AD8220-EP Datasheet

• High CMRR
  • 100 dB CMRR (minimum), G = 10 (B grade)
  • 80 dB CMRR (minimum) to 5 kHz, G = 1 (B grade)
• Excellent ac specifications and low power
  • 1.5 MHz bandwidth (G = 1)
  • 14 nV/√Hz input noise (1 kHz)
  • Slew rate: 2 V/μs
  • 750 μA quiescent supply current (maximum) 
• Low input currents
  • 10 pA maximum input bias current (B grade)
  • 0.6 pA maximum input offset current (B grade) 
• Versatile
  • MSOP package
  • Rail-to-rail output
  • Input voltage range to below negative supply rail
  • 4 kV ESD protection
  • 4.5 V to 36 V single supply
  • ±2.25 V to ±18 V dual supply
  • Gain set with single resistor (G = 1 to 1000)

ENHANCED PRODUCT FEATURES

• AD8220-EP 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
• V62/17607 DSCC Drawing Number

• Medical instrumentation
• Precision data acquisition
• Transducer interfaces

The AD8220-EP is the first single-supply, JFET input instrumentation amplifier available in an MSOP package. Designed to meet the needs of high performance, portable instrumentation, the AD8220-EP has a minimum common-mode rejection ratio(CMRR) of 77 dB at dc and a minimum CMRR of 72 dB at 5 kHz for G = 1. Maximum input bias current at 25°C is 25 pA and remains below 100 nA over the entire extended industrial temperature range. Despite the JFET inputs, the AD8220-EP typically has a noise corner of only 10 Hz.

With the proliferation of mixed-signal processing, the number of power supplies required in each system has grown. The AD8220-EP is designed to alleviate this problem. The AD8220-EP can operate on a ±18 V dual supply, as well as on a single 5 V supply. Its rail-to-rail output stage maximizes dynamic range on the low voltage supplies common in portable applications. Its ability to run on a single 5 V supply eliminates the need to use higher voltage, dual supplies. The AD8220-EP draws a maximum of 750 µA of quiescent current at 25°C, making it ideal for battery powered devices.

Gain is set from 1 to 1000 with a single resistor. Increasing the gain increases the common-mode rejection. Measurements that need higher CMRR when reading small signals benefit when the AD8220-EP is set for large gains.

A reference pin allows the user to offset the output voltage. This feature is useful when interfacing with analog-to-digital converters.

The AD8220-EP is available in an MSOP that takes roughly half the board area of an SOIC. Performance is specified over the extended industrial temperature range of −55°C to +125°C.

Additional application and technical information can be found in the AD8220 data sheet.