AD8224BCPZ-R7

The AD8224 is the first single- supply, JFET input instrumentation amplifier available in the space- saving 16- lead, 4mm×4mm LFCSP. It requires the same board area as a typical single instrumentation amplifier yet doubles the channel density and offers a lower cost per channel without compromising performance. Designed to meet the needs of high performance, portable instrumentation, the AD8224 has a minimum common- mode rejection ratio (CMRR) of 86 dB at dc and a minimum CMRR of 80 dB at 10kHz for G = 1. Maximum input bias current is 10pA and typically remains below 300pA over the entire industrial temperature range.Despite the JFET inputs, the AD8224 typically has a noise corner of only 10Hz. With the proliferation of mixed- signal processing, the number of power supplies required in each system has grown. Designed to alleviate this problem, the AD8224 can operate on a ±18V dual supply, as well as on a single +5V supply. The device's rail- to- rail output stage maximizes dynamic range on the low voltage supplies common in portable applications. Its ability to run on a single 5V supply eliminates the need for higher voltage, dual supplies. The AD8224 draws 750μA of quiescent current per amplifier, making it ideal for battery powered devices. In addition, the AD8224 can be configured as a single- channel, differential output, instrumentation amplifier. Differential outputs provide high noise immunity, which can be useful when the output signal must travel through a noisy environment, such as with remote sensors. The configuration can also be used to drive differential input ADCs.

Applications

• Medical instrumentation
• Precision data acquisition
• Transducer interfaces
• Differential drives for high resolution input ADCs
• Remote sensors

Key features

• Two channels in a small 4mm×4mm LFCSP Custom LFCSP package with hidden paddle
• Permits routing and vias underneath package
• Allows full bias current performance
• Low input currents
• 10 pA maximum input bias current (B grade)
• 0.6 pA maximum input offset current (B grade)
• High CMRR
• 100 dB CMRR (minimum), G = 10 (B grade)
• 90 dB CMRR (minimum) to 10kHz, G = 10 (B grade)
• Excellent ac specifications and low power
• 1.5 MHz bandwidth (G = 1)
• 14 nV/Hz input noise (1 kHz)
• Slew rate: 2V/μs
• 750 A quiescent current per amplifier
• Versatility
• Rail- to- rail output
• Input voltage range to below negative supply rail
• 4 kV ESD protection
• 4.5 V to 36 V single supply
• ±2.25V to ±18V dual supply
• Gain set with single resistor (G = 1 to 1000)