THS4521_10 Datasheet, PDF (14/48 Pages) Texas Instruments – VERY LOW POWER, NEGATIVE RAIL INPUT, RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER

THS4521
THS4522
THS4524
SBOS458D – DECEMBER 2008 – REVISED AUGUST 2010
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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.
SINGLE-ENDED OUTPUT VOLTAGE SWING
vs LOAD RESISTANCE
MAIN AMPLIFIER DIFFERENTIAL OUTPUT IMPEDANCE
vs FREQUENCY
3.5 _{Linear Voltage Range}
100
3.0 ^{VOCM = 1.65 V}
10
2.5
2.0
V_OUT max
1
1.5
V_OUT min
1.0
0.1
0.5
0
10
100
1k
Load Resistance (W)
0.01
10 k
100 k
1M
10 M
100 M
Frequency (Hz)
Figure 13.
Figure 14.
5
0
-5
-10
-15
-20
-25
100 k
FREQUENCY RESPONSE vs C_LOAD
R_LOAD = 1 kΩ
C_L = 1000 pF
R_O = 7.15 W
C_L = 100 pF
R_O = 35.7 W
C_L = 4.7 pF
R_O = 150 W
C_L = 10 pF
R_O = 124 W
1M
10 M
100 M
1G
Frequency (Hz)
Figure 15.
1k
100
10
1
10
R_O vs C_LOAD
R_LOAD = 1 kΩ
100
C_LOAD (pF)
Figure 16.
1000
REJECTION RATIO vs FREQUENCY
110
100
90
80
70
60 ^{VS+ = 3.3 V}
G = 1 V/V
R_F = 1 kW
50
10 k
100 k
-PSRR
1M
Frequency (Hz)
Figure 17.
CMRR
+PSRR
10 M
100 M
THS4522, THS4524
CROSSTALK (MEASURED DIFFERENTIALLY)
-100
-105
-110
-115
V_S+ = 3.3 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 18.
14
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