AD623 Instrumentation Amplifier IC Chip

AD623(Single and Dual-Supply, Rail-to-Rail,Low Cost Instrumentation Amplifier)

Introduction

The AD623 is an integrated, single- or dual-supply instrumentation amplifier that delivers rail-to-rail output swing using supply voltages from 2.7 V to 12 V. The AD623 offers user flexibility by allowing single gain set resistor programming and by conforming to the 8-lead industry standard pinout configuration. Without any external resistor, the AD623 is set up for unity gain (G = 1). However, by using an external resistor, the AD623 can be configured for gains of up to 1000.

The accuracy of the AD623 is the result of increasing ac common-mode rejection ratio (CMRR) coincident with increasing gain. Constant Common-Mode Rejection Ratio (CMRR) up to 200 Hz ensures the rejection of line noise harmonics. The AD623 has a wide input common-mode range and amplifies signals with common-mode voltages as low as 150 mV below ground. The AD623 maintains optimal performance with dual and single polarity power supplies.

Feature

• Easy to use
• Rail-to-rail output swing
• Input voltage range extends 150 mV below ground(single supply)
• Low power, 550 μA maximum quiescent current
• Gain set with one external resistor
• Gain range: 1 to 1000
• High accuracy dc performance
• 0.10% gain error(G= 1)
• 0.35% gain error(G > 1)
• Noise: 35 nV/√Hz RTI noise at 1 kHz
• Optimal dynamic specifications
• 800 kHz bandwidth (G= 1)
• 20 μs settling time to 0.01% (G= 10)

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