AD8178 datasheet(19/40 Pages) AD

19 / 40 page

AD8178

Rev. 0 | Page 19 of 40

EQUIVALENT CIRCUITS

1kΩ

(VPOS – VNEG)

1kΩ

OPn, ONn

Figure 8. Enabled Output (see also ESD Protection Map, Figure 19)

0.4pF

3.1kΩ

20kΩ

3.4pF

OPn

VPOS

VNEG

20kΩ

VPOS

VNEG

ONn

Figure 9. Disabled Output (see also ESD Protection Map, Figure 19

)

1.3pF

0.3pF

IPn

INn

10kΩ

2500Ω

5050Ω

Figure 10. Receiver Differential (see also ESD Protection Map, Figure 19)

1.3pF

0.3pF

IPn

INn

10kΩ

2500Ω

Figure 11. Receiver Simplified Equivalent Circuit When Driving Differentially

1.6pF

IPn

INn

2.5kΩ

Figure 12. Receiver Simplified Equivalent Circuit When Driving Single-Ended

0.1pF

VPOS

10kΩ

0.1pF

10kΩ

VNEG

VBLK,

VOCM_CMENCOFF

Figure 13. VBLK and VOCM_CMENCOFF Inputs

(see also ESD Protection Map, Figure 19)

0.3pF

VPOS

3.33kΩ

0.3pF

3.33kΩ

VNEG

VOCM_CMENCON

Figure 14. VOCM_CMENCON Input (see also ESD Protection Map, Figure 19

)

RST

VDD

DGND

1kΩ

25kΩ

Figure 15. RST Input (see also ESD Protection Map, Figure 19)

CLK, SER/PAR, WE,

UPDATE, SERIN

A[2:0], D[4:0],

CMENC

DGND

1kΩ

Figure 16. Logic Input (see also ESD Protection Map, Figure 19)

DGND

1kΩ

25kΩ

Figure 17. CS Input (see also ESD Protection Map, Figure 19)

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