DATA BULLETIN
MX019
FEATURES
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
SERIAL CLOCK
INPUT
SERIAL DATA
INPUT
2
1
Quad Digital Control Amplifier
APPLICATIONS
Gain Control Applications
Audio
Data
Telecommunications, Radio, & Industrial
Applications
8-BIT SERIAL DATA INPUT
LOAD/LATCH
LOAD/LATCH
3
VOLUME
4
Ch1
Ch4
V
DD
V
BIAS
2
3
V
SS
CHIP ADDRESS
Ch2
Ch3
2
1
4
3
CONTROLLED AUDIO OUTPUT LINES
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.
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
CMLMICRO [ CML MICROCIRCUITS ]
