opa551ua

@@ -0,0 +1,54 @@+# OPA551UA++**Texas Instruments** · Operational Amplifier · SOIC-8++OPA551UA 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 | V- | power_in | Negative (lowest) power supply. Operating supply range ±4 V to ±30 V (8 V to 60 V between rails). Pins 1, 4, and 5 are internally connected for improved thermal performance; pin 4 must carry the primary V- supply current, pins 1 and 5 should be connected to a thermal mass rather than used as feedthroughs to V-. |+| 2 | -IN | input | Inverting op-amp input. Common-mode range (V-)+2.5 V to (V+)-2.5 V; input bias current ±20 pA typ (±100 pA max). Internal clamp diodes protect against voltages beyond the rails; external input current must be limited to 5 mA. |+| 3 | +IN | input | Noninverting op-amp input. Common-mode range (V-)+2.5 V to (V+)-2.5 V; input bias current ±20 pA typ. Internal clamp diodes protect against voltages beyond the rails; external input current must be limited to 5 mA. |+| 4 | V- | power_in | Negative (lowest) power supply - primary current carrier for V-. Operating supply range ±4 V to ±30 V (8 V to 60 V total between rails). Bypass with 0.1 µF (and 10 µF) capacitor near the pin. |+| 5 | V- | power_in | Negative (lowest) power supply. Internally tied to pins 1 and 4 for improved thermal performance. Should be connected to a thermal mass rather than used as a PCB feedthrough for V-. |+| 6 | Out | output | Amplifier output. Swings to within ~2 V of the rails at 10 mA and ~3 V of the rails at 200 mA. Continuous output current up to ±200 mA; short-circuit current limited to approximately ±380 mA. Stable driving capacitive loads (see Figure 19 for allowed CL vs. gain). |+| 7 | V+ | power_in | Positive (highest) power supply. Operating supply range ±4 V to ±30 V (8 V to 60 V total between rails). Quiescent current ±7 mA typ (±8.5 mA max). Bypass with 0.1 µF (and 10 µF) capacitor near the pin. |+| 8 | Flag | output | Thermal-shutdown indicator (current-source output). Sources ~50 nA (1 µA max) during normal operation and 80-160 µA (120 µA typ) when the die exceeds ~160 °C and enters thermal shutdown (resets at ~140 °C). Compliance range V- to (V+)-1.5 V; an external pull-down resistor converts the current to a logic-level signal. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8 |+| Category | Op-amp/Cmp |+| Pins | 8 |++## Ordering variants++- `OPA551UA`+- `OPA551UA/2K5`+- `OPA551UAE4`+- `OPA551UAPAG4`+- `OPA551UAFA/500`+- `OPA551UAFA/500G3`+- `OPA551UAFAKTWT`+- `OPA551UAFAKTWTG3`++## CAD (KiCad official)++- Symbol: `OPA551UA`+- 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/lit/ds/symlink/opa551ua.pdf) (None pp, sha256 `bc4b2856546ba466`, 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/opa551ua-datasheet.pdf)

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