AD9558 datasheet(19/104 Pages) AD

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Data Sheet

AD9558

Rev. A | Page 19 of 104

Pin No.

Mnemonic

Input/

Output

Pin Type

Description

REFA

Differential

input

Reference A Input. This internally biased input is typically ac-coupled and, when

configured as such, can accept any differential signal with single-ended swing up

to 3.3 V. If dc-coupled, input can be LVPECL, LVDS, or single-ended CMOS.

REFA

Differential

input

Complementary Reference A Input. This pin is the complementary input to Pin 43.

45, 46,

51, 52

DVDD3

Power

3.3 V Digital (Reference Input) Power Supply.

REFC

Differential

input

Reference C Input. This internally biased input is typically ac-coupled and, when

configured as such, can accept any differential signal with single-ended swing up

to 3.3 V. If dc-coupled, input can be LVPECL, LVDS, or single-ended CMOS.

REFC

Differential

input

Complementary Reference C Input. This pin is the complementary input to Pin 47.

REFD

Differential

input

Reference D Input. This internally biased input is typically ac-coupled and, when

configured as such, can accept any differential signal with single-ended swing up

to 3.3 V. If dc-coupled, input can be LVPECL, LVDS, or single-ended CMOS.

REFD

Differential

input

Complementary Reference D Input. This pin is the complementary input to Pin 49.

REFB

Differential

input

Reference B Input. This internally biased input is typically ac-coupled and, when

configured as such, can accept any differential signal with single-ended swing up

to 3.3 V. If dc-coupled, input can be LVPECL, LVDS, or single-ended CMOS.

REFB

Differential

input

Complementary Reference B Input. This pin is the complementary input to Pin 53.

57, 58,

59, 60,

61, 62,

M0, M1, M2,

M3, M4, M5,

I/O

3.3 V CMOS

Configurable I/O Pins. These pins are configured under program control. The M7 pin

(Pin 41) is the last pin of this group.

DVDD3

Power

3.3 V Digital Supply.

VSS

Exposed pad

The exposed pad must be connected to ground (VSS).

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