ADI AD623ANZ

The AD623 is an integrated single-supply instrumentation amplifier that delivers rail-to-rail output swing on a 3V to 12V supply. The AD623 offers superior 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 up to 1000. The AD623 holds errors to a minimum by providing superior ac CMRR that increases with increasing gain. Line noise, as well as line harmonics, are rejected because the CMRR remains constant up to 200 Hz. The AD623 has a wide input commonmode range and can amplify signals that have a common-mode voltage 150 mV below ground. Although the design of the AD623 was optimized to operate from a single supply, the AD623 still provides superior performance when operated from a dual voltage supply ±2.5V to ±6.0V. Low power consumption (1.5 mW at 3V), wide supply voltage range, and rail-to-rail output swing make the AD623 ideal for battery-powered applications. The rail-to-rail output stage maximizes the dynamic range when operating from low supply voltages. The AD623 replaces discrete instrumentation amplifier designs and offers superior linearity, temperature stability, and reliability in a minimum of space.

• Easy to use
• Higher performance than discrete design
• Single-supply and dual-supply operation
• Rail-to-rail output swing
• Input voltage range extends 150 mV below ground (single supply)
• Low power, 550 μA maximum supply current
• Gain set with one external resistor Gain range: 1 (no resistor) to 1000
• High accuracy dc performance 0.10% gain accuracy (G = 7) 0.35% gain accuracy (G > 7) 10 ppm maximum gain drift (G = 1) 200 μV maximum input offset voltage (AD623A) 2 μV/°C maximum input offset drift (AD623A) 100 μV maximum input offset voltage (AD623B) 1 μV/°C maximum input offset drift (AD623B) 25 nA maximum input bias current
• Noise: 35 nV/√Hz RTI noise @ 1 kHz (G = 1)
• Excellent ac specifications 90 dB minimum CMRR (G = 70); 70 dB minimum CMRR (G = 7) at 60 Hz, 1 kΩ source imbalance 800 kHz bandwidth (G = 7) 20 μs settling time to 0.07% (G = 70)

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