ADS9813 datasheet(49/57 Pages) TI1

Part #	ADS9813

Description	ADS9813 18-Bit, 2MSPS, 8-Channel, Simultaneous-Sampling ADC With Integrated Analog Front-End

PDF	57 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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49 / 57 page

8.3 Power Supply Recommendations

The ADS9813 has three separate power supplies: AVDD_5V, VDD_1V8, and IOVDD. There is no requirement

for a specific power-up sequence. The data and configuration digital interfaces are powered by IOVDD. A

common 1.8V supply powers the VDD_1V8 and IOVDD pins. Figure 8-4 illustrates the decoupling capacitor

connections for the respective power supplies. Make sure each power-supply pin has separate decoupling

capacitors.

0.1 F

1 F

Analog supply

(5 V)

AVDD_5V

(pins 15, 56)

0.1 F

1 F

Analog supply

(1.8 V)

VDD_1V8

(pins 47, 48, 49)

0.1 F

1 F

Digital supply

(1.8 V)

VDD_1V8

(pins 21, 22)

0.1 F

1 F

IO supply

(1.2 V to 1.8 V)

IOVDD

(pins 30, 41)

GND

(pins 7, 23, 46,

thermal pad)

IOGND

(29, 42)

Figure 8-4. Power-Supply Decoupling

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ADS9813

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ADS9813 Datasheet(PDF) 49 Page - Texas Instruments

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