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Updated Differences Between H1 and H2 models (markdown)

euquiq 2020-06-18 18:11:00 -03:00
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Differences-Between-H1-and-H2-models.md

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At a glance, hardware-side, both models feature a **headphone connector** and the same **AK4951 AUDIO / CODEC IC** (You can get the datasheet [following this link](https://www.akm.com/content/dam/documents/products/audio/audio-codec/ak4951aen/ak4951aen-en-datasheet.pdf)). At a glance, hardware-side, both models feature a **headphone connector** and the same **AK4951 AUDIO / CODEC IC** (You can get the datasheet [following this link](https://www.akm.com/content/dam/documents/products/audio/audio-codec/ak4951aen/ak4951aen-en-datasheet.pdf)).
The AK4951 includes separate pins for speaker and headphone output.
Upon close inspection, several differences arise: Upon close inspection, several differences arise:
## Audio in H2 model ## Audio in H2 model
Portapack H2 circuitboard includes a connector header for easily adding an internal speaker. Portapack H2 circuitboard includes a connector header for easily adding an internal speaker.
The **AK4951 IC** is rotated 180º and placed more into the middle of the circuit board, allowing for the addition of an extra IC: The **CS8122S** ultra-low EMI, filter-free, class-D amplifier, for driving the speaker output with up to 3W. The **AK4951 IC** is rotated 180º and placed more into the middle of the circuit board, allowing for the addition of an extra IC: The ChipStar brand **CS8122S** ultra-low EMI, filter-free, class-D amplifier, for driving the speaker output with up to 3W.
The speaker audio header is switched on/off by the headphone female connector, which includes the usual switch, detecting the insertion of a male plug in it. The speaker audio header is switched on/off by the headphone female connector, which includes the usual switch, detecting the insertion of a male plug in it.
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The soldering pads for an internal speaker connector header are present. The speaker +/GND signals on the pad are routed into AK4951 pins 20 (SPP) and 19 (SPN) which are labeled as SPeaker Positive and SPeaker Negative. The soldering pads for an internal speaker connector header are present. The speaker +/GND signals on the pad are routed into AK4951 pins 20 (SPP) and 19 (SPN) which are labeled as SPeaker Positive and SPeaker Negative.
**NOTE:** _There is no extra amplifier IC between the speaker pad and the AK4951. The AK4951 includes a 1W, 8ohm Speaker amplifier_ **NOTE:** _There is no extra amplifier IC between the speaker pad and the AK4951. The AK4951 includes a speaker amplifier capable of 1W, when powered @5v._