REF2033

@@ -0,0 +1,49 @@+# REF2033++**Texas Instruments** · Voltage reference · SOT-23-5++Voltage reference that puts out two related voltages: a precise 3.3 V VREF and a VBIAS pin that tracks at exactly half of it. That midscale bias is what a bidirectional current-sense or bipolar ADC signal path needs for its zero point, and because VBIAS tracks VREF over temperature the two stay matched without a divider. It holds low initial error and low drift, and drives both outputs from a small SOT-23-5. A one-chip reference-plus-midscale for level-shifted and bidirectional measurement.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VBIAS | output | Bias voltage output equal to VREF/2 (1.65 V for REF2033). Can source and sink up to ±20 mA and tracks VREF over temperature. |+| 2 | GND | power_in | Device ground return. |+| 3 | EN | input | Active-high enable. Device is enabled when EN >= VIN - 0.7 V; shutdown when EN <= 0.7 V. Shutdown supply current is typically 3.3 uA. |+| 4 | VIN | power_in | Input supply voltage, VREF + 0.02 V to 5.5 V (absolute max 6 V). Quiescent current typ 360 uA in active mode. |+| 5 | VREF | output | Primary reference voltage output (3.3 V for REF2033). Sources/sinks up to ±20 mA with 10 mV typical dropout; stable with 0-10 uF output capacitance. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Dual-output voltage reference |+| VREF | 3.3 V |+| VBIAS | VREF/2 (tracking) |+| Initial accuracy | +/-0.05% to 0.1% |+| Temp drift | 8 ppm/C (max) |+| Supply | VREF + 0.2 V to 5.5 V |+| Package | SOT-23-5 |++## Ordering variants++- `REF2033AIDDFR (SOT-23-5)`+- `REF2030AIDDFR (3.0 V variant)`+- `REF2025AIDDFR (2.5 V variant)`++## CAD (KiCad official)++- Symbol: `Reference_Voltage:REF2033 (KiCad official)`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/ref2033.pdf) (37 pp, sha256 `b79fc315c8fa1a6c`, 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/ref2033-datasheet.pdf)

@@ -0,0 +1,37 @@+{+  "slug": "ref2033",+  "version": "0.1.0",+  "type": "component",+  "description": "TI dual-output voltage reference, SOT-23-5. 3.3 V VREF plus a tracking VBIAS at VREF/2, low drift. Datasheet-verified.",+  "tags": [+    "component",+    "reference",+    "voltage-reference",+    "bidirectional",+    "sot-23-5",+    "texas-instruments"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "ref2033.kicad_sym",+    "ref2033.kicad_mod",+    "ref2033.glb",+    "ref2033.step",+    "ref2033.lbr",+    "docs/hero.png",+    "docs/ref2033-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file