AD623

@@ -0,0 +1,52 @@+# AD623++**Analog Devices** · Instrumentation amplifier · SOIC-8++Instrumentation amplifier that takes a small differential signal, from a bridge, thermocouple, or shunt, and amplifies it against a reference, rejecting the common-mode voltage. One external resistor between the RG pins sets the gain from 1 to 1000, and the REF pin positions the output within a single supply, so it works on 3 to 12 V rails with a rail-to-rail output. It runs from a single or dual supply at low current. A standard front end for sensor bridges.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | -RG | passive | Inverting terminal of the external gain-setting resistor R_G. Connect R_G between Pin 1 and Pin 8 to set gain G = 1 + 100 kΩ/R_G (1 to 1000). Leave open for unity gain. |+| 2 | -IN | input | Inverting in-amp input. Differential input pair with Pin 3 (+IN); common-mode range extends 150 mV below -V_S. Input bias current typ 17 nA. |+| 3 | +IN | input | Noninverting in-amp input. Differential input pair with Pin 2 (-IN); common-mode range extends 150 mV below -V_S. Input bias current typ 17 nA. |+| 4 | -VS | power_in | Negative supply terminal. Connect to ground for single-supply operation (2.7 V to 12 V total) or to a negative rail for dual-supply operation (±2.5 V to ±6 V). Quiescent current 550 µA max. |+| 5 | REF | input | In-amp output reference input. Sets the DC offset of the output; drive from a low-impedance source. V_REF establishes the common-mode voltage of the output signal. |+| 6 | OUTPUT | output | In-amp output. Rail-to-rail swing; with R_L = 10 kΩ, output swings to within 0.2 V of each rail. 800 kHz small-signal bandwidth at G = 1. |+| 7 | +VS | power_in | Positive supply terminal. Total supply (+V_S to -V_S) 2.7 V to 12 V. Bypass locally with a 0.1 µF ceramic capacitor to ground. |+| 8 | +RG | passive | Noninverting terminal of the external gain-setting resistor R_G. Connect R_G between Pin 1 and Pin 8; leave open for G = 1. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Instrumentation amplifier |+| Gain | 1 to 1000 (one external resistor) |+| Supply | Single 3-12 V or dual +/-2.5 to +/-6 V |+| Output | Rail-to-rail |+| CMRR | 90 dB (min, G=1) |+| Supply current | 575 uA (max) |+| Package | SOIC-8 |++## Ordering variants++- `AD623ARZ (SOIC-8)`+- `AD623ANZ (PDIP-8)`+- `AD623ARMZ (MSOP-8)`++## CAD (KiCad official)++- Symbol: `Amplifier_Instrumentation:AD623 (KiCad official)`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## 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/AD623.pdf) (32 pp, sha256 `44f12008011b61f7`, 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/ad623-datasheet.pdf)

@@ -0,0 +1,37 @@+{+  "slug": "ad623",+  "version": "0.1.0",+  "type": "component",+  "description": "ADI single-supply instrumentation amplifier, SOIC-8. Gain set by one resistor, rail-to-rail output, 3-12 V. Datasheet-verified.",+  "tags": [+    "component",+    "amplifier",+    "instrumentation-amplifier",+    "single-supply",+    "soic-8",+    "analog-devices"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "ad623.kicad_sym",+    "ad623.kicad_mod",+    "ad623.glb",+    "ad623.step",+    "ad623.lbr",+    "docs/hero.png",+    "docs/ad623-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file