THS3215 Datasheet, PDF (61/71 Pages) Texas Instruments – THS3215 650-MHz, Differential to Single-Ended DAC Output Amplifier

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THS3215
SBOS780A – MARCH 2016 – REVISED APRIL 2016
11 Power Supply Recommendations
The THS3215 typically operates on balanced, split supplies. The specifications and characterization plots use ±6
V in most cases. The full operating range for the THS3215 spans ±4 V to ±7.9 V. The input and output stages
have separate supply pins that are isolated internally.
The recommended external supply configuration brings ±V_CC into the output stage first, then back to the input
stage connections through a π-filter comprised of ferrite beads and added decoupling capacitors at +VCC2 (pin
16) and –VCC2 (pin 5). Figure 106 shows an example decoupling configuration. This same circuit configuration
was used to characterize the D2S + OPS performance in Figure 1 to Figure 12.
Ferrite Bead
4H
Ferrite Bead
4H
6V
10 nF
220 nF
10 nF
220 nF
2.2 …F
49.9
Differential
V_IN
49.9
16
15
1
50 k
2 x1
50 k
x1
50
+
250
500
3 x1
14
100
4
13
18.5 k
162
12
249
11
AV = 5 V/V
49.9
To
50-Ÿ /RDG
10
18.5 k
9
5
6
7
8
200
Ferrite Bead
4H
10 nF
220 nF
Ferrite Bead
4H
-6 V
10 nF
220 nF
2.2 …F
Figure 106. Recommended Power-Supply Configuration
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