Using The Evaluation Board; Power Supply - Analog Devices EVAL-ADAU1861 User Manual

User Guide

USING THE EVALUATION BOARD

POWER SUPPLY

The three ways to supply power to the EVAL-ADAU1861EBZ in-
clude the following:
1. By connecting a 5 V USB cable to P1 for control port communi-
cation
2. By connecting a 12 V DC power cable to J1
3. By connecting a 12 V DC power to P22
The FTDI 4232 is powered by an on-board LDO regulator with a 3.3
V output.
In addition, the following are other power-conversion circuits on the
EVAL-ADAU1861EBZ:
Table 2. Power-Supply Jumper Setting
On-Board LDO Regulator and Internal LDO Regulator
Power Source Jumper Settings
AVDD Jump JP38 to below the AVDD pin
IOVDD Jump JP39 to below the IOVDD pin, and add a jumper
on JP42
HPVDD_L Jump JP41 to below the HPVDD_L pin
DVDD Jump JP22 to low and then jump JP40 to below the
DVDD pin on the on-board LDO regulator
Jump JP22 high and then remove the JP40 jumper on
the ADAU1861 internal LDO regulator
analog.com
A buck or boost DC-DC converter (LTC3115EDHD-1#PBF) with
►
a 7 V output.
An LDO regulator circuit (LT3042IMSE#TRPBF) that provides a
►
bias (6 V) for the external audio sources input circuit.
An LDO regulator (U38, ADP7105ARDZ) with a 5 V output that
►
provides power sources for other 5 V input circuits.
An LDO regulator (U39, ADP1715ARMZ-3.3-R7) with a 3.3 V
►
output that provides power sources for level-shift, pull-up, U2,
U3, Y3, and reset circuits.
Power-Supply
Voltage (V) Jumper Settings
1.8 Jump JP38 to the UP pin
1.8 Jump JP39 to the UP pin and add a jumper on JP42
1.3 Jump JP41 to the UP pin
0.9 Jump JP22 low and then jump JP40 to the UP pin
EVAL-ADAU1861
External
Port
P23
P24
P25
P26
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