Evaluation Board Hardware; Power Supplies - Analog Devices UG-284 User Manual

Evaluation Board User Guide

EVALUATION BOARD HARDWARE

POWER SUPPLIES

IOVDD5
FOR
2
I C/SPI
IOVDD2
FOR
DAI B
IOVDD1
FOR
DAI A
IOVDD4
FOR
DMIC
IOVDD3
FOR
DAI C
The evaluation board requires an external 5 V dc power adapter
plugged into J34. This 5 V dc input drives the on-board LDOs
to generate 1.5 V, 1.8 V, 2.4 V, 3.3 V, or 3.6 V, which feeds into
the ADAU1373 and other on-board circuits. The power
supplies the ADAU1373 requires are listed in Table 1.
Table 1. ADAU1373 Power Supplies
Power Supply
AVDD
HPVDD
SPKVDD
DVDD
IOVDD1 to IOVDD5
If voltages other than the default LDO output are needed, external
power supplies can be used for this purpose. Each power supply
for the ADAU1373 has a set of jumpers to select the LDO
output or external power supply.
J31 is for AVDD power supply selection. The selection options
are shown in Table 2.
Table 2. J31
Jumper
Position Function
On On-board LDO-generated 1.8 V connected to AVDD
Off External power supply connected to Test Pin AVDD
and Test Pin GND
J33 is for HPVDD power supply selection. The selection table is
shown in Table 3.
5V DC INPUT
Figure 3. Power Supply
LDO Voltage
1.8 V
1.8 V
3.6 V
1.5 V
1.8 V, 2.4 V, or 3.3 V
HPVDD
Table 3. J33
Jumper
Position Function
On On-board LDO-generated 1.8 V connected to
HPVDD
Off External power supply connected to Test Pin HPVDD
and Test Pin GND
J32 is for DVDD power supply selection. The selection options
are shown in Table 4.
Table 4. J32
Jumper
Position Function
On On-board LDO-generated 1.5 V connected to DVDD
Off External power supply connected to Test Pin DVDD
and Test Pin GND
J40 is for SPKVDD power supply selection. The selection
options are shown in Table 5.
Table 5. J40
Jumper
Position Function
On On-board LDO-generated 3.6 V connected to
SPKVDD
Off External power supply connected to SPKVDD: J41
for SPKVDD and J42 for GND
J43 is for IOVDD1 power supply selection, which powers
Digital Audio Interface A. The selection options are shown in
Table 6.
Rev. 0 | Page 5 of 24
UG-284
SPKVDD
DVDD
AVDD