ADS5400IPZP datasheet(39/50 Pages) TI

номер детали	ADS5400IPZP

подробное описание детали	12-Bit, 1-GSPS Analog-to-Digital Converter

PDF	50 Pages

Scroll/Zoom	100%

производитель	TI [Texas Instruments]

домашняя страница	http://www.ti.com

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39 / 50 page

Frequency − MHz

100

G022

0.01

0.1

100

DVDD3

AVDD3

AVDD5

ADS5400

www.ti.com

SLAS611B – OCT 2009 – REVISED MARCH 2010

Power Supplies

The ADS5400 uses three power supplies. For the analog portion of the design, a 5-V and 3.3-V supply (AVDD5

and AVDD3) are used, while the digital portion uses a 3.3-V supply (DVDD3). The use of low-noise power

supplies with adequate decoupling is recommended. Linear supplies are preferred to switched supplies; switched

supplies generate more noise components that can be coupled to the ADS5400. The PSRR value and the plot

shown in Figure 38 were obtained without bulk supply decoupling capacitors. When bulk (0.1 mF) decoupling

capacitors are used, the board-level PSRR is much higher than the stated value for the ADC. The power

consumption of the ADS5400 does not change substantially over clock rate or input frequency as a result of the

architecture and process.

Figure 38. PSRR versus Supply Injected Frequency

Product Folder Link(s): ADS5400

ADS5400IPZP датащи(PDF) 39 Page - Texas Instruments