AD8221ARZ-R7 Datasheet Summary

1. Basic Information

• Part Number: AD8221ARZ-R7
• Manufacturer: Analog Devices, Inc.
• Device Type: Precision Programmable Gain Instrumentation Amplifier
• Grade: AR (Industrial)
• Package: 8-Lead Narrow SOIC (R-8)
• Packing: 7" Tape-and-Reel, RoHS Compliant (Z)
• Temperature Range:
• Document Revision: Rev. C

2. Key Features

• Gain Configurable: 1 to 1000 via 1 external resistor (RG)
• Gain formula: G = 1 + (49.4 kΩ / RG)
• Wide supply range: ±2.3 V to ±18 V
• Exceptional CMRR: 80 dB minimum at 10 kHz (G=1)
• Low input voltage noise: 8 nV/√Hz @ 1 kHz
• Low input offset voltage: 60 µV max
• Low input bias current: 1.5 nA max
• Bandwidth: 825 kHz (G=1)
• Slew rate: 2 V/µs
• Available in space-saving SOIC and MSOP packages

3. Electrical Specifications (VS = ±15 V, VREF = 0 V, TA = 25°C, G=1)

DC Performance

AC Performance

Power

4. Pin Configuration (8-Lead SOIC, Top View)

5. Absolute Maximum Ratings

• Supply Voltage: ±18 V
• Input Voltage (Differential/Common-Mode): ±VS
• Operating Temperature: −40°C to +125°C
• Storage Temperature: −65°C to +150°C
• Power Dissipation: 200 mW
• Output Short-Circuit Duration: Indefinite

6. Thermal Characteristics

• Package: 8-Lead SOIC (R-8)
• θJA (4-layer JEDEC board): 121°C/W

7. Gain Selection Table (1% Standard Resistors)

8. Applications

• Precision Bridge Amplifiers (Load Cells, Strain Gages)
• Weigh Scales
• Industrial Process Controls
• Medical Instrumentation
• Data Acquisition Systems
• Transducer Signal Conditioning

9. Application Guidelines

• Place a 0.1 µF ceramic capacitor close to each supply pin.
• Keep RG traces short to maintain high CMRR.
• REF pin must be driven from low-impedance source.
• Provide input bias current return path for floating sources.
• Inputs protected against 1 kV HBM ESD.