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4:1

100

Ω

100

Ω

RLOAD

50

Ω

AGND

IOUT1

IOUT2

Single-Ended Configuration

50

Ω

25

Ω

RLOAD

50

Ω

AGND

IOUT1

IOUT2

DAC5672-EP

SGLS339A – JUNE 2006 – REVISED OCTOBER 2006

APPLICATION INFORMATION (continued)

Figure 24. Driving a Doubly-Terminated 50-

Ω Cable Using a 4:1 Impedance Ratio Transformer

Figure 25 shows the single-ended output configuration, where the output current IOUT1 flows into an equivalent

load resistance of 25

Ω. Node I

OUT2 must be connected to AGND or terminated with a resistor of 25 Ω to AGND.

The nominal resistor load of 25

Ω gives a differential output swing of 1 V

PP when applying a 20-mA full-scale

output current.

Figure 25. Driving a Doubly-Terminated 50-

Ω Cable Using a Single-Ended Output

20

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