OPA830

1.5kΩ

1.87kΩ

500Ω

+5V

1.87kΩ

4V

I

I

V

150pF

0.1 µF

1MHz, 2nd−Order

Butterworth Filter

100pF

432Ω

137Ω

0.1µF

OPA830-EP

www.ti.com

SBOS655 – MARCH 2014

Typical Applications (continued)

8.2.1.4 Design Requirements

For the non-inverting amplifier with reduced peaking design, the design parameters needed in Figure 59 with

noise gain = 2 are listed in Table 1.

Table 1. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

20

Ω

20

Ω

40.2

Ω

8.2.1.5 Detailed Design Procedure

8.2.1.5.1

Demonstration Boards

Two printed circuit boards (PCBs) are available to assist in the initial evaluation of circuit performance using the

OPA830 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 2.

Table 2. Demonstration Fixtures by Package

PRODUCT

PACKAGE

ORDERING NUMBER

LITERATURE NUMBER

OPA830ID

SO-8

DEM-OPA-SO-1A

SBOU009

OPA830IDBV

SOT23-5

DEM-OPA-SOT-1A

SBOU010

The demonstration fixtures can be requested at the Texas Instruments web site (www.ti.com) through the

OPA830 product folder.

Figure 55. Single-Supply, High-Frequency Active Filter

8.2.1.5.2

Macromodel and Applications Support

Computer simulation of circuit performance using SPICE is often a quick way to analyze the performance of the

OPA830 and its circuit designs. This is particularly true for video and RF amplifier circuits where parasitic

capacitance and inductance can play a major role on circuit performance. A SPICE model for the OPA830 is

available through the product folder on www.ti.com. The applications department is also available for design

assistance. These models predict typical small signal AC, transient steps, DC performance, and noise under a

wide variety of operating conditions. The models include the noise terms found in the electrical specifications of

the data sheet. These models do not attempt to distinguish between the package types in their small-signal AC

performance.

Copyright © 2014, Texas Instruments Incorporated

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Product Folder Links: OPA830-EP