Dual-channel precision op-amp for low-power signal chains
The LT6011AIDD#PBF from Analog Devices is a dual general-purpose operational amplifier that combines 350 kHz gain-bandwidth with a supply current of just 135 µA per channel. This makes it a fit for multi-channel sensor interfaces or battery-powered instrumentation where the power budget per amplifier is under 150 µA. Its rail-to-rail output stage preserves dynamic range when operating from a single 2.7 V supply up to 36 V, so the same part serves both 3.3 V and 24 V industrial rails without a change in BOM position.
DC precision and drift considerations for measurement front-ends
Input offset voltage is trimmed to 35 µV, and input bias current is 20 pA typical. In a 10 kΩ source impedance path, the offset and bias errors sum to about 35.2 µV at the input — negligible for a 12-bit ADC with a 2.5 V reference, but worth derating if the source impedance rises to 1 MΩ, where the bias current alone contributes 20 µV of additional offset. The 0.11 V/µs slew rate limits large-signal bandwidth: for a 10 V p-p output swing, the full-power bandwidth is about 3.5 kHz. Fast transients above that rate will produce slew-induced distortion, so this part is better suited to DC and low-frequency AC conditioning than to high-speed data acquisition.
Package, thermal path, and PCB layout notes
The 8-WFDFN with exposed pad measures 3x3 mm and requires a thermal land on the PCB. The exposed pad must be soldered to a copper plane for rated thermal performance; without it, junction-to-ambient resistance rises and the output current drive of 20 mA per channel into a heavy load will push the die temperature above the 85°C industrial limit. Supply bypass should be placed within 3 mm of each supply pin — a 0.1 µF ceramic to the thermal pad ground plane, with a 10 µF bulk capacitor nearby. The DFN package has no centre pin; the pad is the sole thermal and electrical ground connection.
Lifecycle and supply posture for BOM planning
The LT6011AIDD#PBF carries an active product status with RoHS3 compliance.