THS4521-HT_15 Datasheet, PDF (14/27 Pages) Texas Instruments – VERY LOW POWER, NEGATIVE RAIL INPUT,RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER

THS4521-HT
SBOS548D – APRIL 2011 – REVISED MAY 2012
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TYPICAL CHARACTERISTICS: V_S+ – V_S– = 3.3 V (continued)
At V_S+ = +3.3 V, V_S– = 0 V, V_OCM = open, V_OUT = 2 V_PP (differential), R_L = 1 kΩ differential, G = 1 V/V, single-ended input,
differential output, and input and output referenced to midsupply, unless otherwise noted. Graphs are plotted for room
temperature only and are given only for reference.
MAIN AMPLIFIER
DIFFERENTIAL OPEN-LOOP GAIN AND PHASE
120
0
Gain
100
80
-45
60
40
-90
20
Phase
0
OUTPUT BALANCE ERROR
vs FREQUENCY
-20
G = 0 dB
-25
-30
-35
-40
-45
-50
-55
-20
1
-135
10 100 1 k 10 k 100 k 1 M 10 M 100 M
Frequency (Hz)
-60
100 k
1M
10 M
Frequency (Hz)
100 M
Figure 22.
Figure 23.
V_OCM SMALL-SIGNAL FREQUENCY RESPONSE
0
-5
-10
-15
G = 0 dB
V_IN = -20 dBm
-20
100 k
1M
10 M
100 M
1G
Frequency (Hz)
Figure 24.
V_OCM LARGE-SIGNAL PULSE RESPONSE
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
0
V_S+ = 3.3 V
G = 1 V/V
R_F = 1 kW
R_L = 1 kW
100
200
300
400
Time (ns)
Figure 25.
100 k
V_OCM INPUT IMPEDANCE
vs FREQUENCY
10 k
1k
100
100 k
1M
10 M
Frequency (Hz)
Figure 26.
100 M
14
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