EVM Default Configuration
1.4 EVM Default Configuration
As delivered, the EVM has a fully functional example circuit, just add power supplies, a signal source, and monitoring instrument. See Figure 1−1 for the default schematic diagram. The user can change the gain by changing the ratios of the feedback and gain resistors (see the device data sheet for recommended resistor values). Chapter 5 has a complete EVM schematic diagram showing all component locations.
The default configuration assumes a
Some components such as C8, C9, C11, C12, TP1, TP2, R10, T1, and J4 are omitted on the application schematics of Chapter 3 for clarity.
Figure 1−1. Schematic of the Populated Circuit on the EVM (Default Configuration)
J1
Vin−
J6
Vin+
TP1
Vocm
C13
1 µF
C1 0 R2
374Ω
R1
56.2Ω
C2 0 R3
402Ω
R17
0
|
| TP2 |
|
| PD− |
| R4 |
|
| 392Ω |
|
| +VS |
|
| 3 | R6 0 |
| U1 |
|
1 | − | 4 |
2 | Vocm |
|
8 | + | 5 |
|
| R7 0 |
| THS4503 |
|
| 6 |
|
| −VS |
|
| R5 |
|
| 392Ω |
|
TP3 TP4 TP5
J7
GND
|
|
| J2 | |
|
|
| Vout+ | |
R8 |
| T1 |
| |
4 | 3 | J4 | ||
| ||||
340Ω |
|
| Vout | |
R10 | 5 |
|
| |
280Ω |
|
| ||
R9 | 6 | 1 |
| |
|
| |||
340Ω | ADP4−1WT |
| ||
|
| |||
J3
Vout−
J8
+VS
|
|
| +VS | J5 |
|
|
| −VS |
+ C8 |
|
| −VS |
|
|
| ||
| C9 |
| C11 | C12 | ||||
|
|
| ||||||
6.8 | µF | 0.1 | µF |
| + 6.8 | µF | 0.1 | µF |
Introduction and Description |
