The STMicroelectronics TSU112IYST is a dual-channel CMOS operational amplifier. Each channel draws 1 µA typical supply current.
9 kHz GBW and 1 µA supply — the trade-off that defines the part
This part is not for audio or high-speed loops; it is for DC or quasi-DC signals: temperature, pressure, strain, battery voltage, current-sense amplifier outputs. The 1 µA per-channel supply means a two-channel design adds 2 µA to the system budget, which is competitive with the lowest-power precision op-amps on the market. For comparison, the TS27L2IDT (also a dual CMOS op-amp from ST) offers 100 kHz GBW and 0.04 V/µs slew rate but draws roughly an order of magnitude more supply current — the TSU112IYST trades bandwidth for battery life.
Automotive qualification and extended temperature range
The 8-MiniSO package (3.00 mm body width, 0.118" pitch) is a standard surface-mount footprint shared with many ST op-amps, so board layout reuse across the TSV or TS27 families is straightforward.
Sourcing posture
The TSU112IYST is an active, current-production part from STMicroelectronics. This order code is specified into the BOM against an RFQ — no allocation risk flagged on the line.