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ADC3541 Datasheet(PDF) 19 Page - Texas Instruments

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Part # ADC3541
Description  ADC354x 14-bit, 10-MSPS to 65-MSPS, Low-noise, Ultra-low Power ADC
PDF  68 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADC3541 Datasheet(HTML) 19 Page - Texas Instruments

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7.3 Feature Description
7.3.1 Analog Input
The analog inputs of ADC354x 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 0.95 V 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.
1
AVDD
0.6 pF
GND
GND
2 nH
xINP/
xINM
125
1.4 pF
GND
0.15 pF
GND
0.32 pF
0.6 pF
GND
24
GND
7
0.7 pF
GND
6.4 pF
1.6 pF
GND
5
GND
Sampling Switch
Figure 7-1. Equivalent Input Network
7.3.1.1 Analog Input Bandwidth
Figure 7-2 shows the analog full power input bandwidth of the ADC. The -3 dB bandwidth is approximately TBD
MHz and the useful input bandwidth with good AC performance is approximately 120 MHz.
FPO
Figure 7-2. ADC Analog Input bandwidth (-3 dB)
www.ti.com
ADC3541
SBAS840 – JULY 2020
Copyright © 2020 Texas Instruments Incorporated
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