SBOU231 October   2020 OPA3S328

 

  1.   Trademarks
  2. 1Overview
    1. 1.1 Related Documentation
    2. 1.2 Electrostatic Discharge Caution
  3. 2EVM Circuit Description
  4. 3Jumper Settings
  5. 4Power-Supply Connections
  6. 5Input and Output Connections
  7. 6Modifications
  8. 7Schematic, PCB Layout, and Bill of Materials
    1. 7.1 Schematic
    2. 7.2 PCB Layout
    3. 7.3 Bill of Materials

5 Input and Output Connections

Input signal connections for the OPA3S328EVM are provided through the use of SMA connectors and jumper headers. The output amplifier connections are provided through SMA connectors and test points. A simplified diagram of the OPA3S328EVM input and output connections is displayed in Figure 2-1 and Figure 2-2.

Table 5-1 summarizes the input and output connectors and corresponding test points for site 1.

Table 5-1 OPA3S328EVM Site 1 Input and Output Connections
Designator Signal Connector Type Description
J4 -INA SMA

Inverting input, amplifier A
J9

D_BIAS

 SMA (not populated) Photodiode bias input, amplifier A
J7

+INA

 SMA Non-inverting input, amplifier A

J8

Output B

 SMA

Output, amplifier B

TP4

 OUTA/B3

Test Point

Output, amplifier A, unswitched

TP3

OUTSA1/B1

 Test point Output, amplifier A, switch A1
TP1

OUTSA2/B2

Test point

 Output, amplifier A, switch A2
TP6 MUXOUT

Test point

 Multiplexer switch B

TP11, TP17

Analog GND

Test point

Analog GND

TP12

DGND Ext

Test point

External digital GND bias
Table 5-2 summarizes the input and output connectors and corresponding test points for site 2.
Table 5-2 OPA3S328EVM Site 2 Input and Output Connections
Designator Signal Connector Type Description
J17 -INA SMA

Inverting input, amplifier A
J19

D_BIAS

 SMA (not populated) Photoiode bias input, amplifier A
J22

+INA

 SMA Non-inverting input, amplifier A

J20

Output A

 SMA

Output, amplifier A

J25

-INB

SMA

 Inverting input, amplifier B

J27

D_BIAS

SMA (not populated)

 Photodiode bias input, amplifier B
J33

+INB

SMA

Non-inverting input, amplifier B

J24

 Output B

SMA

 Output, amplifier B

TP19

 OUTA

Test point

Output, amplifier A

TP16

OUTSA1

 Test Point Output, amplifier A, switch A1
TP13

OUTSA2

Test Point

 Output, Amplifier A, switch A2
TP20

OUTB

Test Point

 Output, amplifier B

TP25

OUTSB1

Test Point

Output, amplifier B, switch B1

TP23

OUTSB2

Test Point

Output, amplifier B, switch B2

TP22

 OUTSB3 Test Point Output, amplifier B, switch B3

TP10, TP18

 Analog GND

Test Point

 Analog GND
TP24 DGND Ext Test point External digital GND bias