bias current, and low power consumption, making it ideal for medical applications such as ECGs and non-invasive blood pressure monitors. The module has one-way fixed voltage output.
Specification
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item
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value
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Module model
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AD630
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Module type
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Weak signal amplifier
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Input signal form
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Single-ended or differential, Jumper cap can switch input form
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Input voltage range
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100uV-1Vpp
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Module supply voltage
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6.5~26V
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Module power supply current
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20mA
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Output voltage range
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±5V (MAX)
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Output current
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10mA (max)
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Module gain range
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1-1000 times, default 20 times
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Bias voltage adjustment range
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± 2V (MAX)
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Input offset voltage
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200uV (MAX)
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Input offset drift
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2uV/°C (MAX)
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Input bias current
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125nA (MAX)
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Common mode rejection ratio
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90dB (MIN, G = 10)
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Input voltage noise
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35nV Hz (1KHz)
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Module weight
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10g
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Module protection
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Yes, Diode anti-reverse connection protection
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Module weight
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16g
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Module specifications
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50*50*7mm, length * width * height-PCB size
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Module heating
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No heat sink, Excessive input voltage may heat up
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Module heating factor
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The input voltage is too large or the module is damaged
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Module working temperature
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-40℃~+75℃, industrial grade
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Module features
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Output power LED indication, output 5V linear power
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Scope of application
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Load cell, data acquisition front end, etc.
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Installation Instructions
Module usage precautions
(1) The power supply of the module is a single power supply, and the voltage cannot exceed 26V. (2) Since the module is a high-precision device, in order to avoid unnecessary interference, it is recommended to use a linear power supply. (3) It is recommended to use the SMA to BNC line input and output signal for the output signal. Use an oscilloscope to observe the effect. Poor contact or poor quality wire may cause signal attenuation or excessive noise.
Module usage precautions
Q: How to adjust zero when the module is single-ended input? A: The module is single-ended input by default. After the IN+ resistor is grounded, R6 can be adjusted to zero, or the input signal can be adjusted to adjust R6 to zero. Q: The module is single-ended by default. What should I do if I need to input differential signals? A: When you need to input differential signals, you need to remove the jumper cap first, and then use IN+ and IN- to input. When the differential signal is input, the output 0 point can adjust the bias potentiometer. Q: Solder the gain potentiometer, what happens if the gain of the potentiometer is adjusted and there is no response? A: The module has a default magnification. The welded potentiometer and the default resistor R2 are connected in parallel. First of all, the potentiometer is multi-turn and needs to be adjusted a few more turns, or the adjustment is more sensitive after removing the R2 resistor.
Details Images