THS7001_16 Datasheet, PDF (13/41 Pages) Texas Instruments – 70-MHz PROGRAMMABLE-GAIN AMPLIFIERS

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PGA HARMONIC
DISTORTION
vs
FREQUENCY
−30
RL= 1 kΩ
−40 ^{Gain=+8 dB}
VO(PP)= 2 V
VCC=±5 V
2nd Harmonic
−50
−60
VCC=±15 V
2nd Harmonic
VCC=±15 V
3rd Harmonic
−70
−80
−90
−100
100k
VCC=±5 V
3rd Harmonic
1M
10M
f − Frequency − Hz
Figure 38
THS7001, THS7002
70ĆMHz PROGRAMMABLEĆGAIN AMPLIFIERS
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SLOS214C − OCTOBER 1998 − REVISED MARCH 2007
TYPICAL CHARACTERISTICS
PGA HARMONIC DISTORTION
vs
OUTPUT VOLTAGE
−40
VCC ± 5 V
VCC ± 15 V
−50 ^{2nd Harmonic}
2nd Harmonic
PGA SLEW RATE
vs
FREE-AIR TEMPERATURE
220
VCC=+/−15 V
200
VO(P-P)=20 V
−60
−70
VCC ± 15V
3rd Harmonic
−80
VCC ± 5 V
3rd Harmonic
−90
RL = 1 kΩ
G= +8 dB
−100
f = 1 MHz
0 2.5 5 7.5 10 12.5 15 17.5 20
VO(PP) − Peak -To-Peak Output Volage − V
Figure 39
180
160
140
VCC=+/−5 V
VO(P-P)=5 V
120
RL=1 k Ω
100
−40 −20 0
20 40 60 80 100
TA − Free-Air Temperature − °C
Figure 40
PGA CLAMP ACCURACY
vs
FREE-AIR TEMPERATURE
300
VH − 15V
15-V Condition:
200
VH, VL = ±10 V
VI = ±10 V
100 _{VH − 5V}
0
−100
VL − 15V
5-V Condition:
VH, VL = ±2 V
VI = ±2 V
−200
VL − 5V
−300
−40 −20 0
G = +2 dB
20 40 60 80 100
TA − Free-Air Temperature − _C
Figure 41
PGA CLAMP RESPONSE
4
3
Unclamped
Output
2
1
Clamped
Output
0
VH = 2 V
VL = −2 V
−1
−2
VCC = ±5 V
−3
Gain = 1,0,0 (+ 2 dB)
RL = 500 Ω
−4
0
100 200 300 400 500
t − Time − ns
Figure 42
PGA CLAMP RESPONSE
4
3
2
1
Clamped Output
VL = 0 V
0
−1
Unclamped Output
−2
VCC = +15 V, +5 V
−3
Gain = 1,0,0 (+2 dB)
VH = VCC+
−4
0
100 200 300 400 500
t − Time − ns
Figure 43
PGA CLAMP RESPONSE
12
10
Unclamped
Output
8
6
4
Clamped
Output
2
VH = 5 V
0
VCC = +15 V
Gain = 1,0,0 (+2 dB)
−2
VL = VCC−
−4
0
50
100
150 200 250
t − Time − ns
Figure 44
SHUTDOWN ISOLATION
vs
FREQUENCY
−20
VCC = ± 5 V & ± 15 V
−30 ^{VI(PP) = 2.5 V}
−40
Preamp: Forward Iso.
Preamp: Reverse Iso.
−50
−60
−70
−80
−90
−100
100k
PGA: Forward Iso.
PGA: Reverse Iso.
1M
10M
100M 500M
f − Frequency − Hz
Figure 45
PGA SHUTDOWN RESPONSE
VSHDN (5 V/Div)
VCC = ±5 V,±15
Gain = 1,0,1
(+8 dB)
RL = 500 Ω
RL = ∞
VOUT
(500 mV/Div)
0 100 200 300 400 500 600 700 800 9001000
t − Time − ns
Figure 46
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