CMOS input stage — where the 1 pA bias matters
The TL072HIDDFR: The CMOS front end delivers 1 pA typical input bias current. In a high-impedance sensor front-end — a photodiode transimpedance amplifier or a pH probe buffer — that bias level means the voltage error across a 10 MΩ source resistor stays under 10 µV, negligible against the 1 mV input offset. The bias current doubles roughly every 10°C, but even at 125°C it remains in the tens of pA range, well below what a bipolar-input op-amp would leak. Supply current is 937.5 µA per channel — the dual package draws under 2 mA total. For a battery-powered data logger that runs the op-amp continuously, that quiescent draw is the floor the system sees even with no signal.
Slew rate and gain bandwidth — signal chain ceiling
20 V/µs slew rate paired with 5.25 MHz gain-bandwidth product sets the large-signal bandwidth. Below that amplitude, the small-signal -3 dB point is the GBW divided by the noise gain. A unity-gain buffer sees the full 5.25 MHz; a gain-of-10 stage rolls off at 525 kHz. The 26 mA output current per channel drives a 50 Ω load to about ±1.3 V or a 600 Ω load to ±15.6 V — adequate for driving an ADC input or a downstream stage, but not a heavy cable or a transformer-coupled line. For a 100 pF load, the phase margin is typically 45°, so a small series resistor (50-100 Ω) at the output prevents peaking in the frequency response.
TSOT-23-8 package — board-fit constraints
The TL072HIDDFR ships in a TSOT-23-8 package, a 2.9 mm × 1.6 mm body with 0.65 mm pin pitch. The SOT-23-8 footprint is standard — the same land pattern serves the LM6152ACMX/NOPB which also comes in a similar SOT-23-8 variant. No re-spin is needed if the board was laid out for that peer, though the LM6152's 80 MHz GBW and 30 V/µs slew rate are significantly faster, so the TL072HIDDFR is a drop-in replacement only if the signal bandwidth requirement is lower. In an under-hood ECU or an outdoor sensor node that sees 105°C on a summer day, the part stays within its rated junction temperature without derating.