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AD620 Instrumentation Amplifier

Analog Devices’ instrumentation amplifier is low drift, low power, high accuracy, and is ideal for high-precision applications

Image of Analog Devices AD620 Instrumentation AmplifierADI’s AD620 comes in 8-lead SOIC and DIP packages and are low-cost, high-accuracy instrumentation amplifiers that, with an external resistor, allow the user to set gains of 1 to 10,000. The small footprint design and low power consumption (only 1.3 mA (maximum) supply current) make it a good fit for portable or remote applications that require a battery.

The AD620, with its high accuracy of 40 ppm (maximum) nonlinearity, low offset voltage of 50 µV (maximum), and offset drift of 0.6 µV/°C (maximum), is ideal for use in precision data acquisition systems such as weigh scales and transducer interfaces. Furthermore, the low noise, low input bias current, and low power of the AD620 make it well suited for medical applications such as ECG and noninvasive blood pressure monitors.

The low input bias current of 1.0 nA (maximum) is made possible with the use of Superϐeta processing in the input stage. The AD620 works well as a preamplifier due to its low input voltage noise of 9 nV/√Hz at 1 kHz, 0.28 μV p-p in the 0.1 Hz to 10 Hz band, and 0.1 pA/√Hz input current noise. Also, the AD620 is well suited for multiplexed applications with its settling time of 15 μs to 0.01%, and its cost is low enough to enable designs with one in-amp per channel.

Features
  • Easy to use
  • Gain range of 1 to 10,000 with one external resistor
  • Wide power supply range (±2.3 V to ±18 V)
  • Higher performance than three op amp IA designs
  • Low power, 1.3 mA (max.) supply current
  • 50 μV (max.), input offset voltage
  • 0.6 μV/°C (maximum) input offset drift
  • 1.0 nA (max.), input bias current
  • 100 dB (min.) common-mode rejection ratio (G = 10)
  • Low noise
  • 9 nV/√Hz at 1 kHz input voltage noise
  • 0.28 μV p-p noise (0.1 Hz to 10 Hz)
  • 120 kHz bandwidth (G = 100)
  • 15 μs settling time to 0.01%

Evaluation Board

ImageManufacturer Part NumberDescriptionPart StatusChannels per ICAvailable QuantityView Details
EVAL BOARD FOR SOIC/DIP IN-AMPEVAL-INAMP-62RZEVAL BOARD FOR SOIC/DIP IN-AMPActive1 - Single17 - ImmediateView Details

AD620 Instrumentation Amplifier

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC INST AMP 1 CIRCUIT 8DIPAD620ANIC INST AMP 1 CIRCUIT 8DIP0View Details
IC INST AMP 1 CIRCUIT 8DIPAD620ANZIC INST AMP 1 CIRCUIT 8DIP1557 - ImmediateView Details
IC INST AMP 1 CIRCUIT 8SOICAD620ARZIC INST AMP 1 CIRCUIT 8SOIC7008 - ImmediateView Details
IC INST AMP 1 CIRCUIT 8SOICAD620ARZ-REEL7IC INST AMP 1 CIRCUIT 8SOIC11138 - ImmediateView Details
IC INST AMP 1 CIRCUIT 8SOICAD620ARZ-REELIC INST AMP 1 CIRCUIT 8SOIC1116 - ImmediateView Details
IC INST AMP 1 CIRCUIT 8DIPAD620BNZIC INST AMP 1 CIRCUIT 8DIP577 - ImmediateView Details
IC INST AMP 1 CIRCUIT 8SOICAD620BRZIC INST AMP 1 CIRCUIT 8SOIC2502 - ImmediateView Details
IC INST AMP 1 CIRCUIT 8SOICAD620BRZ-R7IC INST AMP 1 CIRCUIT 8SOIC3455 - ImmediateView Details
IC INST AMP 1 CIRCUIT 8SOICAD620BRZ-RLIC INST AMP 1 CIRCUIT 8SOIC3491 - ImmediateView Details
Published: 2016-12-22