Texas Instruments ADS5413EVM, Руководство пользователя

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1-3 Overview
Table 1−1. Two Pin Jumper List Table
Jumper Function Installed Removed Default
SJP1 Differential amplifier
common-mode voltage
input Applies ADC common mode to
differential amplifier No connection Removed
W4 External REFT feed External Internal Removed
W9 External REFB feed External Internal Removed
Table 1−2. Three Pin Jumper List Table
Jumper Function Location: Pins 1− 2 Location: Pins 2−3 Default
SJP2 Transformer and differential
amplifier common-mode
select External common-mode voltage ADC output common-
mode voltage 2−3
W1 Reference select External reference Internal reference 2−3
W2 DRVDD voltage source +3.3 Vdc Voltage from J13 1−2
W5 Duty cycle select Duty cycle adjust off Duty cycle adjust on 1−2
W7 Power down select Operate mode Power-down mode 1−2
2) Connect supplies to the EVM as follows:
a) 3.3-V core and output driver supply to J6 and return to J5.
3) Switch power supply on.
4) Use a function generator with 50-
Ω
output to input an 65-MHz, 0-V offset,
2-V
p−p
amplitude differential sine-wave signal into J3 and the
complementary signal into J4 to provide a true differential ADC input clock.
The frequency of the clock must be within the specification for the device
speed grade.
5) Use a function generator with 50-
Ω
output to input a 1.65-V offset, 3.3-V
p−p
amplitude square-wave signal into J9 to be used as the buffered output
clock. This signal must be the same frequency and synchronized with the
ADC clock.
6) Use a frequency generator with 50-
Ω
output to input a 17-MHz, 0-V offset,
1-V
p−p
amplitude sine-wave signal into J2. This provides a transformer
coupled differential input signal to the ADC.
7) The digital pattern on the output connector J10 should now represent a
sine wave and can be monitored using a logic analyzer.