COS128UA

@@ -0,0 +1,56 @@+# COS128UA++**COSINE** · Instrumentation OpAmps · SOP-8++COS128UA from COSINE, in a SOP-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 | RG | passive | Gain-setting pin. Connect an external gain resistor R_G between pins 1 and 8 to set voltage gain per G = 1 + 50kΩ/R_G. Leave open (NC) for unity gain. |+| 2 | VIN- | input | Inverting (negative) analog signal input to the instrumentation amplifier. Diode-clamped to the supply rails; input signals swinging >0.5V beyond the rails must be current-limited to ≤10mA. |+| 3 | VIN+ | input | Non-inverting (positive) analog signal input to the instrumentation amplifier. Diode-clamped to the supply rails; input signals swinging >0.5V beyond the rails must be current-limited to ≤10mA. |+| 4 | -Vs | power_in | Negative supply rail. Accepts −2.25V to −18V (dual supply) or ground (single-supply mode with up to +36V on +Vs). Bypass to ground with a 0.1µF ceramic capacitor close to the pin. |+| 5 | REF | input | Output reference pin. Must be driven from a low-impedance source or tied to ground; sets the DC level about which V_OUT swings. Series resistance as small as 8Ω can degrade CMR to ~80dB. |+| 6 | VOUT | output | Amplifier output. Swings from (−Vs + 1.1V) to (+Vs − 1.1V), delivers ±10mA typical with V_DROPOUT < 1.2V; short-circuit current ±24mA typical. |+| 7 | +Vs | power_in | Positive supply rail. Accepts +2.25V to +18V (dual supply) or +4.5V to +36V (single supply). Bypass to ground with a 0.1µF ceramic capacitor close to the pin. |+| 8 | RG | passive | Gain-setting pin. Connect an external gain resistor R_G between pins 1 and 8 to set voltage gain per G = 1 + 50kΩ/R_G. Leave open (NC) for unity gain. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | COSINE |+| Package | SOP-8 |+| Category | Op-amp/Cmp |+| Pins | 8 |++## Ordering variants++- `COS128UACOS128U`+- `COS128UA`+- `COS128UACOS128C`+- `COS128UACOS129U`+- `COS128UACOS129UA`+- `COS128UACOS129C`+- `COS128UACOS128P`+- `COS128UACOS128PA`+- `COS128UACOS129P`+- `COS128UACOS129PA`++## CAD (KiCad official)++- Symbol: `COS128UA`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [COSINE datasheet](docs/cos128ua-datasheet.pdf) (8 pp, sha256 `e35a1a4eec057f26`, retrieved 2026-08-17, tier: lcsc)+- **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/cos128ua-datasheet.pdf)

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