THS4521 Datasheet, PDF (14/65 Pages) Texas Instruments – VERY LOW POWER, NEGATIVE RAIL INPUT, RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER

THS4521, THS4522, THS4524
SBOS458H – DECEMBER 2008 – REVISED JUNE 2015
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7.8 Typical Characteristics: V_S+ – V_S– = 3.3 V
At V_S+ = +3.3 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.
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+ ^{= 3.3 V}
-21 ^{RL = 1 kW}
V_O = 100 mV_PP
-24
100 k
1M
10 M
100 M
1G
Frequency (Hz)
Figure 1. Small-Signal Frequency Response
1.5
V_S+ = 3.3 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 3. Large- and Small-Signal Pulse Response
4
2.0
V_OUT Diff
3
Input 1.5
2
1.0
1
0.5
0
0
-1
-0.5
-2 ^{VS+ = 3.3 V}
G = 2 V/V
-3 ^RF ^{= 1 kW}
-4 ^{RL = 200 W}
0 100 200 300 400 500 600
Time (ns)
-1.0
-1.5
-2.0
800 900 1 k
Figure 5. Overdrive Recovery
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+ ^{= 3.3 V}
-21 ^{RL = 1 kW}
-24 ^{VO = 2.0 VPP}
100 k
1M
10 M
100 M
1G
Frequency (Hz)
Figure 2. Large-Signal Frequency Response
600
Rising
500
400
Falling
300
200
100
0
0
V_S+ = 3.3 V
G = 1 V/V
R_F = 1 kW
R_L = 200 W
1
2
3
4
5
Differential V_OUT (V)
Figure 4. Slew Rate vs V_OUT
10
0 ^VS+ ^{= 3.3 V}
-10 ^{G = 1 V/V}
-20 ^RF ^{= 1 kW}
-30 ^VOUT ^{= 5 V}PP
-40
THS4521
-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 6. 10-kHz Output Spectrum On AP Analyzer
14
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