Micropower op-amp

Sub uA

The sub-uA devices GBP is rather low: 3.5 to 14 KHz

The Analog Devices AD8502 precision CMOS op amp operates with a supply current typically below 1 μA
Maxim MAX4470 operates with a 750 nA supply current
STMicroelectronics TSU101 requires 580 nA (typical).
ROHM Semiconductor BU7265 requires only 350 nA in normal operation and features an input bias current as low as 1 pA (typical).
Intersil ISL28194 typical current of only 330 nA. Furthermore, the part includes a shutdown pin that brings power consumption down to 2 nA in this ultra-low-power mode.
Touchstone Semiconductor TS1003 op amp single-supply voltage as low as 0.8 V. typical supply current of only 600 nA and features an input bias current as low as 2 pA
TI OPA369 op amps feature noise as low as 3.6 µVp-p (0.1 to 10 Hz) with 1.8 V RRIO operation and 800 nA supply current.