AD8224评估板

白小白_3003415

AD8224是第一单电源，JFET输入仪表放大器，16引脚、4 mm×4 mm 的LFCSP封装节省了空间。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 CMRRof 80 dB at 10 kHz for G = 1. Maximum input bias current is 10 pA and typically remains below 300 pA over the entire industrial temperature range. Despite the JFET inputs, the AD8224 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. Designed to alleviate this problem, the AD8224 can operate on a ±18 V dual supply, as well as on a single +5 V supply. The device’s railto-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 for higher voltage, dual supplies. The AD8224 draws 750 μA of quiescentcurrent 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. For a single-channel version, use the AD8220.产品特性Two channels in a small 4 mm × 4 mm LFCSPCustom 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 10 kHz, 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: 2 V/μs        
  
• 750 μA 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        
  
• ±2.25 V to ±18 V dual supply        
  
• Gain set with single resistor (G = 1 to 1000)
  

典型应用

       

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

产品图片