AD9516-2SLASHPCBZ datasheet(72/84 Pages) AD

72 / 84 page

AD9516-2

Rev. 0 | Page 72 of 84

Reg.

Addr

(Hex) Bit(s) Name

Description

<1:0> OUT4

LVPECL power-down modes.

Power-Down <1> <0>

Mode

Output

Normal operation.

Partial power-down, reference on; use only if there are no external load resistors.

Off

Partial power-down, reference on, safe LVPECL power-down.

Off

Total power-down, reference off; use only if there are no external load resistors.

Off

<4>

OUT5 Invert

Sets the output polarity.

<4> = 0; noninverting.

<4> = 1; inverting.

<3:2> OUT5 LVPECL Sets the LVPECL output differential voltage (VOD).

Differential

<3> <2> VOD (mV)

Voltage

400

600

780

960

<1:0> OUT5

LVPECL power-down modes.

Power-Down <1>

<0>

Mode

Output

Normal operation.

Partial power-down, reference on; use only if there are no external load resistors.

Off

Partial power-down, reference on, safe LVPECL power-down.

Off

Total power-down, reference off; use only if there are no external load resistors.

Off

Table 56. LVDS/CMOS Outputs

Reg.

Addr

(Hex) Bit(s) Name

Description

140

<7:5> OUT6 Output Polarity

In CMOS mode, <7:5> select the output polarity of each CMOS output.

In LVDS mode, only <5> determines LVDS polarity.

<7> <6>

<5> OUT6A (CMOS)

OUT6B (CMOS)

OUT6 (LVDS)

Noninverting

Inverting

Noninverting

Inverting

Noninverting

Inverting

Noninverting

Inverting

Noninverting

Inverting

Noninverting

Inverting

Noninverting

Inverting

140

<4>

OUT6 CMOS B

In CMOS mode, turn on/off the CMOS B output. There is no effect in LVDS mode.

<4> = 0; turn off the CMOS B output.

<4> = 1; turn on the CMOS B output.

140

<3>

OUT6 Select LVDS/CMOS

Select LVDS or CMOS logic levels.

<3> = 0; LVDS.

<3> = 1; CMOS.

140

<2:1> OUT6 LVDS Output Current

Set output current level in LVDS mode. This has no effect in CMOS mode.

<2>

<1> Current (mA)

Recommended Termination (Ω)

1.75

100

3.5

100

5.25

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