MX029

更新时间： 2024-09-15 22:29:43

品牌	Logo	应用领域
CMLMICRO		放大器
页数	文件大小	规格书
13页	173K
描述
Dual Digitally Controlled Amplifier

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MX029 数据手册

DATA BULLETIN

Dual Digitally Controlled Amplifier

PRELIMINARY INFORMATION

MX029

Features

Applications

ꢁ 2 Digitally Controlled Amplifiers

ꢁ Cellular and LMR Radios

ꢁ ±48dB Gain/Attenuation in 2dB Steps + Mute ꢁ PABX’s, Electronic Mail, TAM's

ꢁ Individual Control with a 14-Bit Serial Word

ꢁ Separate Fixed Gain Buffer Amplifier

ꢁ Automatic Test Equipment

ꢁ Remote Gain Adjustments

ꢁ Digitally Set Audio Control Levels

SERIAL CLOCK

SERIAL

INTERFACE

DATA INPUT

LOAD/LATCH

V_DD

STAGE 1 CONTROL REGISTER

V_SS

BIAS

V_SS

BIAS

CH1, INPUT 1

CH1, OUTPUT 1

CH1, OUTPUT 2

CH1, INPUT 2

CH1, INPUT 3

∆

TO STAGE 1

CONTROL

V_SS

BIAS

STAGE 1 CONTROL REGISTER

V_SS

CH2, INPUT 1

CH2, INPUT 2

CH2, OUTPUT 1

∆

UNIVERSAL

AMP OUT

UNIVERSAL

AMP IN

BIAS

The MX029 Digitally Controlled Amplifier Array replaces audio level controls in radio and wireline

communications applications. It is a single-chip LSI circuit comprised of two discrete, digitally controlled gain

sections. Each section has 48 distinct gain steps (+/-48dB of range in 2dB steps) plus MUTE.

As shown in Figure 1, both gain stages have switchable inputs. This switching allows for selection of three

different input signals on one channel and two on the other channel. One of the channels also has output

switching. In addition to two digitally controlled gain stages, there is a general purpose inverting amplifier.

The gain of this amplifier is controlled externally via negative feedback. Control of each gain control section is

accomplished through the serial interface. All switching is accomplished using controlled rise and fall times,

thereby assuring no transients (clicks or pops).

The MX029 requires a single 5-volt supply and is available in the following packages: 16-pin SOIC

(MX029DW), 16-pin CDIP (MX029J), and 24-pin TSSOP (MX029TN).

ꢀ1998 MX-COM, INC.

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

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

Doc. # 20480096.008

All trademarks and service marks are held by their respective companies.

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