THS4521 Datasheet, PDF (19/43 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 (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.
SINGLE-ENDED OUTPUT VOLTAGE SWING
vs DIFFERENTIAL LOAD RESISTANCE
5.0
Linear Voltage Range
4.5 V_OCM = 2.5 V
4.0
3.5
3.0
V_OUT max
2.5
2.0
V_OUT min
1.5
1.0
0.5
0
10
100
1k
10 k
Load Resistance (W)
Figure 39.
FREQUENCY RESPONSE vs C_LOAD
R_LOAD = 1 kΩ
5
C_L = 4.7 pF
0
R_O = 150 W
-5
C_L = 1000 pF
R_O = 7.15 W
-10
C_L = 100 pF
-15
R_O = 35.7 W
-20
C_L = 10 pF
R_O = 124 W
-25
100 k
1M
10 M
100 M
1G
Frequency (Hz)
Figure 41.
REJECTION RATIO vs FREQUENCY
110
V_S+ = 5.0 V
G = 1 V/V
100
R_F = 1 kW
90
80
70
60
50
10 k
-PSRR
CMRR
+PSRR
100 k
1M
Frequency (Hz)
Figure 43.
10 M
100 M
MAIN AMPLIFIER DIFFERENTIAL OUTPUT IMPEDANCE
vs FREQUENCY
100
10
1
0.1
0.01
100 k
1k
1M
10 M
Frequency (Hz)
Figure 40.
R_O vs C_LOAD
R_LOAD = 1 kΩ
100 M
100
10
1
10
100
1000
C_LOAD (pF)
Figure 42.
-100
-105
-110
-115
THS4522, THS4524
CROSSTALK (MEASURED DIFFERENTIALLY)
V_S+ = 5 V
G = 1 V/V
R_F = 1 kW
R_L = 1 kW
Active Channel V_OUT = 1 V_RMS
-120
-125
-130
-135
-140
10
100
1k
10 k
100 k
1M
Frequency (Hz)
Figure 44.
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