Power-Down Mode

The DAC power-down/normal operation mode can be

configured with jumper JU1. See Table 3 for jumper

JU1 configuration.

PCB Layout

The MAX5889/MAX5890/MAX5891 EV kits are four-layer

PCBs optimized for high-speed signals. All high-speed

digital signal lines are routed through 100

Ω differential

impedance-matched transmission lines. All analog out-

put traces are routed through 50

Ω impe-dance-

matched transmission lines. The lengths of these 100

Ω

and 50

Ω transmission lines are matched to within 40

mils (1mm) to minimize layout-dependent data skew.

The PCB layout separates the digital, analog, and clock

sections of the circuit for optimum performance.

MAX5889/MAX5890/MAX5891 Evaluation Kits

6

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SHUNT

POSITION

PD PIN

CONNECTION

EV KIT FUNCTION

Installed

Connected to DVDD2

Power-down mode

Not installed

Internally pulled down

Normal operation

Table 3. Power-Down Mode (JU1)