Evaluation Board User Guide
UG-600
line input application, take the following
steps:
1.
J9 is used to level shift the input source to the VBAT/2
level.
2.
, connect the analog audio source to the
J9 auxiliary input connector.
3.
J2 has two jumpers that must be set to the
VBAT
and
VBAT2
positions.
4.
Check the dc voltage at J2 (Pin 2). This voltage should be
approximately 7 V. If not, set J2 using the preset R5.
5.
Set the S10, S16, S21, and S26 switches to the
ON
position
for dc-coupled inputs.
6.
Set Jumpers J15, J20, J27, J30, J36, J40, J46, and J49 to the
BUFF
position.
7.
Alternatively, the signal source can be connected directly to
J17, J28, J38, and J47 by setting Jumpers J15, J20, J27, J30,
J36, J40, J46, and J49 to the –
IN
or
+IN
position. Note that
in this setting, the input source must be level shifted
appropriately.
line input applications, take the
following steps:
1.
Ensure Jumper J15 and Jumper J20 are set to the
–IN
and
+IN
position for Ch1.
2.
Ensure Jumper J27 and Jumper J30 are set to the
–IN
and
+IN
position for Ch2.
3.
Ensure Jumper J36 and Jumper J40 are set to the
–IN
and
+IN
position for Ch3.
4.
Ensure Jumper J46 and Jumper J49 are set to the
–IN
and
+IN
position for Ch4.
5.
Ensure Switches S10, S16, S21, and S26 are set to the
OFF
, which
sets the inputs as ac-coupled mode.
microphone input application, take the
following steps:
1.
Ensure Switches S7, S12, S15, S18, S20, S23, S25, and S29
are set to the
ON
as microphone.
2.
These switches are used to set the microphone bias
resistors for the microphone inputs. Either 300 Ω or 500 Ω
can be selected when switches are set to the
ON
position
for the respective inputs.
3.
Ensure Jumpers J22, J31, J41, and J51 are set to the
INT
position (the internal micbias is used). These jumpers
allow the microphone bias to be selected either from the
, or externally, if desired.
4.
Jumpers J17, J28, J38, and J47 are used for the microphone
input connection.
5.
Ensure Jumpers J15, J20, J27, J30, J36, J40, J46, and J49 are
set to the
IN
position.
6.
Ensure Switches S10, S16, S21, and S26 are set to the
ON
position for direct-coupled mode.
USBi AND STANDALONE GUI SETUP
To set up the USBi and standalone GUI, take the following steps:
1.
If using the standalone GUI, click the appropriate
x86
or
x64
folder
setup.exe
to install the GUI.
2.
The software is installed on your desktop with the
ADAU1977 Rev C
icon.
To power-on the
, take the following steps:
1.
Turn on the 5 V supply. Typical 40 mA current is drawn
from the 5 V supply in standby condition.
STANDALONE GUI I
2
C CONTROL
board can be controlled via the I
2
C
using the standalone GUI and USBi. Take the following steps:
1.
Connect the provided USBi board to J8 and to the USB
port on the PC.
2.
Double-click the
ADAU1977 Rev C
icon on your desktop
to invoke the GUI.
3.
A new window, as is shown in Figure 3, will appear.
4.
The
USBi - Connected
message will appear at the top of
the window (see Figure 3).
5.
Click
Power Up
. The
Communication Established
message will appear at the top of the window (see Figure 3).
6.
Click
Read all
to read the PLL status. The PLL status
should be green and locked.
7.
, and the boost converter is
turned on, the
Boost Good
indicator should be green. For
the
, this function is not
applicable and will stay red.
8.
Go to the
ADC Control
tab (see Figure 4) and click
Master/Slave
for the ADC master mode. When green, the
ADC is in master mode and it will output the bit clock and
frame clock, together with the serial data at the J25.
9.
Connect the input source at the desired input to AIN1,
AIN2, AIN3, and AIN4 or AUXIN using 3.5 mm audio
jacks. Alternatively, the 2-pin (0.1” pitch) header can be
used to feed the inputs to the
evaluation board. Note that the input level requirements
for the
, the
, and the
are different, and the appropriate level input signal must be
applied. The full-scale inputs for the
is 4.5 V rms.
10.
The ADC output is available at the J26 header or the SPDIF
output depending on the selected option.
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