AD620 Microvolt mV Voltage Amplifier Signal Instrumentation Module

= High-Precision Instrumentation Amplifier for Sensor Signal Conditioning =

The AD620 is a lowcost, highaccuracy instrumentation amplifier requiring only one external resistor to set gains from 1 to 10,000. It is optimized for 3-12VDC operation and is ideal for amplifying small differential signals such as ECG, strain gauge outputs, and bridge transducers.

= Technical Specifications =

= Key Features =

+Single External Resistor Gain Set - Simplifies design for variable gain applications

+Excellent CMRR - 100dB minimum for noise rejection

+Low Input Bias Current - 1nA max suitable for high impedance sensors

+Low Noise - 9nV/√Hz at 1kHz

+Wide Supply Range - 3V to 12V for flexible power options

== Applications ==

1. ECG and medical instrumentation amplifiers
2. Strain gauge and bridge transducer amplifiers
3. Industrial process control and sensor interfaces
4. Data acquisition systems and signal conditioning
5. Portable and battery-powered instrumentation

√ Available in DIP and SOIC packages

√ 8pin throughhole and SMD versions

√ Low power consumption for portable designs

= Troubleshooting =

No output signal:

• Check supply voltage (3V to 12V DC)
• Verify gain resistor installation
• Ensure correct pin connections (pins 2 and 3 for inputs)

Excessive noise:

• Use proper bypass capacitors on supply
• Shield input leads from interference
• Check ground connections