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OPA2832 Datasheet(PDF) 19 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part # OPA2832
Description  Triple, Low-Power, High-Speed, Fixed-Gain Operational Amplifier
PDF  32 Pages
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Manufacturer  BURR-BROWN [Burr-Brown (TI)]
Direct Link  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

OPA2832 Datasheet(HTML) 19 Page - Burr-Brown (TI)

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OPA3832
+5V
-
5V
V
O
50W
V
IN
400W
175W
50
Source
W
150W
400W
6.8 F
m
+
6.8 F
m
+
0.1 F
m
0.1 F
m
0.01 F
m
SINGLE-SUPPLY ACTIVE FILTER
9
6
3
0
-
3
-
6
-
9
-
12
-
15
-
18
Frequency(Hz)
100
1k
10k
100k
1M
10M
1/3
OPA3832
400W
2kW
400W
+5V
3kW
2V
I
V
I
300pF
0.1 F
m
1MHz,2nd-Order
ButterworthFilter
470pF
866W
205W
0.1 F
m
OPA3832
SBOS370 – DECEMBER 2006
pole set to 3.2kHz for the component values shown).
As discussed for Figure 46, this configuration allows
the midpoint bias formed by one 2k
Ω and one 3kΩ
resistor to appear at both the input and output pins.
The midband signal gain is set to +2 (6dB) in this
case. The capacitor to ground on the noninverting
input is intentionally set larger to dominate input
parasitic terms. At a gain of +2, the OPA3832 on a
single
supply
will
show
80MHz
small-
and
large-signal bandwidth. The resistor values have
been slightly adjusted to account for this limited
bandwidth in the amplifier stage. Tests of this circuit,
shown in Figure 49, illustrate a precise 1MHz, –3dB
point with a maximally-flat passband (above the
3.2kHz ac-coupling corner), and a maximum stop
band attenuation of 36dB.
Figure 48. DC-Coupled, G = +2, Bipolar Supply
Specification and Test Circuit
The OPA3832, while operating on a single +3.3V or
+5V supply, lends itself well to high-frequency active
filter designs. Again, the key additional requirement
is to establish the dc operating point of the signal
near the supply midpoint for highest dynamic range.
Figure 50 shows an example design of a 1MHz
low-pass Butterworth filter using the Sallen-Key
topology.
Figure 49. 1MHz, 2nd-Order, Butterworth
Both the input signal and the gain setting resistor are
Low-Pass Filter
ac-coupled using 0.1
µF blocking capacitors (actually
giving bandpass response with the low-frequency
Figure 50. Single-Supply, High-Frequency Active Filter
19
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