Datasheet

10
5
0
5
10
15
-
-
-
Gain(dB)
10 100 1000
Frequency(MHz)
Gain=+5dB
Gain= 11.5dB-
GainAdjustedin0.5-dBSteps
V =200mV
OUT PP
25
20
15
10
5
0
Gain(dB)
10 100 1000
Frequency(MHz)
Gain=+20dB
Gain=+5.5dB
GainAdjustedin0.5-dBSteps
V =200mV
OUT PP
30
25
20
15
10
5
0
5
10
15
20
-
-
-
-
Gain(dB)
10 100 1000
Frequency(MHz)
Gain=20dB
Gain=10dB
Gain=0dB
Gain= 6dB-
DifferentialInput
V =2V
OUT PP
30
25
20
15
10
5
0
5
10
15
20-
-
-
-
Gain(dB)
10 100 1000
Frequency(MHz)
Gain=20dB
Gain=10dB
Gain=0dB
Gain= 6dB-
Single-EndedInput
V =2V
OUT PP
10 100 1000
Frequency(MHz)
25
20
15
10
5
0
Gain(dB)
C =820pF
L
C =470pF
L
C =94pF
L
C =44pF
L
C =
10pF
L
C =
20pF
L
C =
16pF
L
PGA870
R
OS
V
OUT
R
OS
C
L
C
L
100
10
1
R ( )W
OS
1 10 100 1000
CapacitiveLoad(pF)
PGA870
R
OS
V
OUT
R
OS
C
L
C
L
PGA870
SBOS436A –DECEMBER 2009–REVISED FEBRUARY 2011 www.ti.com
TYPICAL CHARACTERISTICS
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.
SMALL-SIGNAL AC RESPONSE SMALL-SIGNAL AC RESPONSE
Gain Adjusted from –11.5 dB to +5 dB Gain Adjusted from +5.5 dB to +20 dB
Figure 1. Figure 2.
LARGE-SIGNAL AC RESPONSE AT FOUR GAINS LARGE-SIGNAL AC RESPONSE AT FOUR GAINS
DIFFERENTIAL INPUT SINGLE-ENDED INPUT
Figure 3. Figure 4.
DIFFERENTIAL FREQUENCY RESPONSE vs CAPACITIVE
LOAD R
OS
vs CAPACITIVE LOAD
Figure 5. Figure 6.
6 © 2009–2011, Texas Instruments Incorporated
Product Folder Link(s): PGA870