Microchip Technology OS81210, Руководство пользователя

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OS81214 Slim Auxiliary I/O Board
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2017 Microchip Technology Inc. DS60001523A-page 27
4.4 BOARD DETAILS
4.4.1 Electrical Characteristics
4.4.2 Microphone Power
The OS81214 Slim Auxiliary I/O Board supports standard electret microphones that
need a bias voltage.
Figure 4-3 shows the pin assignment on the 3.5 mm stereo plug.
4.4.3 Connectors
The OS81214 Slim Auxiliary I/O Board provides the following connectors:
• One ePHY connector
• One Configuration/Debug Header connector
• Three audio sockets
For information on the electrical and Configuration/Debug Header connectors refer to
Section 2.4.2 . The audio socket connectors are described in Section 4.4.3.1 .
4.4.3.1 AUDIO SOCKET
The OS81214 Slim Auxiliary I/O Board provides the following audio socket connectors:
Parameter Min. Typ. Max. Unit
Board Current Consumption at — 70 — mA
Board Operating Voltage 9 12 15 V
Headphone Output Power (R
L
= 16 Ω ) 30 35 40 mW ( RMS )
Line In Voltage — — 1 V (RMS)
Microphone Input Voltage — — 35 mV (RMS)
Microphone DC Bias — 3.3
1
— V
Note 1: Through 2.2 k Ω resistor. For details refer to Section 4.4.2 .
FIGURE 4-3: PIN ASSIGNMENT OF STEREO PLUG
1: Signal input
2: 3.3 V through 2.2 k
Ω resistor
3: GND
Headphone socket type: SJ-3524-SMT-TR-GR, standard jack, stereo, 3.5 mm,
green, from CUI Inc.
Line In socket type: SJ-3524-SMT-TR-BE, standard jack, stereo, 3.5 mm,
blue, from CUI Inc.
Microphone socket type: SJ-3524-SMT-TR-PI, standard jack, stereo, 3.5 mm,
pink, from CUI Inc.
Suitable counter-piece: SP-3501, stereo plug, 3.5 mm male, from CUI Inc.
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