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dc2425af

DEMO MANUAL DC2425A

Quick start proceDure

Demonstration circuit 2425A is easy to set up and evaluate

for performance. Refer to Figure 1 and follow the proce-

dure below.

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Connect the DC2425A to a DC890 USB high speed data

collection board using edge connector P1.

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Connect the DC890 to a host PC with a standard USB

A/B cable.

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Apply a low jitter signal source to J3 to test channel 1.

Note that the DC2425A is capable of accepting a

differential input signal as well as a single-ended signal.

SeetheHardwareSetupsectionforthejumperpositions

that correspond to these configurations.

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As a clock source, apply a low jitter 10dBm sine wave or

square wave to connector J5. See Table 1 for maximum

clock frequencies. Note that J5 has a 50Ω termination

resistor to ground.

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Run the PScope software (Pscope.exe version K73,

or later) supplied with the DC890 or download it from

umentation is available from the Help menu. Updates

can be downloaded from the Tools menu. Check for

updates periodically, as new features may be added.

The PScope software should recognize the DC2425A

and configure itself automatically.

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Click the Collect button (Figure 2) to begin acquiring

data. The Collect button then changes to Pause, which

can be used to stop data acquisition.

assemBly options

Table 1. DC2425A Assembly Options

VERSION

U1 PART NUMBER

MAX CONVERSION RATE

# OF BITS

MAX CLOCK FREQUENCY

DC2425A-A

LTC2311CMSE-16#PBF

5Msps

16

105MHz

DC2425A-B

LTC2310CMSE-16#PBF

2Msps

16

42MHz

DC2425A-C

LTC2311CMSE-14#PBF

5Msps

14

105MHz

DC2425A-D

LTC2310CMSE-14#PBF

2Msps

14

42MHz

DC2425A-E

LTC2311CMSE-12 #PBF

5Msps

12

105MHz

DC2425A-F

LTC2310CMSE-12#PBF

2Msps

12

42MHz

Figure 2. DC2425A PScope Screenshot