THS1030 Datasheet, PDF (16/22 Pages) Texas Instruments – 2.7 V . 5.5 V, 10-BIT, 30 MSPS CMOS ANALOG-TO-DIGITAL CONVERTER

THS1030
2.7 V – 5.5 V, 10-BIT, 30 MSPS
CMOS ANALOG-TO-DIGITAL CONVERTER
SLAS243A – NOVEMBER 1999 – REVISED JANUARY 2000
PRINCIPLES OF OPERATION
single-ended input (continued)
REFTF
REFBF
AIN
REFTS
THS1030
SHA
A/D
REFBS
MODE
0.1 µF
REFT
0.1 µF
REFB
0.1 µF
0.1 µF
0.1 µF
REFTF
10 µF
REFBF
SW3
Figure 15. Kelvin Connection With External ADC Reference Mode
D Internal ADC Reference Mode With External Input Common Mode: The input common mode is supplied
to pins REFTS and REFBS while connected together. The input signal should be centered around this
common mode with peak-to-peak input equal to the voltage on the V_REF pin. Input can be either dc-coupled
or ac-coupled to the same common mode voltage (see Figure 16) or any other voltage within the input
voltage range.
16
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