EVAL-ADAU1467Z
UG-1134
Rev. A (Draft) | Page 19 of 55
Figure 47. Status LEDs
AUXILIARY ADC PINS
The
has a 10-bit, successive approximation
register (SAR) ADC multiplexed across six input channels.
Channel AUXADC0 and Channel AUXADC1 are connected
to linear Potentiometer R1 and Potentiometer R2.
Channel AUXADC2 to Channel AUXADC5 are accessible
on test points next to the
. Inputs to the ADCs
between 0 V and 3.3 V can be connected to these pads and then
used in the
signal flow (see Figure 48).
Figure 48. Auxiliary ADC Test Points Communications Header
CONTROLLING VOLUME WITH A POTENTIOMETER
The 10-bit auxiliary analog-to-digital converter (ADC) on the
eliminates the need for a microcontroller in many
applications by using analog control signals as user interface
devices. For example, the EVAL-ADAU1467Z includes two 10 kΩ
linear potentiometers connected to Auxiliary ADC Channel 0
(AUXADC0) and Auxiliary ADC Channel 1 (AUXADC1).
These potentiometers can be used as an inexpensive, versatile,
and physical way to control parameters such as gain, filter
corner frequency, slew rate, and compression level.
Figure 49. Potentiometers Connected to AUXADC0 and AUXADC1
The following example procedure demonstrates how a
potentiometer can be configured as a stereo volume control.
1.
Create a new project in
, and use the
Hardware
Configuration
tab to set up the
the
DRAFT
Содержание SigmaDSP ADAU1463
Страница 44: ...UG 1134 EVAL ADAU1467Z Rev A Draft Page 44 of 55 Figure 110 EVAL ADAU1467ZLayout Top Copper D R A F T...
Страница 45: ...EVAL ADAU1467Z UG 1134 Rev A Draft Page 45 of 55 Figure 111 EVAL ADAU1467Z Layout Layer 2 Ground D R A F T...
Страница 47: ...EVAL ADAU1467Z UG 1134 Rev A Draft Page 47 of 55 Figure 113 EVAL ADAU1467Z Layout Layer 4 Power D R A F T...
Страница 48: ...UG 1134 EVAL ADAU1467Z Rev A Draft Page 48 of 55 Figure 114 EVAL ADAU1467Z Layout Layer 5 Ground D R A F T...
Страница 49: ...EVAL ADAU1467Z UG 1134 Rev A Draft Page 49 of 55 Figure 115 EVAL ADAU1467Z Layout Bottom Copper D R A F T...
