MX019

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 VDD VBIAS 2 3 VSS 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 operat...