LPA4890MSF

@@ -0,0 +1,47 @@+# LPA4890MSF++**LOWPOWER** · Audio Power OpAmps · MSOP-8++LPA4890MSF from LOWPOWER, in a MSOP-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 | SHUTDOWN | input | Active-low shutdown control. Driving this pin below ~0.4V places the device in ultra-low-current (0.1µA typ) shutdown mode; driving above ~1.4V enables normal operation. Compatible with 0.4V logic thresholds. |+| 2 | BYPASS | passive | Bypass capacitor pin providing the internal VDD/2 common-mode reference voltage. Connect a bypass capacitor (typically 0.2µF-4.7µF) from this pin to GND; larger capacitance improves PSRR and reduces pop noise. |+| 3 | +IN | input | Non-inverting (positive) audio input of the first amplifier. Receives the internal common-mode voltage (VDD/2) via the BYPASS reference; used for single-ended or differential input configuration. |+| 4 | -IN | input | Inverting (negative) audio input of the first amplifier. Receives the audio input signal via the input coupling capacitor and input resistor Rin, and connects to the feedback resistor Rf that sets closed-loop gain. |+| 5 | VO1 | output | Negative BTL output of the LPA4890. Connects to one terminal of the load speaker and to the feedback resistor Rf that closes the gain loop around the first amplifier. |+| 6 | VDD | power_in | Analog supply input, 2.5V to 5.5V operating range (6V absolute max). Bypass locally with a 1µF ceramic decoupling capacitor to GND. Quiescent current is 2.5mA typ at 5.5V. |+| 7 | GND | power_in | Ground return for all circuitry. Should be tied to a solid ground plane; keep the return path short and low-impedance for best THD+N and PSRR. |+| 8 | VO2 | output | Positive BTL output of the LPA4890. Connects to the other terminal of the load speaker, forming a bridge-tied-load together with VO1 (no output coupling capacitor required). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | LOWPOWER |+| Package | MSOP-8 |+| Category | Op-amp/Cmp |+| Pins | 8 |++## Ordering variants++- `LPA4890MSFMSF`++## CAD (KiCad official)++- Symbol: `LPA4890MSF`+- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`+- 3D model: MSOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [LOWPOWER datasheet](docs/lpa4890msf-datasheet.pdf) (10 pp, sha256 `39fbf37faef97cac`, 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/lpa4890msf-datasheet.pdf)

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