AD6676EBZ datasheet(21/90 Pages) AD

21 / 90 page

Data Sheet

AD6676

Rev. D | Page 21 of 90

EQUIVALENT CIRCUITS

CSB, SCLK

OR SDI

1kΩ

VDDIO

Figure 58. Equivalent CSB or SCLK Input Circuit

VIN+

VIN–

RIN = 60Ω

VCM = 1.0V

Figure 59. Equivalent Analog Input

–

CLK+

CLK–

TO CLK SYN

TO BAND-PASS

Σ-∆ ADC

50Ω

VDD1

Figure 60. Equivalent Clock Input Circuit

SYSREF+

VDDHSI

1kΩ

SYSREF–

VDDHSI

1kΩ

10kΩ

LEVEL

TRANSLATOR VCM = 0.55V

Figure 61. Equivalent SYSREF± Input

1kΩ

VDDIO

SDIO

AGCx

I/O

ESD

PROTECTED

ESD

PROTECTED

Figure 62. Equivalent SDIO or AGCx Input/Output Circuit

RESETB

1kΩ

VDDIO

25kΩ

Figure 63. Equivalent RESETB Input Circuit

20kΩ

LEVEL

TRANSLATOR VCM = 0.85V

SYNCINB± PIN

CONTROL (SPI)

SYNCINB+

VDDIO

1kΩ

DGND

SYNCINB–

VDDIO

1kΩ

DGND

VCM

Figure 64. Equivalent SYNCINB± Input

SERDOUTx+

SERDOUTx–

DATA+

DATA–

x = 0, 1

VDDHSI

OUTPUT

DRIVER

EMPHASIS/SWING

CONTROL (SPI)

Figure 65. Digital CML Output Circuit

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