Datasheet

-12-10 -8 -6
-4
-2 0 2
4
6 8 10 12 14 16 18 20
GainSetting
25
20
15
10
5
0
5
10
15
-
-
-
Gain(dB)
50MHz
100MHz
200MHz
-12-10 -8 -6
-4
-2 0 2
4
6 8 10 12 14 16 18 20
GainSetting
0.15
0.10
0.05
0
0.05
15
0.
-
-
-
-
0.10
0.
20
GainError(dB)
-40 C°
+25 C°
+85 C°
-12-10 -8 -6
-4
-2 0 2
4
6 8 10 12 14 16 18 20
GainSetting
0.04
0.02
0
0.02
0.04
0.06
0.08
-
-
-
-
GainError(dB)
50MHz
100MHz
200MHz
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0.5
1.0
-
-
GainControl(V)
0 100 200 300 400 500
Time(ns)
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
AmplifierOutput(V)
GainControl
GainCode=111111
GainCode=000000
Amplifier
Output
2.5
2.0
1.5
1.0
0.5
0
1.0
0.5
0
0.5
1.0
-
-
GainControl,GainStrobe(V)
AmplifierOutput(V)
Time(50ns/div)
GainCode=
111111
GainCode=
000000
GainStrobe
2.5
2.0
1.5
1.0
0.5
0
1.0
0.5
0
0.5
1.0
-
-
GainControl,GainStrobe(V)
AmplifierOutput(V)
Time(50ns/div)
GainCode=111111
GainCode=
000000
Gain
Strobe
PGA870
www.ti.com SBOS436A –DECEMBER 2009–REVISED FEBRUARY 2011
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.
STEP-TO-STEP GAIN ERROR vs GAIN SETTING
LARGE-SIGNAL GAIN vs GAIN SETTING OVER TEMPERATURE
Figure 7. Figure 8.
STEP-TO-STEP GAIN ERROR vs GAIN SETTING
OVER FREQUENCY GAIN STEP RESPONSE: NO LATCH
Figure 9. Figure 10.
GAIN STEP RESPONSE: LEVEL-TRIGGERED GAIN LATCH GAIN STEP RESPONSE: EDGE-TRIGGERED LATCH
Figure 11. Figure 12.
© 2009–2011, Texas Instruments Incorporated 7
Product Folder Link(s): PGA870