SBOU231 October 2020 OPA3S328
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.
| 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 |
| 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 |