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Current consumption of AD8138 with Gain around 20dB

Question asked by Dwij on Dec 19, 2012
Latest reply on Jan 15, 2013 by AnnaFeB


I am planning to use AD8138 tIo drive 500ohm load. I am using value of RF=5.2k and Rg=249 to give around 26dB gain [20log(5200/249)]. In the datasheet quiescent current is mentioned around 20mA.


Is this current measured with NO Load? If device is loaded with 500 ohm differential load then what would be current consumption for 5V and +/- 5V supply? What would be current consumption at 50ohm differential load for 5V and +/-5V supply? Consider output swing is 2Vp-p differential.


Can I use device with +/- 2.5V supply?