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OPA698

V

L

V

H

Open

Open

V

L

V

H

V

OUT

R

3

402

Ω

R

4

75

Ω

OPA698

R

1

75

Ω

R

2

402

Ω

V

IN

-0.2V

S0046-01

DESIGN-IN TOOLS

Applications Support

Demonstrations Boards

OPERATING SUGGESTIONS

Theory of Operation

OPA698M

SGLS287A – MAY 2005 – REVISED MARCH 2006

TYPICAL APPLICATIONS (continued)

Figure 65. Sync Stripper Circuit

The Texas Instruments Applications Department is available for design assistance at 1-972-644-5580. The Texas

Instruments web site (www.ti.com) has the latest product data sheets and other design aids.

A PC board is available to assist in the initial evaluation of circuit performance of the OPA698ID. It is available as

an unpopulated PCB with descriptive documentation. See the demonstration board literature for more

information. The summary information for this board is shown in Table 1.

Table 1. Demo Board Summary Information

PRODUCT

PACKAGE

BOARD

LITERATURE

PART NO.

REQUEST NO.

OPA698ID

SO-8

DEM-OPA-SO-1A

SBOU009

This board can be requested through the Texas Instruments web site.

The OPA698 is a voltage-feedback op amp that is unity-gain stable. The output voltage is limited to a range set

by the voltage on the limiter pins (5 and 8). When the input tries to overdrive the output, the limiters take control

of the output buffer. This action from the limiters avoids saturating any part of the signal path, giving quick

overdrive recovery and excellent limiter accuracy at any signal gain. The limiters have a sharp transition from the

linear region of operation to output limiting. This transition allows the limiter voltages to be set near (<100 mV)

the desired signal range. The distortion performance is also good near the limiter voltages.

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