AD9548 datasheet(80/111 Pages) AD

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AD9548

Data Sheet

Address

Bits

Bit Name

Description

0x0407

[7:6]

Unused

[5]

OUT3 CMOS phase

invert

When the output mode is CMOS, the bit inverts the relative phase between the two CMOS output

pins. Otherwise, this bit is nonfunctional.

0 (default) = not inverted.

1 = inverted.

[4]

OUT3 polarity

invert

Invert the polarity of OUT3.

0 (default) = not inverted.

1 = inverted.

[3]

OUT3 drive

strength

OUT3 output drive capability control.

0 (default) = CMOS: low drive strength; LVDS: 3.5 mA nominal.

1 = CMOS: normal drive strength; LVDS: 7 mA nominal.

[2:0]

OUT3 mode

OUT3 operating mode select.

000 = CMOS (both pins).

001 = CMOS (positive pin), tristate (negative pin).

010 = tristate (positive pin), CMOS (negative pin).

011 (default) = tristate (both pins).

100 = LVDS.

101 = LVPECL.

110 = reserved.

111 = reserved.

Table 71. Q0 Divider1

Address

Bits

Bit Name

Description

0x0408

[7:0]

Q0 divider, Bits[7:0]

0x0409

[7:0]

Q0 divider, Bits[15:8]

0x040A

[7:0]

Q0 divider, Bits[23:16]

0x040B

[7:6]

Unused

[5:0]

Q0 divider, Bits[29:24]

The default value is 0 (or divide by 1).

Table 72. Q1 Divider1

Address

Bits

Bit Name

Description

0x040C

[7:0]

Q1 divider, Bits[7:0]

0x040D

[7:0]

Q1 divider, Bits[15:8]

0x040E

[7:0]

Q1 divider, Bits[23:16]

0x040F

[7:6]

Unused

[5:0]

Q1 divider, Bits[29:24]

The default value is 0 (or divide by 1).

Table 73. Q2 Divider1

Address

Bits

Bit Name

Description

0x0410

[7:0]

Q2 divider, Bits[7:0]

0x0411

[7:0]

Q2 divider, Bits[15:8]

0x0412

[7:0]

Q2 divider, Bits[23:16]

0x0413

[7:6]

Unused

[5:0]

Q2 divider, Bits[29:24]

The default value is 0 (or divide by 1).

Rev. G | Page 80 of 111

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