Pin-to-pin compatible replacements

Document created by analog-archivist Employee on Feb 23, 2016
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Customer used:
a) ADA4899-1YCPZ - Unity-Gain Stable, Ultralow Distortion, 1 nV/√Hz Voltage
Noise, High Speed Op Amp 
b) AD8139ACPZ - Low Noise, Rail-to-Rail, Differential ADC Driver 
in his design but they are urgently looking for lower power replacements. 

They can scarify a lot of speed but package has to remain the same (PCB design
is closed) and also 12V power supply is a must. 
Are you able to recommend anything for customer?


a) There is no pin-to-pin compatible low power op amp replacement for the
ADA4899-1YCPZ in the Analog Devices portfolio. 

b) Regarding the low power replacement part for the AD8139ACPZ, can you kindly
provide me some more information about the required minimum ENOB, the input
signal (amplitude, frequency, single-ended/differential), gain and feedback
loop (Resistor values) incl Output low-pass filter (Order, cut-off