Datasheet > FX019DW

FX019DW

更新时间： 2024-11-22 23:53:11

品牌	Logo	应用领域
其他 - ETC		商用集成电路放大器光电二极管
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6页	61K
描述
Digitally Controlled Gain Amplifier

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FX019DW 数据手册

CML Semiconductor Products

PRODUCT INFORMATION

Digitally Controlled

Quad Amplifier Array

FX019

Publication D/019/4 December 1995

Features

4 Digitally Controlled Amplifiers

8-Bit Serial Data Control

Output Mute Function

15 Gain/Attenuation Steps

Audio and Data Gain Control

Applications

3 Amplifiers, with a ± 3dB Range

in 0.43dB Steps

Telecoms, Radio and Industrial

Applications

1 'Volume' Amplifier, with a

± 14dB Range in 2dB Steps

SERIAL CLOCK

INPUT

LOAD/LATCH

8-BIT SERIAL DATA INPUT

AND

LINE DECODERS

SERIAL DATA

INPUT

LOAD/LATCH

VOLUME

Ch4

Ch1

FX019

V_SS

V_DD

CHIP SELECT

V_BIAS

Ch2

Ch3

CONTROLLED AUDIO OUTPUT LINES

Fig.1 Functional Block Diagram

Brief Description

The FX019 Digitally Adjustable Amplifier Array is

available to replace trimmer potentiometers and

volume controls in Cellular, PMR, Telephony and

Communications applications where d.c., voice or

data signals need adjustment.

This product replaces the need for manual trimming

of audible signals by using the host microprocessor to

digitally control the set-up of all audio levels during

development, production/calibration and operation.

Applications include:

The FX019 is a single-chip LSI consisting of four

digitally controlled amplifier stages, each with 15

distinct gain/attenuation steps. Control of each

individual amplifier is by an 8-bit serial data stream.

Three of the amplifier stages offer a +/-3dB range in

steps of 0.43dB, whilst the remaining amplifier offers a

+/-14dB range in steps of 2dB, and is suggested for

volume control applications. Each amplifier includes a

16th 'Off' state which when applied, mutes the output

audio from that channel. This array uses a Chip

Select input to select one of two FX019s in a system.

(i) Control, adjustment and set-up of communications

equipment by an Intelligent ATE without manual

intervention – eg. Deviation, Microphone and L/S

Levels, Rx Audio Level etc.

(ii) Automatic Dynamic Compensation of drift caused

by variations in temperature, linearity, etc.

(iii)Fully automated servicing and re-alignment.

The FX019 is a low-power, single 5-volt CMOS

device available in plastic DIL and Small Outline

(S.O.I.C.) SMD package versions.

12 3 4 5 6

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