THS4531A Datasheet, PDF (13/51 Pages) Texas Instruments – Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier

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THS4531A
SLOS823A – DECEMBER 2012 – REVISED JANUARY 2013
TYPICAL CHARACTERISTICS: V_S = 2.7V (continued)
Test conditions unless otherwise noted: V_S+ = 2.7 V, V_S– = 0V, CM = open, V_OUT = 2Vpp, R_F = 2kΩ, R_L = 2kΩ Differential, G =
1V/V, Single-Ended Input, Differential Output, Input and Output Referenced to mid-supply unless otherwise noted.
TWO-TONE, 2^nd and 3^rdORDER INTERMODULATION
DISTORTION vs FREQUENCY
−10
V_S = 2.7 V
−20 _{G = 1 V/V}
R_F = 2 kΩ
−30 _{RL = 2 kΩ}
V_OUT = 2 V_pp Envelope
−40
−50
−60
SINGLE-ENDED OUTPUT VOLTAGE SWING
vs
LOAD RESISTANCE
2.5
V_OUT MAX
V_OUT MIN
2
1.5
V_S = 2.7 V
G = 2 V/V
1
R_F = 2 kΩ
−70
−80
−90
1
Second Intermodulation
Third Intermodulation
Frequency (MHz)
10
G012
Figure 14.
0.5
0
50 100
1k
Load Resistance (Ω)
Figure 15.
10k
G013
SINGLE-ENDED OUTPUT SATURATION VOLTAGE
vs
LOAD CURRENT
1
V_SAT High
V_SAT Low
0.8
0.6
V_S = 2.7 V
G = 2 V/V
0.4 RF = 2 kΩ
0.2
MAIN AMPLIFIER DIFFERENTIAL OUTPUT IMPEDANCE
vs
FREQUENCY
100
V_S = 2.7 V
G = 1 V/V
R_F = 2 kΩ
10 V_OUT = 100 mV_pp
1
0.1
0
0.1
1
10
Differential Load Current (mA)
Figure 16.
FREQUENCY RESPONSE
vs
C_LOAD
3
0
−3 _{VS = 2.7 V, G = 1 V/V}
−6
R_F = 2 kΩ, R_L = 2 kΩ
V_OUT = 100 mV_pp
−9
−12
−15
−18
−21
100k
C_L = 0 pF, R_O = 0 Ω
C_L = 15 pF, R_O = 200 Ω
C_L = 39 pF, R_O = 100 Ω
C_L = 120 pF, R_O = 50 Ω
C_L = 470 pF, R_O = 20 Ω
C_L = 1200 pF, R_O = 12 Ω
1M
10M
Frequency (Hz)
Figure 18.
30
G014
100M
G016
0.01
10k
200
100
100k
1M
Frequency (Hz)
Figure 17.
R_O
vs
C_LOAD
10M
40M
G015
10
1
1
10
100
C_LOAD (pF)
Figure 19.
V_S = 2.7 V
G = 1 V/V
R_F = 2 kΩ
R_L = 2 kΩ
1k 2k
G017
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