У Linear Technology (LT) новинка, претендующая на "самый-самый" в LPF (и не только), в каталог добавили только в августе этого года - LT6018 (не реклама):

Features Description
36V, Ultralow Noise,
Precision Op Amp
The LT®6018 is a 36V precision operational amplifier
with excellent noise performance. With a 0.1Hz to 10Hz
noise of only 30nVP-P, the LT6018 is an outstanding
choice for applications where 1/f noise impacts system
performance. The LT6018 has excellent DC performance
with a maximum offset voltage of 50µV and a maximum
offset voltage drift of 0.5µV/°C. The input offset voltage
remains low over the entire common-mode input range,
providing a minimum CMRR of 124dB. Open loop gain
is typically 142dB enabling the part to achieve linearity
better than 1ppm. The proprietary circuit topology of the
LT6018 provides excellent slew rate and settling time
without compromising noise or DC precision.
An enable pin allows the LT6018 to be put in a low power
shutdown mode, reducing the typical supply current to
only 6.2µA. A reference pin for the enable pin is also
provided, which simplifies the interface between external
circuitry and the LT6018.

n Ultralow Voltage Noise
n 30nVP-P Noise: 0.1Hz to 10Hz
n 1.2nV/√Hz Typical at 1kHz
n Maximum Offset Voltage: 50μV
n Maximum Offset Voltage Drift: 0.5μV/°C
n CMRR: 124dB (Minimum)
n AVOL: 132dB (Minimum)
n Slew Rate: 30V/μs
n Gain-Bandwidth Product: 15MHz
n Wide Supply Range: 8V to 33V
n Ultralow THD: –115dB at 1kHz
n Unity Gain Stable
n Low Power Shutdown: 6.2µA
n SOIC-8E and 4mm × 3mm 12-Lead DFN Packages
n 4.5kV HBM and 2kV CDM Tolerant

Applications
n ADC Driver Applications
n Low Noise Precision Signal Processing
n Multiplexed Applications
n DAC Buffer
n Precision Data Acquisition
n Active Filters
n Professional Audio