AD8221-EP Datasheet

• Specified from −55°C to +125°C
  • 0.9 μV/°C maximum input offset average TC
  • 10 ppm/°C maximum gain vs. temperature (G = 1)
• Excellent ac specifications
  • 80 dB minimum CMRR at 10 kHz (G = 1)
  • –3 dB bandwidth: 825 kHz typical (G = 1)
  • 2 V/μs typical slew rate
• Low noise
  • 8 nV/√Hz, at 1 kHz, maximum input voltage noise
  • 0.25 μV p-p RTI (G = 100 to 1000)
• High accuracy dc performance
  • 80 dB minimum CMRR DC to 60 Hz (G = 1)
  • 70 μV maximum input offset voltage
  • 2 nA maximum input bias current
• Wide power supply range: ±2.3 V to ±18 V
• Available in space-saving MSOP
• Gain set with 1 external resistor (gain range 1 to 1000)

• Supports defense and aerospace applications (AQEC standard)
• Military temperature range (−55°C to +125°C)
• Controlled manufacturing baseline
• One assembly/test site
• One fabrication site
• Enhanced product change notification
• Qualification data available on request

• Bridge amplifiers
• Precision data acquisition systems
• Strain gages
• Transducer interfaces

The AD8221-EP is a gain programmable, high performance instrumentation amplifier that delivers the industry’s highest CMRR over frequency in its class. The CMRR of instrumentation amplifiers on the market today falls off at 200 Hz. In contrast, the AD8221-EP maintains a minimum CMRR of 80 dB to 10 kHz at G = 1. High CMRR over frequency allows the AD8221-EP to reject wideband interference and line harmonics, greatly simplifying filter requirements.

Possible applications include precision data acquisition, biomedical analysis, and aerospace instrumentation.

Low voltage offset, low offset drift, low gain drift, high gain accuracy, and high CMRR make this device an excellent choice in applications that demand the best dc performance possible, such as bridge signal conditioning.

Programmable gain affords the user design flexibility. A single resistor sets the gain from 1 to 1000. The AD8221-EP operates on both single and dual supplies and is well suited for applications where ±10 V input voltages are encountered.

The AD8221-EP is specified over the −55°C to +125°C military temperature range. It is available in an 8-lead MSOP package.

Additional application and technical information can be found in the AD8221 data sheet.