# ADA4522

**Analog Devices** · Operational Amplifier · SOIC-8

The ADA4522-1 is a single zero-drift operational amplifier that pairs low input offset (5 uV max) and near-zero drift with a wide supply range up to 55 V and low broadband noise. Its combination of precision and high-voltage operation suits demanding bridge, current-sense, and instrumentation front ends that run from higher rails.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | NIC | unconnected | Not internally connected. Leave floating or optionally tie to a stable potential; no internal die connection. |
| 2 | -IN | input | Inverting input of the op amp. Ground-sensing input; input voltage range extends from V- (ground on single supply) to (V+) - 1.5 V. |
| 3 | +IN | input | Noninverting input of the op amp. Ground-sensing input; input voltage range extends from V- (ground on single supply) to (V+) - 1.5 V. |
| 4 | V- | power_in | Negative supply voltage. Single-supply operation: connect to GND (V+ = 4.5 V to 55 V). Dual-supply operation: -2.25 V to -27.5 V referenced to ground. |
| 5 | NIC | unconnected | Not internally connected. Leave floating or optionally tie to a stable potential; no internal die connection. |
| 6 | OUT | output | Op amp output. Rail-to-rail output; drives 10 kΩ loads to within millivolts of either supply rail. |
| 7 | V+ | power_in | Positive supply voltage. Total supply range 4.5 V to 55 V (single) or ±2.25 V to ±27.5 V (dual). Bypass with a local 0.1 µF ceramic to V-/GND close to the pin. |
| 8 | NIC | unconnected | Not internally connected. Leave floating or optionally tie to a stable potential; no internal die connection. |

## Key specifications

| Parameter | Value |
|---|---|
| Type | Single zero-drift op-amp |
| Input offset voltage | 5 uV max |
| Offset drift | 0.022 uV/C typ |
| Gain-bandwidth product | 2.7 MHz typ |
| Input noise | 5.8 nV/sqrt(Hz) |
| Supply voltage | 4.5 V to 55 V |
| Operating temperature | -40 C to 125 C |

## Ordering variants

- `ADA4522ARMZ`
- `ADA4522ARZ`
- `ADA4522ARZ-2`
- `ADA4522ARMZ-2`
- `ADA4522ARZ-4`
- `ADA4522ARUZ-4`

## CAD (KiCad official)

- Symbol: `ada4522.kicad_sym`
- Footprint: `ada4522.kicad_mod`
- 3D model: SOIC-8 body from KiCad `Package_SO/SOIC-8_3.9x4.9mm_P1.27mm`.
- 3D model files: `ada4522-etched.step` / `ada4522-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ada4522.step` / `ada4522.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/ADA4522-1_4522-2_4522-4.pdf) (48 pp, sha256 `a97ba626399a0e7d`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ada4522-datasheet.pdf)