Datasheet

2.3 PGA2505EVM Block Diagram
+
+
Microphone
Input
+48V
Preamplifier
Output
Phantom
Power
ProtectionDiodes
and
Configurable
InputCircuitry
Configurable
OutputCircuitry
PGA2505
Buffer
SN74AHCT541
ToGPOandOverRange
IndicatorsandTestPoints
DB25
PC
ParallelPort
HDR
DATA_IN
Port
HDR
DATA_OUT
Port
3 Getting Started
3.1 Electrostatic Discharge Warning
3.2 Unpacking the EVM
Getting Started www.ti.com
The primary functions of the PGA2505EVM are shown in Figure 3 . Configurable input and output circuitry
provide convenient prototype options, while the buffered host interface supports the supplied applications
software and alternate host configurations.
Figure 3. Functional Block Diagram for the PGA2505EVM
This chapter provides information about handling and unpacking the PGA2505EVM, as well as the
absolute operating conditions for the board.
Many of the components on the PGA2505EVM are susceptible to damage by electrostatic discharge
(ESD). Customers are advised to observe proper ESD handling precautions when unpacking and handling
the EVM. Failure to observe ESD handling procedures may result in damage to the EVM components.
CAUTION
Failure to observe ESD handling procedures may result in damage to the EVM.
Upon opening the PGA2505EVM package, please verify that the following items are included:
• One PGA2505EVM evaluation module
• One CD-ROM, containing the applications software and support documents
• One straight-through cable, DB25 male to DB25 female, for PC parallel port interface
• One printed PGA2505EVM Evaluation Module User’s Guide (TI literature number SBOU078 )
• One printed PGA2505 data sheet (TI literature number SBOS396 )
If any of these items are missing, please contact the Texas Instruments Product Information Center at
(972) 644–5580 to inquire about replacements.
PGA2505EVM 6 SBOU078 – June 2009
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