OPA2889 Datasheet, PDF (21/35 Pages) Burr-Brown (TI) – Dual, Low-Power, Wideband, Voltage Feedback OPERATIONAL AMPLIFIER with Disable

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R_1A
402W
V_IN
R_1B
402W
+12V
6kW
V_CM ^50W
1000pF
6kW
R3A
232W
1/2
OPA2889
C_1A
129pF
R_2A
402W
C₂
257pF
R_2B
402W
R3B
232W
C_1B
129pF
V_OUT
1/2
50W
OPA2889
V_CM
OPA2889
SBOS373 – JUNE 2007
Figure 59. Single-Supply, MFB Active Filter, 2MHz LP Butterworth
DESIGN-IN TOOLS
DEMONSTRATION FIXTURES
Two printed circuit boards (PCBs) are available to
assist in the initial evaluation of circuit performance
using the OPA2889 in its two package options. Both
of these are offered free of charge as unpopulated
PCBs, delivered with a user’s guide. The summary
information for these fixtures is shown in Table 1.
Table 1. Demonstration Fixtures by Package
PRODUCT
OPA2889ID
OPA2889IDGS
LITERATURE
PACKAGE ORDERING NUMBER NUMBER
SO-8
DEM-OPA-SO-2A
SBOU003A
MSOP-10 DEM-OPA-MSOP-2B SBOU040
The demonstration fixtures can be requested at the
Texas Instruments web site (www.ti.com) through the
OPA2889 product folder.
MACROMODELS
Computer simulation of circuit performance using
SPICE is often useful when analyzing the
performance of analog circuits and systems. This
principle is particularly true for video and RF amplifier
circuits where parasitic capacitance and inductance
can have a major effect on circuit performance. A
SPICE model for the OPA2889 is available through
the Texas Instruments web page (www.ti.com). This
model does a good job of predicting small-signal ac
and transient performance under a wide variety of
operating conditions. It does not do as well in
predicting the harmonic distortion or dG/dP
characteristics. This model does not attempt to
distinguish between the package types in their
small-signal ac performance.
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