AD22050/AD22057 Offset Difference Amplifier

Application

This circuit shows the AD22050N as a two-stage difference amplifier for translating a small input difference into a conditioned single-ended output.

Schematic

The input and supply sources are arranged in one source row with a shared lower return bus. A1OUT is visibly looped back to A2IN, OFFSET is tied to the same reference bus, and the output drives RLOAD on the right.

Design Context

VIN+ is 1.10 V and VIN- is 1.00 V, giving a 100 mV input difference with a 1.05 V common-mode level. OFFSET is grounded so the measured output is referenced to the common return.

Expected Behavior

The operating-point table should show the two input levels and a single-ended output that responds to the input difference through the cascaded AD22050N signal path.

Key Values

• VCC / VEE: +15 V and -15 V.
• Inputs: 1.10 V and 1.00 V.
• OFFSET: tied to the common return.
• RLOAD: 10 kOhm.

Suggested Experiments

• Raise VIN+ by 50 mV and confirm Vout moves in the same direction.
• Drive OFFSET from a nonzero reference to shift the output baseline.
• Increase RLOAD loading and inspect whether the output operating point changes.

Featured Component

U1 is the AD22050N Difference Amplifier. IN+ and IN- sense the differential input, A1OUT feeds A2IN for the cascaded signal path, OFFSET defines the baseline, and OUT drives the measured load.