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MX029 Datasheet

  • MX029

  • Dual Digitally Controlled Amplifier

  • 13頁

  • CMLMICRO

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DATA BULLETIN
MX029
Features




Dual Digitally Controlled Amplifier
PRELIMINARY INFORMATION
Applications





Cellular and LMR Radios
PABX鈥檚, Electronic Mail, TAM's
Automatic Test Equipment
Remote Gain Adjustments
Digitally Set Audio Control Levels
2 Digitally Controlled Amplifiers
鹵48dB Gain/Attenuation in 2dB Steps + Mute
Individual Control with a 14-Bit Serial Word
Separate Fixed Gain Buffer Amplifier
SERIAL CLOCK
DATA INPUT
LOAD/LATCH
SERIAL
INTERFACE
V
DD
STAGE 1 CONTROL REGISTER
V
SS
BIAS
V
SS
BIAS
CH1, INPUT 1
CH1, INPUT 2
CH1, INPUT 3
TO STAGE 1
CONTROL
REGISTER
CH1, OUTPUT 1
鈭?/div>
G
CH1, OUTPUT 2
V
SS
BIAS
STAGE 1 CONTROL REGISTER
V
SS
CH2, INPUT 1
BIAS
鈭?/div>
G
CH2, INPUT 2
CH2, OUTPUT 1
UNIVERSAL
AMP IN
UNIVERSAL
AMP OUT
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.
www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054
Doc. # 20480096.008
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA.
All trademarks and service marks are held by their respective companies.

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  • 英文版
    Dual Digitally Controlled Amplifier
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    Digitally Controlled Gain Amplifier
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