XTR115U

@@ -0,0 +1,50 @@+# XTR115U++**Texas Instruments** · Special Purpose Amplifiers · SOIC-8++XTR115U from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VREF | output | Precision voltage reference output. 2.5V on XTR115 (4.096V on XTR116). Used to excite sensors or provide offsets. |+| 2 | IIN | input | Current input pin to the internal control amplifier (A1). The loop output current is IO = 100 x IIN. |+| 3 | IRET | input | Local ground return pin for VREG and VREF currents. Used to sense and include the regulator/reference return current in the loop output for high accuracy. |+| 4 | IO | output | Regulated 4mA to 20mA current-loop output. Connects to the external pass transistor emitter path returning to the loop negative side. |+| 5 | E | input | External NPN pass transistor emitter connection. Provides the sense/feedback point for the loop current control loop. |+| 6 | B | output | External NPN pass transistor base drive output. Driven by the internal error amplifier to regulate loop current. |+| 7 | V+ | power_in | Loop power supply input. Operating range 7.5V to 36V (absolute max 40V). |+| 8 | VREG | power_out | 5V regulator voltage output, available to power external sensor/signal-conditioning circuitry from the loop supply. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8 |+| Category | Amplifiers/Comparators |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `XTR115UU`++## CAD (KiCad official)++- Symbol: `XTR115U`+- 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:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/xtr115) (25 pp, sha256 `fb298d4a78fc8212`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **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/xtr115u-datasheet.pdf)

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