Datasheet

6kW
R
2A
402W
C
1A
128.7pF
C
2
257.4pF
C
1B
128.7pF
R
1A
402W
R
1B
402W
R3A
232W
R3B
232W
50W
6kW
+12V
V
CM
V
CM
V
OUT
V
IN
1000pF
50W
1/2
OPA2890
1/2
OPA2890
R
2B
402W
OPA2890
www.ti.com SBOS364C –DECEMBER 2007–REVISED DECEMBER 2009
Figure 58. Single-Supply, MFB Active Filter, 2MHz LP Butterworth
DESIGN-IN TOOLS MACROMODELS
Computer simulation of circuit performance using
SPICE is often useful when analyzing the
DEMONSTRATION FIXTURES
performance of analog circuits and systems. This
Two printed circuit boards (PCBs) are available to
principle is particularly true for video and RF amplifier
assist in the initial evaluation of circuit performance
circuits where parasitic capacitance and inductance
using the OPA2890 in its two package options. Both
can have a major effect on circuit performance. A
of these are offered free of charge as unpopulated
SPICE model for the OPA2890 (use two OPA890
PCBs, delivered with a user’s guide. The summary
SPICE models) is available through the Texas
information for these fixtures is shown in Table 1.
Instruments web page (www.ti.com). This model does
a good job of predicting small-signal ac and transient
Table 1. Demonstration Fixtures by Package
performance under a wide variety of operating
conditions. It does not do as well in predicting the
LITERATURE
PRODUCT PACKAGE ORDERING NUMBER NUMBER
harmonic distortion or dG/dP characteristics. This
OPA2890ID SO-8 DEM-OPA-SO-2A SBOU003
model does not attempt to distinguish between the
package types in small-signal ac performance.
OPA2890IDG MSOP-10 DEM-OPA-MSOP-2B SBOU040
S
The demonstration fixtures can be requested at the
Texas Instruments web site (www.ti.com) through the
OPA2890 product folder.
Copyright © 2007–2009, Texas Instruments Incorporated Submit Documentation Feedback 21
Product Folder Link(s): OPA2890