THS3201 Datasheet, PDF (17/29 Pages) Texas Instruments – 1.8-GHz, LOW DISTORTION, CURRENT FEEDBACK AMPLIFIER

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POWER SUPPLY
The performance of the THS3201 is dependent upon the
power supply. Slew rate, bandwidth, and distortion are
graphed against the power supply to highlight this
dependence. As the power supply is increased from ±5 V
to ±7.5 V, the slew rate increases, the bandwidth
increases, and the distortion improves.
11000
10000
9000
8000
7000
6000
5000
4000
Rise
VS = ± 7.5 V
RF = 768 Ω
Rise
VS = ± 5 V
RF = 715 Ω
Fall
VS = ± 7.5 V
RF = 768 Ω
3000
2000
1000
0
0
Fall
VS = ± 5 V
RF = 715 Ω
Gain = +2
RL = 100 Ω
1 2 3 4 5 6 7 8 9 10
VO − Output Voltage Step − VPP
Figure 57. Slew Rate vs Output Voltage Step
−45
−50
−55
−60
−65
−70
−75
−80
−85
−90
−95
1
VS = ± 5 V
RF = 715 Ω
VS = ± 7.5 V
RF = 768 Ω
Gain = +2
RL = 100 Ω
VO = 2 VPP
10
100
f − Frequency − MHz
Figure 58. 2nd Harmonic Distortion vs Frequency
THS3201
SLOS416A − JUNE 2003 − REVISED JANUARY 2004
−50
Gain = +2
−55
RL = 100 Ω
−60 ^{VO = 2 VPP}
−65 _{VS = ± 5 V}
−70 ^{RF = 715 Ω}
−75
−80
−85
−90
−95
−100
1
VS = ± 7.5 V
RF = 768 Ω
10
100
f − Frequency − MHz
Figure 59. 3rd Harmonic Distortion vs Frequency
7
VS = ± 7.5 V
6
RF = 768 Ω
5
4
3
VS = ± 5 V
RF = 715 Ω
2
Gain = +2
1 _{RL = 100 Ω}
VO = 2 VPP
0
10
100
1k
10 k
f − Frequency − Hz
Figure 60. Noninverting Small Signal
Frequency Response
17