Analog Input And Output - Analog Devices UG-284 User Manual

Evaluation Board User Guide

ANALOG INPUT AND OUTPUT

On the board, there are four analog inputs (J4, J5, J8, and J9).
Near each input, there is a three-way jumper that selects which
bias voltage is routed to this input pair. These jumpers are J2, J3,
J6, and J7. The configurations are shown in Figure 9, and the
definitions of these jumper configurations are listed in Table 15,
Table 16, Table 17, and Table 18, respectively.
MICB2
MICB1
POSITION A
Figure 9. Configuration for Jumpers J2, J3, J6, and J7
Table 15. J2
Position Function
A Microphone Bias 1 connected to Analog Input 1
B Microphone Bias 2 connected to Analog Input 1
Table 16. J3
Position Function
A Microphone Bias 1 connected to Analog Input 2
B Microphone Bias 2 connected to Analog Input 2
ANALOG
INPUT 4
Figure 8. Analog Input and Output Interface
MICB2
MICB1
POSITION B
Rev. 0 | Page 9 of 24
ANALOG ANALOG ANALOG
INPUT 3 INPUT 2 INPUT 1
Table 17. J6
Position Function
A Microphone Bias 1 connected to Analog Input 3
B Microphone Bias 2 connected to Analog Input 3
Table 18. J7
Position Function
A Microphone Bias 1 connected to Analog Input 4
B Microphone Bias 2 connected to Analog Input 4
On the board, there are two analog outputs (J10 and J11),
one earpiece output for mono differential signals (J18), one
headphone output (J12), and two pairs of speaker outputs
(J13/J14 and J15/J16).
UG-284
EARPIECE
OUTPUT
ANALOG
OUTPUT 1
ANALOG
OUTPUT 2
HEADPHONE
OUTPUT
SPEAKER
OUTPUT