Datasheet

Hardware Guide
2.1 Power Supplies
The PGA4311-EVM includes a power supply connector, labeled J4 on the circuit board. Four locking
terminals are provided for the analog power supplies (VA+ and VA–), a digital power supply (VD+),
and a common ground (GND). There are two configuration modes for the power supplies: Three-
Supply operation and Two-Supply operation.
In the case of Three-Supply operation, jumper J1 is installed while jumper J2 is an open circuit.
Separate supplies are required for VD+, VA+, and VA–. The supplies share a common ground
connection at the GND terminal. Table 1 shows the supply configuration details.
Table 1. Requirements for Three-Supply Operation.
Supply Recommended Supply
Designator Supply Voltage Voltage Range
VD+ +5V +4.5V to +5.5V
VA+ +5V +4.5V to +5.5V
VA––5V –4.5V to –5.5V
2-2
NOTE: Install jumper at J1. Remove jumper from J2 (open circuit).
In the case of Two-Supply operation, jumpers are installed at both J1 and J2. The J2 jumper
connects the VA+ terminal to the VD+ terminal, with VA+ providing both the positive analog and
digital supplies. Separate supplies are required for VA+ and VA-. The supplies share a common
ground connection at the GND terminal. Table 2 shows the supply configuration details.
2.2 PC Parallel Port Interface
The evaluation module includes a DB-25 connector, labeled J5, which is used to interface the
PGA4311-EVM with a PC parallel (printer) port. The evaluation module software utilizes the parallel
port to communicate with the PGA4311’s serial interface. An interface cable is supplied as part of
the evaluation module package.
2.3 DATA IN and DATA OUT Headers
Two 14-pin headers are included on the evaluation module. They are labeled DATA IN and DATA
OUT. The DATA IN header provides an alternative connection for host communications with the
PGA4311’s serial interface. It also provides a means for interfacing to another PGA4311-EVM when
using a daisy-chain configuration. The DATA OUT header is used for connection to the DATA IN
header of another PGA4311-EVM when implementing a daisy-chain configuration.
2.4 Analog Input and Output Connectors
The evaluation module includes RCA jacks for connection to waveform generators, signal analyzers,
and commercial audio equipment. The input jacks are labeled AIN1 through AIN4, while the output
jacks are labeled AOUT1 through AOUT4. The analog inputs and outputs are unbalanced
(referenced to ground). The analog input or output swing at these terminals must not exceed 7.5Vp-
p when powered from ±5V analog power supplies.
Table 2. Requirements for Two-Supply Operation.
Supply Recommeded Supply
Designator Supply Voltage Voltage Range
VA+ +5V +4.5V to +5.5V
VA––5V –4.5V to –5.5V
NOTE: Jumpers J1 and J2 need to be installed.