ADC3683 datasheet(16/70 Pages) TI1

Part #	ADC3683

Description	ADC3683-SP Space Grade 18-Bit 1 to 65MSPS, Low Noise, Ultra-low Power Dual Channel ADC

PDF	70 Pages

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Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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16 / 70 page

7.3 Feature Description

7.3.1 Analog Input

The analog inputs of ADC3683-SP are intended to be driven differentially. Both AC coupling and DC coupling

of the analog inputs is supported. The analog inputs are designed for an input common mode voltage of 0.95V

which must be provided externally on each input pin. DC-coupled input signals must have a common mode

voltage that meets the device input common mode voltage range.

The equivalent input network diagram is shown in Figure 7-1. All four sampling switches, on-resistance (shown

in red) are in same position (open or closed) simultaneously.

AVDD

0.6 pF

GND

2 nH

xINP/

xINM

125

1.4 pF

GND

0.15 pF

GND

0.32 pF

0.6 pF

GND

0.7 pF

GND

6.4 pF

1.6 pF

GND

Sampling Switch

Figure 7-1. Equivalent input network

ADC3683-SP

SBASAB5 – MARCH 2024

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ADC3683 Datasheet(PDF) 16 Page - Texas Instruments