THS4531 Datasheet, PDF (14/55 Pages) Texas Instruments – Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier

THS4531
SLOS358B – SEPTEMBER 2011 – REVISED MARCH 2012
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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.
SINGLE-ENDED OUTPUT SATURATION VOLTAGE
vs
LOAD CURRENT
1
V_SAT High
V_SAT Low
0.8
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
0.6
V_S = 2.7 V
G = 2 V/V
1
0.4 RF = 2 kΩ
0.1
0.2
0
0.1
1
10
30
Differential Load Current (mA)
G014
Figure 16.
0.01
10k
100k
1M
Frequency (Hz)
Figure 17.
10M
40M
G015
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.
100M
G016
200
100
10
1
1
R_O
vs
C_LOAD
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
14
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