component
pam8404kgr
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Diodes Incorporated Audio Power OpAmps, QFN-20-EP(4x4). Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownPAM8404KGR
Diodes Incorporated · Audio Power OpAmps · QFN-20-EP(4x4)
PAM8404KGR from Diodes Incorporated, in a QFN-20-EP(4x4). 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 | G1 | input | Gain select MSB. Together with G0 selects closed-loop gain of 6/12/18/24 dB (2/4/8/16 V/V). Internal 300kΩ pull-down in the QFN package. |
| 2 | OUTL+ | output | Left channel positive differential Class-D H-bridge output. Drives the + terminal of the left speaker (typ. 4Ω or 8Ω) with a ~300 kHz PWM signal. |
| 3 | PVDD | power_in | Power-stage supply for the output H-bridges (2.5V to 5.5V). Must be tied to the same rail as AVDD. Decouple with 1µF ceramic close to the pin and a bulk 10µF nearby. |
| 4 | PGND | power_in | Power ground return for the output H-bridges. Route separately from AGND back to system ground to keep Class-D switching currents out of the analog path. |
| 5 | OUTL- | output | Left channel negative differential Class-D H-bridge output. Drives the − terminal of the left speaker as a BTL pair with OUTL+. |
| 6 | NC | unconnected | Not connected. Leave floating or tie to ground; no internal connection. |
| 7 | /SDL | input | Left channel shutdown, active low. Pulling to GND puts the left channel into low-power shutdown (ISD < 1µA). Drive high (or to VDD) for normal operation. |
| 8 | /SDR | input | Right channel shutdown, active low. Pulling to GND puts the right channel into low-power shutdown (ISD < 1µA). Drive high (or to VDD) for normal operation. |
| 9 | AVDD | power_in | Analog supply for the input stage and bias circuitry (2.5V to 5.5V). Must be tied to the same rail as PVDD. Decouple with 1µF close to the pin and a 10µF bulk capacitor nearby. |
| 10 | NC | unconnected | Not connected. Leave floating or tie to ground; no internal connection. |
| 11 | OUTR- | output | Right channel negative differential Class-D H-bridge output. Drives the − terminal of the right speaker as a BTL pair with OUTR+. |
| 12 | PGND | power_in | Power ground return for the output H-bridges (tie to pin 4). Route separately from AGND back to system ground to isolate Class-D switching currents. |
| 13 | PVDD | power_in | Power-stage supply for the output H-bridges (tie to pin 3, 2.5V to 5.5V). Must be same rail as AVDD. Decouple with 1µF ceramic close to the pin. |
| 14 | OUTR+ | output | Right channel positive differential Class-D H-bridge output. Drives the + terminal of the right speaker with a ~300 kHz PWM signal. |
| 15 | G0 | input | Gain select LSB. Together with G1 selects closed-loop gain of 6/12/18/24 dB. Internal 300kΩ pull-down in the QFN package. |
| 16 | INR+ | input | Right channel positive audio input. AC-couple through CI (typ. 0.22µF) to the source; input impedance depends on gain setting (5.2-28.1kΩ). |
| 17 | INR- | input | Right channel negative audio input. AC-couple through CI (typ. 0.22µF); for single-ended sources tie to signal ground through a matching capacitor. |
| 18 | AGND | power_in | Analog ground reference for the input stage and bias. Route as quiet ground for signal components; tie to system ground at a single point separate from PGND. |
| 19 | INL- | input | Left channel negative audio input. AC-couple through CI (typ. 0.22µF); for single-ended sources tie to signal ground through a matching capacitor. |
| 20 | INL+ | input | Left channel positive audio input. AC-couple through CI (typ. 0.22µF) to the source; input impedance is gain-dependent (5.2-28.1kΩ). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | QFN-20-EP(4x4) |
| Category | Op-amp/Cmp |
| Pins | 20 |
Ordering variants
PAM8404KGRPAM8404KGRZER
CAD (KiCad official)
- Symbol:
PAM8404KGR - Footprint:
Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm - 3D model: QFN-20-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
pam8404kgr-etched.step/pam8404kgr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pam8404kgr.step/pam8404kgr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (None pp, sha256
7f94eeb297192eb9, 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).
Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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