Datasheet

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APPLICATION INFORMATION
WIDEBAND, NONINVERTING OPERATION
_
+
R
F
909 Ω
49.9 Ω
0.1 µF 6.8 µF
−V
S
−15 V
R
G
50 Ω Source
+
V
I
0.1 µF 6.8 µF
+
+V
S
15 V
909 Ω
49.9 Ω
50 Ω LOAD
THS3092
THS3096
SLOS428B – DECEMBER 2003 – REVISED FEBRUARY 2006
the feedback resistor R
F
for maximum performance
and stability. Table 1 shows the optimal gain setting
resistors R
F
and R
G
at different gains to give
The THS3092/6 are unity gain stable 135-MHz
maximum bandwidth with minimal peaking in the
current-feedback operational amplifiers, designed to
frequency response. Higher bandwidths can be
operate from a ±5-V to ±15-V power supply.
achieved, at the expense of added peaking in the
frequency response, by using even lower values for
Figure 52 shows the THS3092 in a noninverting gain
R
F
. Conversely, increasing R
F
decreases the
of 2-V/V configuration typically used to generate the
bandwidth, but stability is improved.
performance curves. Most of the curves were
characterized using signal sources with 50- Ω source
Table 1. Recommended Resistor Values for
impedance, and with measurement equipment
Optimum Frequency Response
presenting a 50- Ω load impedance.
THS3092 and THS3096 R
F
and R
G
values for minimal peaking
with R
L
= 100 Ω
SUPPLY VOLTAGE
GAIN (V/V) R
G
( Ω) R
F
( Ω)
(V)
±15 -- 1.1 k
1
±5 -- 1.1 k
±15 909 909
2
±5 909 909
±15 178 715
5
±5 178 715
±15 66.5 604
10
±5 66.5 604
-1 ±15 and ±5 909 909
-2 ±15 and ±5 402 806
-5 ±15 and ±5 143 715
Figure 52. Wideband, Noninverting Gain
-10 ±15 and ±5 60.4 604
Configuration
Current-feedback amplifiers are highly dependent on
16
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