Datasheet

45
40
35
30
25
20
15
10
NoiseFigure(dB)
-12 -8
-4
0
4
8 12 16 222018141062-2-6-10
Gain(dB)
f=100MHz
R =150
SYS
W
1000
100
10
Output Voltage Noise (nV/ )?Hz
10 100
1 k 10 k 100 k 1 M 10 M 100 M
Frequency (Hz)
Gain = +20 dB
Gain = 11.5 dB-
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
0.25-
1.5
1.2
0.9
0.6
0.3
0
0.3-
-
-
-
-
0.6
0.9
1.2
1.5
DisableSignalAmplitude(V)
AmplifierOutput(V)
100 200 300 400 500
Time(ns)
DisableSignal
AmplifierOutput
1.5
1.0
0.5
0
0.5
1.0
1.5
-
-
-
0.15
0.10
0.05
0
0.05
0.10
0.15
-
-
-
Large-SignalDifferentialOutput(V)
Small-SignalDifferentialOutput(V)
0
5
10 15 20 25
Time(2.5ns/div)
Gain=20dB,R =200 W
L
RightScale
LeftScale
160
150
140
130
120
110
100
4
0
4
8
12
16
20-
-
-
-
-
InputImpedanceMagnitude( )W
InputImpedancePhase( )°
100k 1M 10M 100M
1G
Frequency(Hz)
Magnitude
Phase
-
-
-
-
-
60
80
100
120
140
ForwardIsolation(dB)
0 100 200 300 400 500
Frequency(MHz)
PGA870
SBOS436A –DECEMBER 2009–REVISED FEBRUARY 2011 www.ti.com
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25°C, V
S+
= +5 V, differential input signal, differential V
OUT
= 2 V
PP
, R
L
= 200 Ω differential, G = +20 dB, and input and
output common-mode at internal midsupply reference, unless otherwise noted.
OUTPUT VOLTAGE NOISE vs FREQUENCY NOISE FIGURE vs GAIN
Figure 31. Figure 32.
LARGE- AND SMALL-SIGNAL
DISABLE STEP RESPONSE DIFFERENTIAL PULSE RESPONSE
Figure 33. Figure 34.
FORWARD ISOLATION vs FREQUENCY
IN DISABLED MODE DIFFERENTIAL INPUT IMPEDANCE
Figure 35. Figure 36.
12 © 2009–2011, Texas Instruments Incorporated
Product Folder Link(s): PGA870