AD623 Datasheet

• 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
• 14-terminal, 6 mm × 5.6 mm × 2.2 mm, LCC package
• 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)

• Low power medical instrumentation
• Transducer interfaces
• Thermocouple amplifiers
• Industrial process controls
• Difference amplifiers
• Low power data acquisition

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. With no external resistor, the AD623 is configured for unity gain (G = 1), and with an external resistor, the AD623 can be programmed 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. Line noise harmonics are rejected due to constant CMRR up to 200 Hz. 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.