THS4505 Datasheet, PDF (10/45 Pages) Texas Instruments – WIDEBAND, LOW-DISTORTION, FULLY DIFFERENTIAL AMPLIFIERS

THS4504
THS4505
SLOS363D – AUGUST 2002 – REVISED MAY 2008 ......................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS: ±5 V
SMALL-SIGNAL UNITY-GAIN
FREQUENCY
1
0.5
0
−0.5
−1
−1.5
−2
−2.5
−3
−3.5
−4
Gain = 1
R_L = 800 Ω
R_f = 499 Ω
P_IN = −20 dBm
V_S = ±5 V
0.1
1
10
100
f − Frequency − MHz
1000
Figure 1.
LARGE-SIGNAL FREQUENCY
RESPONSE
25
Gain = 10, R_f = 1.8 kΩ
20
R_L = 800 Ω
V_O = 2 V_PP
V_S = ±5 V
15 ^{Gain = 5, Rf = 1.8 kΩ}
10
Gain = 2, R_f = 1.8 kΩ
5
Gain = 1, R_f = 499 Ω
0
−5
0.1
1
10
100
f − Frequency − MHz
Figure 4.
1000
HARMONIC DISTORTION
vs
OUTPUT VOLTAGE SWING
0
−10
Single Input to
Differential Output
−20 Gain = 1
−30
R_L = 800 Ω
R_f = 499 Ω
−40 f= 30 MHz
−50 ^{VS = ±5 V}
−60
−70
HD2
−80
−90
HD3
−100
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
V_O − Output Voltage Swing − V
Figure 7.
SMALL-SIGNAL FREQUENCY
RESPONSE
22
Gain = 10
20
18
16
Gain = 5
14
12
10
8 _{Gain = 2}
6
4 ^RL ^{= 800 Ω}
2
R_f =499 Ω
P_IN = −20 dBm
0 _{VS = ±5 V}
−2
0.1
1
10
100
1000
f − Frequency − MHz
Figure 2.
HARMONIC DISTORTION
vs
FREQUENCY
0
−10 ^{Single-Ended Input to}
Differential Output
−20 Gain = 1
−30
R_L = 800 Ω
R_f = 499 Ω
−40 VO = 2 VPP
−50 ^{VS = ±5 V}
−60
−70
HD2
−80
−90
−100
0.1
HD3
1
10
100
f − Frequency − MHz
Figure 5.
HARMONIC DISTORTION
vs
LOAD RESISTANCE
0
Single-Ended Input to
−10
Differential Output
Gain = 1
−20
V_O = 2 V_PP
−30
R_f = 499 Ω
−40
V_S = ±5 V
−50
HD3, 30 MHz
HD2, 30 MHz
−60
−70
HD2, 8 MHz
−80
−90
HD3, 8 MHz
−100
0
400
800
1200
R_L − Load Resistance − Ω
Figure 8.
1600
0.1-dB GAIN FLATNESS
FREQUENCY RESPONSE
0.05
0
R_f = 499 Ω
−0.05
−0.1
−0.15
−0.2
−0.25
Gain = 1
R_L = 800 Ω
P_IN = −20 dBm
V_S = ±5 V
−0.3
1
10
100
f − Frequency − MHz
Figure 3.
1000
HARMONIC DISTORTION
vs
OUTPUT VOLTAGE SWING
0
−10
Single-Ended Input to
Differential Output
−20 Gain = 1
−30
R_L = 800 Ω
R_f = 499 Ω
−40 f= 8 MHz
−50 ^{VS = ±5 V}
−60
−70
HD2
−80
−90
HD3
−100
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
V_O − Output Voltage Swing − V
Figure 6.
THIRD-ORDER INTERMODULATION
DISTORTION
vs
FREQUENCY
−30
Single-Ended Input to
Differential Output
−40
Gain = 1
−50 ^{RL = 800 Ω}
R_f = 499 Ω
−60 ^{VS = ±5 V}
V_O = 2 V_PP
−70
−80
−90
−100
10
V_O = 1 V_PP
200 kHz Tone Spacing
100
f − Frequency − MHz
Figure 9.
10
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