Difference between revisions of "Differential Probe Assembly Sheet"

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== Parts List ==
 
== Parts List ==
  
# The LTC6268S6 op amps come in various speed grades/costs. Package is SOT-23-6 Thin.
+
1) The LTC6268S6 op amps come in various speed grades/costs. Package is SOT-23-6 Thin.
 
** [https://www.mouser.com/ProductDetail/Analog-Devices/LTC6268IS6-10TRMPBF?qs=oahfZPh6IAK%2Fgwt4Y8oAdg%3D%3D LTC6268IS6-10] part has 4 GHz Gain Bandwidth Product (Mouser $8.40 qty 1 - May 2021)
 
** [https://www.mouser.com/ProductDetail/Analog-Devices/LTC6268IS6-10TRMPBF?qs=oahfZPh6IAK%2Fgwt4Y8oAdg%3D%3D LTC6268IS6-10] part has 4 GHz Gain Bandwidth Product (Mouser $8.40 qty 1 - May 2021)
 
** [https://www.mouser.com/ProductDetail/Analog-Devices/LTC6268IS6TRMPBF?qs=hVkxg5c3xu%252BqAy0hl7mh3Q%3D%3D LTC6268IS6#TRMPBF] part has 500 MHz Gain Bandwidth Product (Mouser $8.35 qty 1 - May 2021)
 
** [https://www.mouser.com/ProductDetail/Analog-Devices/LTC6268IS6TRMPBF?qs=hVkxg5c3xu%252BqAy0hl7mh3Q%3D%3D LTC6268IS6#TRMPBF] part has 500 MHz Gain Bandwidth Product (Mouser $8.35 qty 1 - May 2021)
 
** [https://www.mouser.com/ProductDetail/Analog-Devices/LTC6268HS6TRMPBF?qs=hVkxg5c3xu91%252BPaamVzhRQ%3D%3D TC6268HS6#TRMPBF] part has 500 MHz Gain Bandwidth Product (Mouser $9.48 qty 1 - May 2021)
 
** [https://www.mouser.com/ProductDetail/Analog-Devices/LTC6268HS6TRMPBF?qs=hVkxg5c3xu91%252BPaamVzhRQ%3D%3D 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
 
** Second stage has 10 gain so expect card to have 1/10 the op amp bandwidth
# R1, R2 are input scale resistors
+
2) R1, R2 are input scale resistors
  
 
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{| class="wikitable"

Revision as of 13:00, 8 May 2021

DiffProbe-BothSides-X2bw.png

  • Reference designator near pin 1 in ICs

Parts List

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

Qty Value RefDes Qty Value RefDes
1 LT1761 U3 3 10K, 1% (0805) R4,R7,R8
2 LTC6268S6
Digikey
Mouser
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) 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