THS4120 Datasheet, PDF (7/23 Pages) Texas Instruments – HIGH-SPEED FULLY DIFFERENTIAL I/O AMPLIFIERS

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THS4121
HARMONIC DISTORTION
vs
FREQUENCY
−20
V_DD = 3.3 V,
−30
V_O = 4 V_PP,
R_L = 800 Ω,
R_f = 200 Ω,
−40 ^{G = 1}
2nd_HD
−50
3rd_HD
−60
−70
−80
−90
−100
100 k
5th_HD
4th_HD
Single Input / Differential Output
1M
f − Frequency − Hz
10 M
Figure 7.
THS4121
HARMONIC DISTORTION
vs
OUTPUT VOLTAGE
−60 _{VDD = 3.3 V,}
f = 1 MHz,
−70
R_L = 800 Ω,
R_f = 200 Ω,
G=1
2nd_HD
−80
3rd_HD
−90
−100
4th_HD
5th_HD
−110
Single Input / Differential Output
−120
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
V_O − Output Voltage − V
Figure 9.
THS4120
THS4121
SLOS319D – FEBRUARY 2001 – REVISED OCTOBER 2004
THS4121
HARMONIC DISTORTION
vs
OUTPUT VOLTAGE
−60
V_DD = 3.3 V,
f = 1 MHz,
−70 ^{RL = 800 Ω,}
R_f = 200 Ω,
G=1
2nd_HD
−80
3rd_HD
−90
−100
−110
−120
0
0.5 1
1.5 2
Differential Input /
Differential Output
2.5 3 3.5 4 4.5 5
V_O − Output Voltage − V
Figure 8.
THIRD INTERMODULALTION DISTORTION
vs
OUTPUT VOLTAGE
−10
V_DD = 3.3 V,
f = 1 MHz
−20 _{Rf = 270 Ω,}
R_L = 800 Ω
−30
−40
f = 10 MHz
−50
−60
−70
f = 5 MHz
−80
−90−25 _{−20 −15 −10 −5}
0
5
10
V_O − Output Voltage − V
Figure 10.
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