Datasheet

 
  
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SLOS214C − OCTOBER 1998 − REVISED MARCH 2007
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 29
THS7002 PREAMP
CHANNEL-TO-CHANNEL
CROSSTALK
−40
−60
100k 10M 100M
−90
Crosstalk − dB
f − Frequency − Hz
V
CC
= ±15 V & ±5 V
G = 2
V
O(PP)
= 1.3 V
R
L
= 1 kΩ
R
F
= 499 Ω
1M
Preamp−1 Input
Preamp−2 Output
−80
−50
−70
Preamp−2 Input
Preamp−1 Output
Figure 30
PREAMP-TO-PGA CROSSTALK
vs
FREQUENCY
−40
100k
f − Frequency − Hz
Preamp − Input
PGA − Output
Crosstalk − dB
−50
−60
−70
−80
−90
1M 10M 100M
V
CC
= ±15 V & ±5 V
R
L
= 1 kΩ
Preamp:
G = 2
R
F
= 499 Ω
PGA:
G = +2 dB
PGA − Input
Preamp − Output
Figure 31
nV/ HzInput Referred Voltage Noise −
PGA INPUT REFERRED VOLTAGE
NOISE
vs
FREQUENCY
10k
1k
100
10
10 100 1k 10k 100k
f − Frequency − Hz
1
G = − 22 dB
G = − 10 dBG = − 16 dB
G = − 4 dB
G = + 2 dB
G = + 8 dB
G = +14 dB
G = +20 dB
Figure 32
PGA CHANNEL-TO-CHANNEL
GAIN ACCURACY
vs
GAIN SETTING
Channel-To-Channel Gain Accuracy − %
Gain Setting − dB
0.4
0.3
0.2
0.1
0
−0.1
−25 −20 −15 −10 −5 0 5
−0.2
−0.3
−0.4
10 15 20
V
CC
= 25_ C
V
CC
= ±5 V
V
CC
= ±15 V
Figure 33
−0.4
−0.3
−0.2
−0.1
−0.0
0.1
0.2
0.3
0.4
−40 −20 0 20 40 60 80 100
NORMALIZED PGA GAIN
ACCURACY
vs
TEMPERATURE
T
A
− Free-AiirTemperature − °C
Gain Accuracy − %
V
CC
=±5 V ±15 V
Typical For All Gains
Figure 34
PGA FREQUENCY RESPONSE
26
2
100k 10M 100M
−28
Output Level − dB
f − Frequency − Hz
1M
G = 1,1,1
−22
20
−4
V
CC
= ±15 V
R
L
= 1 kΩ
V
O(PP)
=
0.4 V
−16
−10
8
14
1G
G = 1,1,0
G = 1,0,1
G = 1,0,0
G = 0,1,1
G = 0,1,0
G = 0,0,1
G = 0,0,0
Figure 35
PGA FREQUENCY RESPONSE
26
2
100k 10M 100M
−28
Output Level − dB
f − Frequency − Hz
1M
G = 1,1,1
−22
20
−4
V
CC
= ± 5 V
R
L
= 1 kΩ
V
O(PP)
=
0.4 V
−16
−10
8
14
1G
G = 1,1,0
G = 1,0,1
G = 1,0,0
G = 0,1,1
G = 0,1,0
G = 0,0,1
G = 0,0,0
Figure 36
PGA LARGE AND SMALL
SIGNAL FREQUENCY
RESPONSE
100k 10M 100M
V − Normalized Output Voltage − dBV
f − Frequency − Hz
1M
1G
0
12
V
O(PP)
= 3.2 V
6
V
O(PP)
= 1.6 V
0
V
O(PP)
= 0.8 V
−12
V
O(PP)
= 0.2 V
−6
V
O(PP)
= 0.4 V
V
CC
= ± 5 V
R
L
= 1 kΩ
G = +2 dB
−18
18
Figure 37
PGA LARGE AND SMALL
SIGNAL FREQUENCY
RESPONSE
100k 10M 100M
V − Normalized Output Voltage − dBV
f − Frequency − Hz
1M
0
12
V
O(PP)
= 3.2 V
6
V
O(PP)
= 1.6 V
0
V
O(PP)
= 0.8 V
−12
V
O(PP)
= 0.2 V
−6
V
O(PP)
= 0.4 V
V
CC
= ± 15 V
R
L
= 1 kΩ
G = +2 dB
−18
18
1G