AD623

Part: AD623ARMZ — Analog Devices

Type: Single/Dual-Supply Rail-to-Rail Instrumentation Amplifier

Description: 2.7–12 V single- or dual-supply instrumentation amplifier with rail-to-rail output, gain of 1 to 1000 set by one external resistor, 800 kHz bandwidth (G = 1) and 550 μA maximum quiescent current.

Operating Conditions:

• Supply voltage: 2.7–12 V
• Operating temperature: -40 to +85 °C
• Gain range: 1 to 1000, G = 1 + (100 kΩ / RG)
• Input voltage range: (-VS) - 0.15 V to (+VS) - 1.5 V (VS = 3 V to 12 V single supply)

Absolute Maximum Ratings:

• Max supply voltage: 12 V
• Differential input voltage: ±6 V
• Internal power dissipation: 650 mW (free air); θJA = 200 °C/W for the 8-lead MSOP
• Output short-circuit duration: indefinite
• Storage temperature: -65 to +125 °C
• Lead temperature (soldering, 10 sec): 300 °C

Key Specs:

• Gain error (G = 1): 0.03% typ, 0.10% max (AD623A grade); 0.35% max for G > 1
• Nonlinearity: 50 ppm typ (G = 1 to 1000)
• Input offset voltage (VOSI): 25 μV typ, 200 μV max (AD623ANZ/ARZ); AD623ARM: 200 μV typ, 500 μV max (VS = 5 V single supply)
• Input bias current: 17 nA typ, 25 nA max
• Input impedance: 2 GΩ || 2 pF (differential and common-mode)
• CMRR at 60 Hz with 1 kΩ source imbalance, G = 1: 70 dB min, 80 dB typ (AD623A/ARM)
• Small-signal bandwidth: 800 kHz (G = 1), 100 kHz (G = 10), 10 kHz (G = 100), 2 kHz (G = 1000)
• Slew rate: 0.3 V/μs typ
• Settling time to 0.01%: 30 μs (G = 1), 20 μs (G = 10)
• Output swing (RL = 10 kΩ, single supply): 0.2 V to (+VS) - 0.5 V

Features:

• 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
• 35 nV/√Hz RTI noise at 1 kHz
• Industry-standard 8-lead pinout
• Constant CMRR up to 200 Hz

Applications:

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

Package:

• 8-lead MSOP (AD623ARMZ)

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)

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

Figure 2. Pin Configuration

Table 6. Pin Function Descriptions

Table 5.

1

Specification is for device in free air: 8-Lead PDIP Package: θJA = 95°C/W 8-Lead SOIC Package: θJA = 155°C/W 8-Lead MSOP Package: θJA = 200°C/W

Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability.