DAC5652-EP Datasheet, PDF (20/27 Pages) Texas Instruments – DUAL 10-BIT 200-MSPS DIGITAL-TO-ANALOG CONVERTER

DAC5652-EP
SGLS341B – JUNE 2006 – REVISED OCTOBER 2006
APPLICATION INFORMATION (continued)
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I_OUT1
I_OUT2
100 Ω
4:1
AGND
100 Ω
R_LOAD
50 Ω
Figure 20. Driving a Doubly-Terminated 50-Ω Cable Using a 4:1 Impedance Ratio Transformer
Single-Ended Configuration
Figure 21 shows the single-ended output configuration, where the output current I_OUT1 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.
I_OUT1
I_OUT2
R_LOAD
50 Ω
50 Ω
25 Ω
AGND
Figure 21. Driving a Doubly-Terminated 50-Ω Cable Using a Single-Ended Output
20
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