THS4500 Datasheet, PDF (17/37 Pages) Texas Instruments – WIDEBAND, LOW DISTORTION FULLY DIFFERENTIAL AMPLIFIERS

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THS4500
THS4501
SLOS350D − APRIL 2002 − REVISED JANUARY 2004
TYPICAL CHARACTERISTICS (5 V Graphs)
HARMONIC DISTORTION
vs
OUTPUT VOLTAGE SWING
0
Single-Ended Input to
−10 _{Differential Output}
−20 ^{Gain = 2}
RL = 800 Ω
−30 Rf = 1 kΩ
f = 30 MHz
−40 _{VS = 5 V}
−50
HD2
−60
HD3
−70
−80
−90
−100
0 0.5
1
1.5 2
2.5 3
VO − Output Voltage Swing − V
Figure 69
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
0
HARMONIC DISTORTION
vs
LOAD RESISTANCE
Differentia Input to
Differential Output
Gain = 1
VO = 2 VPP
Rf = 392 Ω
f= 30 MHz
VS = 5 V
HD2
HD3
400
800
1200
RL − Load Resistance − Ω
Figure 72
1600
HARMONIC DISTORTION
vs
OUTPUT VOLTAGE SWING
0
Differentia Input to
−10 _{Differential Output}
−20 ^{Gain = 2}
RL = 800 Ω
−30 Rf = 1 kΩ
−40 ^{f= 30 MHz}
VS = 5 V
−50
HD2
−60
HD3
−70
−80
−90
−100
0 0.5
1
1.5 2
2.5 3
VO − Output Voltage Swing − V
Figure 70
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
0
HARMONIC DISTORTION
vs
LOAD RESISTANCE
Single-Ended Input to
Differential Output
Gain = 1
VO = 2 VPP
Rf = 392 Ω
f= 30 MHz
VS = 5 V
HD2
HD3
400
800
1200
RL − Load Resistance − Ω
1600
Figure 71
THIRD-ORDER INTERMODULATION
DISTORTION
vs
FREQUENCY
−50
Single-Ended Input to
Differential Output
−60 ^{Gain = 1}
VO = 2 VPP
Rf = 392 Ω
−70 ^{RL = 800 Ω}
VS = 5 V
−80
THIRD-ORDER OUTPUT INTERCEPT
POINT
vs
FREQUENCY
55
Gain = 1
VO = 2 VPP
50
Rf = 392 Ω
RL = 800 Ω
VS = 5 V
45
40
−90
−100
10
f − Frequency − MHz
Figure 73
35
30
100
0 20 40 60 80 100 120
f − Frequency − MHz
Figure 74
SLEW RATE
vs
DIFFERENTIAL OUTPUT VOLTAGE STEP
1400
Gain = 1
1200
1000
RL = 800 Ω
Rf = 392 Ω
VS = 5 V
800
600
400
200
0
0 0.5 1 1.5 2 2.5 3
VO − Differential Output Voltage Step − V
Figure 75
LARGE-SIGNAL TRANSIENT RESPONSE
2
1.5
1
0.5
0
−0.5
−1
Gain = 1
RL = 800 Ω
Rf = 392 Ω
tr/tf = 300 ps
VS = 5 V
−1.5
−2
−100 0
100 200 300 400 500
t − Time − ns
Figure 76
SMALL-SIGNAL TRANSIENT RESPONSE
0.4
0.3
0.2
Gain = 1
0.1
RL = 800 Ω
Rf = 392 Ω
0
tr/tf = 300 ps
−0.1
VS = 5 V
−0.2
−0.3
−0.4
−100 0
100 200 300 400 500
t − Time − ns
Figure 77
17