AD9680 datasheet(33/97 Pages) AD

Part #	AD9680

Description	Dual, 14-Bit, 1.25 GSPS, 1.2 V/2.5 V, Analog-to-Digital Converter

PDF	97 Pages

Scroll/Zoom	100%

Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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33 / 97 page

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Data Sheet

AD9680

Rev. C | Page 33 of 97

EQUIVALENT CIRCUITS

AIN

CONTROL

(SPI)

10pF

VIN+x

VIN–x

AVDD3

VCM

BUFFER

400Ω

AVDD3

1.5pF

3pF

1.5pF

3pF

Figure 104. Analog Inputs

CLK+

CLK–

AVDD1

25Ω

AVDD1

25Ω

20kΩ

VCM = 0.85V

Figure 105. Clock Inputs

SYSREF+

AVDD1_SR

1kΩ

SYSREF–

AVDD1_SR

1kΩ

20kΩ

LEVEL

TRANSLATOR

VCM = 0.85V

Figure 106. SYSREF± Inputs

DRVDD

DRGND

DRVDD

DRGND

OUTPUT

DRIVER

EMPHASIS/SWING

CONTROL (SPI)

DATA+

DATA–

SERDOUTx+

x = 0, 1, 2, 3

SERDOUTx–

x = 0, 1, 2, 3

Figure 107. Digital Outputs

20kΩ

LEVEL

TRANSLATOR

VCM = 0.85V

SYNCINB± PIN

CONTROL (SPI)

SYNCINB+

DVDD

1kΩ

DGND

SYNCINB–

DVDD

1kΩ

DGND

VCM

Figure 108. SYNCINB± Inputs

30kΩ

SPIVDD

ESD

PROTECTED

ESD

PROTECTED

1kΩ

SPIVDD

SCLK

Figure 109. SCLK Input

AD9680 Datasheet(PDF) 33 Page - Analog Devices

AD9680 Datasheet(HTML) 33 Page - Analog Devices

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