pHAT Module Series
pHAT-HIFI Technical Description
pHAT-HIFI Technical Description
Page 11 of 20
3.5
Audio Interfaces
3.5.1
Speaker Terminals
The pHAT-HIFI provides two [2] 4 ~ 8
Ω
(ohm) impedance 3.5mm pitch pluggable speaker
terminals that should be connected to left and right hand speakers using suitable 2 core cable.
Table 3: Speaker Terminals
Terminal Name
I/O
Description
Comment
LEFT SPEAKER
CLASS C
Left Speaker output
4 ~ 8
Ω
RIGHT SPEAKER
CLASS C
Right Speaker output
4 ~ 8
Ω
3.5.2
Line Output Connection
The pHAT-HIFI provides three [3] PCB pads for stereo line level output from the DAC,
identified as ‘L’ left, ‘R’ right and ‘GD’ ground. These pads can be wired to an external
amplifier line input connection.
Table 4: Line Output Connection
Pad Name
I/O
Description
Comment
L
1k
Ω output
Left line level output
2.1Vrms
R
1k
Ω output
Right line level output
2.1Vrms
GD
Signal Ground
