Texas Instruments VCA8500BOARD 8-Channel VGA + LNP Devlopment Board VCA8500BOARD VCA8500BOARD 数据表

The Texas Instruments VCA8500BOARD evaluation module makes it easy to evaluate the performance of
the TI VCA8500 variable gain amplifier. This user's guide provides a description of the evaluation module
and its operation, schematic diagram, bill of materials, and the printed-circuit board layout.

If going from a Rev B BOARD to a Rev C BOARD, /CS has been changed to RESET.

1

Description

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2

Initial Configuration

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2.1

Power Supply

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3

Signals

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3.1

Input Signals

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3.2

Output Signals

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3.3

TGC Outputs

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3.4

CW Outputs

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4

Microcontroller

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5

Modes of Operation

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5.1

Default-Power-Up Mode

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5.2

PC Control Mode

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5.3

Direct Control Mode

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6

VCA8500BOARD Full-Access Software

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6.1

Loading the Software

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6.2

Initial Start-up Screen

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6.3

Other Program Functions

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7

Printed-Circuit Board Layout, Bill of Materials, and Schematic

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7.1

Printed-Circuit Board Layout

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7.2

Bill of Materials

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7.3

Schematic

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1

CW Output Circuit

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2

Initial Start-up Screen

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3

Main Program Window

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4

CW Options Selection

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5

Silkscreen — Top Layer

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6

Ground

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7

Power Plane 1

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8

Power Plane 2

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9

Ground

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10

Silkscreen — Bottom Layer

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11

Schematic Pg.1

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12

Schematic Pg.2

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1

Bill of Materials

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1

SLOU216B – January 2008 – Revised January 2013

Copyright © 2008–2013, Texas Instruments Incorporated