Differential Probe Assembly Sheet
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- Reference designator near pin 1 in ICs
Parts List
| Qty | Value | RefDes | Qty | Value | RefDes | |
|---|---|---|---|---|---|---|
| 1 | LT1761 | U3 | 3 | 10K, 1% (0805) | R4,R7,R8 | |
| 2 | LTC6268S6
Digikey Mouser Note 1 |
U1,U2 | 1 | 191K, 1% (0805) | R9 | |
| 4 | 10nF (0805) | C3-C5,C9 | 1 | 4.99K, 1% (0805) | R6 | |
| 1 | 10uF (1206) | C8 | 1 | 48.7, 1% (0805) | R12 | |
| 2 | 1uF (0805) | C6,C7 | 2 | 49.9K, 1% (0805)
Note 2 |
R1,R2 | |
| 2 | 2.2nF/1kV (1206) | C1,C2 | 1 | LED (3mm) | D1 | |
| 1 | 499, 1% (0805) | R10 | 1 | BNC | J2 | |
| 1 | 54.9, 1% (0805) | R11 | 2 | CONN, 1X2 | J1,J3 | |
| 2 | 549, 1% (0805) | R3,R5 | 1 | SPST (0.1" pitch) | SW1 | |
| 1 | 75, 1% (0805) | R13 |
Notes
1) The LTC6268S6 op amps come in various speed grades/costs. Package is SOT-23-6 Thin.
- LTC6268IS6-10 part has 4 GHz Gain Bandwidth Product (Mouser $8.40 qty 1 - May 2021)
- LTC6268IS6#TRMPBF part has 500 MHz Gain Bandwidth Product (Mouser $8.35 qty 1 - May 2021)
- TC6268HS6#TRMPBF part has 500 MHz Gain Bandwidth Product (Mouser $9.48 qty 1 - May 2021)
- Second stage has 10 gain so expect card to have 1/10 the op amp bandwidth
2) R1, R2 are input scale resistors
