Dual precision op-amp with 50 V supply headroom and 150 °C junction rating
The ADA4098-2HCPZ is a dual-channel, general-purpose precision operational amplifier from Analog Devices, specified for a supply span from 3 V to 50 V. That 50 V ceiling makes it a direct fit for industrial control loops running on 24 V or 48 V rails without needing a separate regulator — the part handles the full bus voltage. Its operating temperature range of -55 °C to 150 °C extends well beyond the usual industrial -40 °C to 125 °C envelope. This matters for designs that see sustained ambient heat — engine-bay electronics, downhole instrumentation, or power-module sense circuits sitting next to hot MOSFETs — where the junction temperature stays inside the datasheet limits even under self-heating from the 40 mA output drive.
15 µV offset and 350 pA bias — DC precision for sensor front-ends
Input offset voltage is trimmed to 15 µV typical, which keeps the DC error in a gain-of-100 stage below 1.5 mV without a nulling pot. The 350 pA input bias current is low enough that a 10 kΩ source resistor contributes only 3.5 µV of additional offset — negligible for bridge sensors or thermocouple amplifiers, though a photodiode front-end with a 1 MΩ feedback resistor sees 350 µV of bias-induced error and would prefer a FET-input part. Gain-bandwidth product is 1.05 MHz with a 0.85 V/µs slew rate. For a closed-loop gain of 10, the small-signal bandwidth is about 105 kHz — enough to condition a 20 kHz sensor signal with margin. The 40 mA output current per channel can drive a 100 Ω load to within 200 mV of the rails, so it doubles as a reference buffer or ADC driver without an extra line-driver stage.
Active production with ROHS3 compliance — no LTB pressure
Analog Devices lists the ADA4098-2HCPZ as Active (current production) and ROHS3 compliant. The 10-LFCSP (3x3) package is a standard leadless footprint with an exposed pad for thermal relief — the 3 mm × 3 mm body fits tight channel spacing on a 4-layer board.