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Oct 19, 2022
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Style and wording tweaks #2644

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Style and wording tweaks
LizUpton Oct 14, 2022
266b522
Update dac_pro.adoc
LizUpton Oct 18, 2022
1817b80
Update dac_pro.adoc
LizUpton Oct 18, 2022
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20 changes: 9 additions & 11 deletions documentation/asciidoc/accessories/iqaudio/dac_pro.adoc
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@@ -1,23 +1,21 @@
=== Raspberry Pi DAC Pro

Our Raspberry Pi DAC Pro HAT is our highest-fidelity DAC (Digital to Analogue Converter).
The Raspberry Pi DAC Pro HAT is our highest-fidelity digital to analogue converter (DAC).

image::images/DAC_Pro_Board_Diagram.jpg[width="80%"]

With the Texas Instruments PCM5242, the DAC Pro provides outstanding Signal to Noise Ratio
and supports Balanced/Differential out in parallel to Phono/RCA line level output. It also includes a
dedicated headphone amplifier. The DAC Pro is powered by Raspberry Pi through the GPIO header.
With the Texas Instruments PCM5242, the DAC Pro provides outstanding signal-to-noise ratio (SNR)
and supports balanced/differential output in parallel to phono/RCA line-level output. It also includes a
dedicated headphone amplifier. The DAC Pro is powered by a Raspberry Pi through the GPIO header.

A careful selection of components and the layout of tracks have been at the forefront of our design in order to ensure noise immunity and the best playback of audio.

As part of the DAC Pro, two 3 pin headers (P7/P9) are exposed above the Raspberry Pi's USB and Ethernet ports for use by the optional XLR board that allows differential/balanced output.
As part of the DAC Pro, two three-pin headers (P7/P9) are exposed above the Raspberry Pi's USB and Ethernet ports for use by the optional XLR board, allowing differential/balanced output.

==== Pinouts
[cols="1,12"]
|===
| *P1* | Analogue out (0..2V RMS), carries GPIO27, MUTE signal (headphone detect), Left and Right
Audio and Left and Right Ground.
| *P6* | Headphone socket signals (pin1: LEFT, 2:GROUND, 3: RIGHT, 4:GROUND, 5:DETECT).
| *P7/9* | Differential (0..4V RMS) output (P7:LEFT, P9: RIGHT).
| *P1* | Analogue out (0-2V RMS), carries GPIO27, MUTE signal (headphone detect), left and right
audio and left and right ground.
| *P6* | Headphone socket signals (1: LEFT, 2: GROUND, 3: RIGHT, 4: GROUND, 5: DETECT).
| *P7/9* | Differential (0-4V RMS) output (P7: LEFT, P9: RIGHT).
| *P10* | Alternative 5V input, powering Raspberry Pi in parallel.
|===