FM8002A

@@ -0,0 +1,43 @@+# FM8002A++**Shenzhen Fuman Elec** · Audio Power OpAmps · SOP-8++FM8002A from Shenzhen Fuman Elec, in a SOP-8. Pinout and pin descriptions extracted from the datasheet (via LCSC) by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | SHUTDOWN | input | Shutdown control input. Drive high (=VDD) to disable the amplifier and drop supply current to ~4.2µA; drive low (0V) for normal operation. Requires a valid logic level (do not float); an external pull-up resistor may be used with a single-throw switch to keep it in a defined state. |+| 2 | BYPASS | passive | Internal bias reference node (VDD/2). Connect a 1.0µF bypass capacitor from this pin to GND as close as possible to the device to stabilize the internal bias voltage and improve PSRR. Larger CBY further improves PSRR. |+| 3 | +IN | input | Non-inverting analog audio input of the first op-amp stage. Typically biased at VDD/2 via the BYPASS network in the standard AC-coupled single-ended input topology. |+| 4 | -IN | input | Inverting analog audio input of the first op-amp stage. Closed-loop differential gain is set as AVD = 2×(Rf/Ri) using an external feedback resistor Rf from VO1 to this pin and an input resistor Ri from the AC-coupled audio source. |+| 5 | VO1 | output | BTL audio output 1 (output of the first, externally-set-gain op-amp). Connects to one terminal of the speaker load and to the Rf feedback network. No output coupling capacitor is required. |+| 6 | VDD | power_in | Positive supply input. Operating range 1.6V to 6V (absolute max 6V). Decouple with a 1.0µF (tantalum) capacitor to GND close to the pin. |+| 7 | GND | power_in | Device ground / power return. |+| 8 | VO2 | output | BTL audio output 2 (output of the second, internally-fixed unity-inverting op-amp, AV=-1). Drives the opposite terminal of the speaker to form a bridge-tied load, quadrupling output power vs. a single-ended output at the same supply. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shenzhen Fuman Elec |+| Package | SOP-8 |+| Category | Op-amp/Cmp |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `FM8002A`+- 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:** [Shenzhen Fuman Elec datasheet](https://datasheet.lcsc.com/datasheet/pdf/93ff929f6b4549cc91e72469b9693df5.pdf) (6 pp, sha256 `9b87e3a7f10103c6`, 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/fm8002a-datasheet.pdf)

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