DATA BULLETIN

MX019

1998 MX-COM, INC.

www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054

Doc. # 20480077.006

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

All trademarks and service marks are held by their respective companies

Quad Digital Control Amplifier

FEATURES

APPLICATIONS

 4 Digitally Controlled Amplifiers

 15 Gain/Attenuation Steps

 3 Amplifiers

± 3dB Range in 0.43dB Steps

 1 'Volume' Amplifier

±14dB Range in 2dB Steps

 8-Bit Serial Data Control

 Output Mute Function

 Gain Control Applications

Audio

Data

 Telecommunications, Radio, & Industrial

Applications

2

3

3

3

4

4

SERIAL

DATA

INPUT

LOAD/LATCH

LOAD/LATCH

CHIP

ADDRESS

1

1

2

2

Ch1

Ch2

Ch4

Ch3

V

DD

V

BIAS

SERIAL

CLOCK

INPUT

8-BIT

SERIAL

DATA

INPUT

CONTROLLED

AUDIO

OUTPUT

LINES

VOLUME

The MX019 Digitally Adjustable Amplifier Array replaces trimmer potentiometers and volume controls in

Cellular, LMR, Telephony and Communication applications where voice or data signals need adjustment.

The MX019 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, while 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 MX019s in a system. The MX019 uses the host microprocessor to digitally control the set-up of all

audio levels during development, production/calibration, and operation. Such applications include:

1. 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.

2. Automatic Dynamic Compensation of drift caused by variations in temperature, linearity, etc.

3. Fully automated servicing and re-alignment.

The MX019 is a low-power, single 5-volt CMOS device available in 24-pin TSSOP (MX019TN), 16-pin SOIC

(MX019DW), 16-pin CDIP (MX019J) and 16-pin PDIP (MX019P) package versions.