THS4521 Datasheet, PDF (17/43 Pages) Texas Instruments – VERY LOW POWER, NEGATIVE RAIL INPUT, RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER

THS4521
THS4522
THS4524
www.ti.com.................................................................................................................................................... SBOS458B – DECEMBER 2008 – REVISED MAY 2009
TYPICAL CHARACTERISTICS: 5 V
At V_S+ = +5 V, V_S– = 0 V, V_OCM = open, V_OUT = 2 V_PP (differential), R_F = 1 kΩ, R_L = 1 kΩ differential, G = 1 V/V, single-ended
input, differential output, and input and output referenced to midsupply, unless otherwise noted.
SMALL-SIGNAL FREQUENCY RESPONSE
6
3
G = 1 V/V
0
-3
G = 2 V/V
-6
G = 5 V/V
-9
-12
G = 10 V/V
-15
-18 ^VS+ ^{= 5.0 V}
-21 ^{RL = 1 kW}
V_O = 100 mV_PP
-24
100 k
1M
10 M
100 M
1G
Frequency (Hz)
Figure 27.
LARGE- AND SMALL-SIGNAL PULSE RESPONSE
1.5
V_S+ = 5 V
G = 1 V/V
1.0 _{RF = 1 kW}
R_L = 200 W
0.5
0
0.5-V Step
-0.5
2-V Step
-1.0
-1.5
0
20
40
60
80
100
Time (ns)
Figure 29.
OVERDRIVE RECOVERY
6
3
V_OUT Diff
Input
4
2
2
1
0
0
-2
V_S+ = 5 V
-4
G = 2 V/V
R_F = 1 kW
-6 ^{RL = 200 W}
0 100 200 300 400 500 600 700 800 900
Time (ns)
Figure 31.
-1
-2
-3
1k
LARGE-SIGNAL FREQUENCY RESPONSE
6
3
G = 1 V/V
0
-3
-6
G = 5 V/V
-9
G = 2 V/V
-12
G = 10 V/V
-15
-18 ^VS+ ^{= 5.0 V}
-21 ^{RL = 1 kW}
-24 ^{VO = 2.0 VPP}
100 k
1M
10 M
100 M
1G
Frequency (Hz)
Figure 28.
800
700
600
500
400
300
200
100
0
0
SLEW RATE vs V_OUT
Falling
Rising
V_S+ = 5 V
G = 1 V/V
R_F = 1 kW
R_L = 200 W
1
2
3
4
5
6
7
Differential V_OUT (V)
Figure 30.
10-kHz OUTPUT SPECTRUM ON
AP ANALYZER AT V_OUT = 8 V_PP
10
0 ^VS+ ^{= 5.0 V}
Generator
-10 ^{G = 1 V/V}
THS4521
-20 ^RF ^{= 1 kW}
-30 V_OUT = 8 V_PP
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
0
5 k 10 k 15 k 20 k 25 k 30 k 35 k
Frequency (Hz)
Figure 32.
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