LM4132 Precision Voltage Reference

@@ -0,0 +1,47 @@+# LM4132++**Texas Instruments** · Voltage Reference · SOT-23-5++The LM4132 is a precision series (3-terminal) voltage reference with 0.05% initial accuracy and low temperature coefficient. Unlike a shunt reference, it regulates its output actively with low quiescent current, providing a stable reference for ADCs, DACs, and precision measurement in fixed voltage grades.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | N/C | unconnected | No connect pin, leave floating. |+| 2 | GND | power_in | Device ground return. |+| 3 | EN | input | Enable pin. VIH ≥ 65% of VIN enables the reference; VIL ≤ 35% of VIN puts the device in shutdown (IQ_SD ≈ 3 µA typ). |+| 4 | VIN | power_in | Input supply. Operating range from VREF + 400 mV up to 5.5 V (absolute max 6 V). CIN required for stability. |+| 5 | VREF | power_out | Precision reference output. Factory-set to 1.8, 2.048, 2.5, 3, 3.3, or 4.096 V depending on grade. Sources up to 20 mA (25 mA for LM4132-3.3-Q1); COUT optional, stable with low-ESR ceramics. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Series (3-terminal) voltage reference |+| Initial accuracy | 0.05% (A grade) |+| Temperature coefficient | 10 ppm/C max |+| Output grades | 1.8 / 2.048 / 2.5 / 3.0 / 3.3 / 4.096 V |+| Supply current | 60 uA typ |+| Supply voltage | Vout + 0.4 V to 5.5 V |+| Operating temperature | -40 C to 125 C |++## Ordering variants++- `LM4132DBV`++## CAD (KiCad official)++- Symbol: `lm4132.kicad_sym`+- Footprint: `lm4132.kicad_mod`+- 3D model: SOT-23-5 body from KiCad `Package_TO_SOT_SMD/SOT-23-5`.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lm4132.pdf) (44 pp, sha256 `4bd8402ff026fdf1`, 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/lm4132-datasheet.pdf)

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