THS4521 Datasheet, PDF (22/65 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
www.ti.com
Typical Characteristics: 5 V (continued)
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.
-100 _{VS+ = 5 V}
4.0
2.5
V_S+ = 5 V
-105 ^{G = 1 V/V}
3.5 G = 1 V/V
R_F = 1 kW
-110 _{RL = 1 kW}
R_F = 1 kW
2.0
3.0 _{RL = 200 W}
-115 ^{Active Channel VOUT = 1 VRMS}
2.5
1.5
-120
2.0
-125
1.5
1.0
-130
-135
-140
10
100
1k
10 k
100 k
1M
Frequency (Hz)
Figure 45. THS4522, THS4524 Crosstalk (Measured
Differentially)
3.5
2.0
3.0
V_S+ = 5 V
G = 1 V/V
1.8
R_F = 1 kW 1.6
2.5
R_L = 200 W _1.4
2.0
1.2
1.0
1.5
0.8
1.0
0.5
0
0
0.6
0.4
V_OUT Diff
PD
0.2
0
20 40 60 80 100 120 140 160 180 200
Time (ns)
Figure 47. Turn-Off Time
120
0
Gain
100
80
-45
60
40
-90
20
Phase
0
1.0
0.5
0
0
0.5
V_OUT Diff
PD
0
20 40 60 80 100 120 140 160 180 200
Time (ns)
Figure 46. Turn-On Time
100
10
Voltage
Noise
Current
1
Noise
0.1
10
100
1k
10 k
100 k
1M
Frequency (Hz)
Figure 48. Input-Referred Voltage and Current Noise
Spectral Density
-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)
Figure 49. Main Amplifier Differential Open-Loop Gain and
Phase
-60
100 k
1M
10 M
100 M
Frequency (Hz)
Figure 50. Output Balance Error vs Frequency
22
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