THS4531A Datasheet, PDF (14/51 Pages) Texas Instruments – Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier

THS4531A
SLOS823A – DECEMBER 2012 – REVISED JANUARY 2013
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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.
−20
V_S = 2.7 V
−30 _{G = 1 V/V}
R_F = 2 kΩ
−40 _{RL = 2 kΩ}
−50
−60
−70
REJECTION RATIO
vs
FREQUENCY
TURN-ON TIME
3
1.5
2
1
V_S = 2.7 V
G = 1 V/V
R_F = 2 kΩ
R_L = 200 Ω
1
0.5
−80
−90
−100
100k
1M
Frequency (Hz)
Figure 20.
CMRR
PSRR
10M
30M
G018
Power Down
V_OUT
0
0
0
200
400
600
800
1000
Time (ns)
G019
Figure 21.
INPUT-REFERRED VOLTAGE NOISE
and
TURN-OFF TIME
CURRENT NOISE SPECTRAL DENSITY
3
1.5
100
100
Power Down
V_OUT
Voltage Noise
Current Noise
2
1
10
10
V_S = 2.7 V
G = 1 V/V
R_F = 2 kΩ
R_L = 200 Ω
1
0.5
1
1
0
0
0
10
20
30
40
50
Time (ns)
G020
Figure 22.
120
110
100
90
80
70
60
50
40
30
20
10
0
10
MAIN AMPLIFIER DIFFERENTIAL
OPEN-LOOP GAIN and PHASE
vs
FREQUENCY
0
Magnitude
Phase
−45
−90
−135
−180
100 1k 10k 100k 1M 10M 100M
Frequency (Hz)
G022
Figure 24.
0.1
10
0.1
100
1k
10k
100k
1M
Frequency (Hz)
G021
Figure 23.
OUTPUT BALANCE ERROR
vs
−30
V_S = 2.7 V
G = 1 V/V
−40 RF = 2 kΩ
R_L = 2 kΩ
FREQUENCY
−50
−60
−70
−80
100k
1M
10M
Frequency (Hz)
Figure 25.
30M
G023
14
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