THS4121 Datasheet, PDF (5/31 Pages) National Semiconductor (TI) – HIGH-SPEED FULLY DIFFERENTIAL I/O AMPLIFIERS

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THS4120
THS4121
SLOS319D – FEBRUARY 2001 – REVISED OCTOBER 2004
TYPICAL CHARACTERISTICS (continued)
z_o
Single-ended (V_OCM) input impedance
vs Frequency
FIGURE
17
SMALL-SIGNAL FREQUENCY RESPONSE
2
R_f = 390 Ω
1
R_f = 270 Ω
0
R_f = 200 Ω
R_f = 150 Ω
−1
SLEW RATE
1.5
Falling Edge
1
0.5
V_DD = 3.3 V,
V_O = 2 V_PP,
T_A= 25°C
G=1
0
R_L = 800 Ω
−2
−0.5
−3 G = 1
V_I = 22.5 mV_RMS
V_DD = 3.3 V
−4
100 k
1M
10 M
100 M
1G
f − Frequency − Hz
Figure 1.
TOTAL HARMONIC DISTORTION
vs
FREQUENCY
−20
V_DD = 3.3 V,
V_O = 4 V_PP
−30
R_f = 200 Ω,
R_L = 800 Ω
G=1
−40
Single−Ended Input /
−50
Differential Output
−1
Rising Edge
−1.5
0
20
40
60
80
t − Time − ns
Figure 2.
TOTAL HARMONIC DISTORTION
vs
OUTPUT VOLTAGE
−50
V_DD = 3.3 V,
f = 1 MHz
R_f = 200 Ω,
R_L = 800 Ω
−60
Single Input /
Differential Output
Differential Input /
Differential Output
−70
−60
−70
−80
100 k
Differential Input/
Differential Output
1M
f − Frequency − Hz
Figure 3.
10 M
−80
−90
0
1
2
3
4
5
V_O − Output Voltage − V
Figure 4.
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