THS4521-HT_15 Datasheet, PDF (12/27 Pages) Texas Instruments – VERY LOW POWER, NEGATIVE RAIL INPUT,RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER

THS4521-HT
SBOS548D – APRIL 2011 – REVISED MAY 2012
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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. Graphs are plotted for room
temperature only and are given only for reference.
HARMONIC DISTORTION
vs V_OCM AT 1 MHZ
-30
V_S+ = 3.3 V
-40 ^{G = 1 V/V}
R_F = 1 kW
-50 ^RL ^{= 1 kW}
f = 1 MHz
-60 ^VOUT ^{= 2.0 V}PP
-70
Second
-80
Harmonic
-90
-100
0
Third
Harmonic
0.5
1.0
1.5
2.0
2.5
3.0
V_OCM (V)
Figure 12.
TWO-TONE INTERMODULATION DISTORTION
vs FREQUENCY
-10
V_S+ = 3.3 V
-20 _{G = 1 V/V}
-30 ^RF ^{= 1 kW}
-40 ^{RL = 1 kW}
-50
V_OUT = 2.0 V_PP
envelope
-60
Second
Intermodulation
-70
Third
-80
Intermodulation
-90
-100
-110
1
10
100
Frequency (MHz)
Figure 13.
SINGLE-ENDED OUTPUT VOLTAGE SWING
vs LOAD RESISTANCE
3.5 _{Linear Voltage Range}
3.0 ^{VOCM = 1.65 V}
2.5
2.0
V_OUT max
1.5
V_OUT min
1.0
0.5
0
10
100
1k
10 k
Load Resistance (W)
Figure 14.
MAIN AMPLIFIER DIFFERENTIAL OUTPUT IMPEDANCE
vs FREQUENCY
100
10
1
0.1
0.01
100 k
1M
10 M
Frequency (Hz)
Figure 15.
100 M
12
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