2

dc2290af

DEMO MANUAL DC2290A

Dc718 Quick start proceDure

Connect the DC2290A to a DC718 USB High Speed Data

Collection Board using edge connector J1. Connect the

DC718 to a host PC with a standard USB A/B cable. Apply

Note that the DC2290A requires a differential input signal

of approximately 8.192V peak-to-peak to reach 0dBFS. If a

differential signal source of this amplitude is not available

use one of the recommended differential amplifier demo

boards available to increase the signal level. For a clock

source, apply a low jitter 10dBm sine wave or square wave

to connector J4. See Table1 for maximum clock frequen-

cies.NotethatJ4hasa50Ωterminationresistortoground.

later) supplied with DC718 or download it from www.

linear.com/software.Completesoftwaredocumentationis

availablefromtheHelpmenu.Updatescanbedownloaded

from the Tools menu. Check for updates periodically as

new features may be added. The PScope software should

recognize the DC2290A and configure itself automatically.

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.

harDware setup

SIGNAL CONNECTIONS

J2: JTAG. Factory use only.

J3: FPGA Program. Factory use only.

J4: CLK IN. This input has a 50Ω termination resistor,

and is intended to be driven by a low jitter, 10dBm sine

or square wave. To achieve full AC performance of this

input is capacitively coupled so that the input clock can

be either 0V to 3.3V or ±1.65V. This eliminates the need

for level shifting. To run at the maximum conversion rate,

apply the frequency specified in Table 1.

JUMPERS

JP1: EEPROM. Factory use only.

JP2: Lanes. Use this jumper to select either single lane or

two lane data output mode from the LTC2387. The default

setting is 1. The 1 setting clocks out all data on pin DA of

the LTC2387. The 2 setting clocks out data alternately on

pins DA and DB of the LTC2387.

JP3: Test Pattern. Use this jumper to deliver a fixed repeat-

ing test pattern from the LTC2387. The default setting is

OFF. The output data will be –97796 if the jumper is in

the ON position in 1 lane mode, and will be –52996 in 2

lane mode.

JP4: ADC ON. Use this jumper to enable or disable the

ADC. The default setting is ON.

Table 1. DC2290A Assembly Options

VERSION

U1 PART NUMBER

MAX CONVERSION RATE

# OF BITS

MAX CLOCK FREQUENCY

DC2290A-A

LTC2387CUH-18#PBF

15Msps

18

15MHz

DC2290A-B

LTC2387CUH-16#PBF

15Msps

16

15MHz

DC2290A-C

LTC2386CUH-18#PBF

10Msps

18

10MHz

DC2290A-D

LTC2386CUH-16#PBF

10Msps

16

10MHz

DC2290A-E

LTC2385CUH-18#PBF

5Msps

18

5MHz

DC2290A-F

LTC2385CUH-16#PBF

5Msps

16

5MHz