THS4521-HT_15 Datasheet, PDF (13/27 Pages) Texas Instruments – VERY LOW POWER, NEGATIVE RAIL INPUT,RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER

THS4521-HT
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SBOS548D – APRIL 2011 – REVISED MAY 2012
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. Graphs are plotted for room
temperature only and are given only for reference.
FREQUENCY RESPONSE vs C_LOAD
R_LOAD = 1 kΩ
5
1k
C_L = 4.7 pF
0
R_O = 150 W
R_O vs C_LOAD
R_LOAD = 1 kΩ
-5
C_L = 1000 pF
R_O = 7.15 W
100
-10
C_L = 100 pF
R_O = 35.7 W
-15
10
-20
C_L = 10 pF
R_O = 124 W
-25
1
100 k
1M
10 M
100 M
1G
10
Frequency (Hz)
Figure 16.
100
C_LOAD (pF)
Figure 17.
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 18.
CMRR
+PSRR
10 M
100 M
TURN-ON TIME
4.0
2.5
V_S+ = 3.3 V
3.5 G = 1 V/V
R_F = 1 kW
2.0
3.0 _{RL = 200 W}
2.5
1.5
2.0
1.5
1.0
1.0
V_OUT Diff
PD
0.5
0.5
0
0
0 20 40 60 80 100 120 140 160 180 200
Time (ns)
Figure 19.
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
TURN-OFF TIME
2.0
V_S+ = 3.3 V
G = 1 V/V
1.8
R_F = 1 kW 1.6
R_L = 200 W _1.4
1.2
1.0
0.8
0.6
V_OUT Diff
0.4
PD
0.2
0
20 40 60 80 100 120 140 160 180 200
Time (ns)
Figure 20.
INPUT-REFERRED VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY
100
10
Voltage
Noise
Current
1
Noise
0
10
100
1k
10 k
100 k
1M
Frequency (Hz)
Figure 21.
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