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MX839DS Datasheet

  • MX839DS

  • Digitally Controlled Analog I/O Processor

  • 168.37KB

  • 20頁

  • ETC

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DATA BULLETIN
MX839
Features
x
4 input intelligent 10 bit A/D monitoring
subsystem
4 High and 4 Low Comparators
External IRQ Generator
Free Running Operation
x
Three 8/10 bit DACs
x
Two Variable Attenuators
x
Selectable A/D Clock Frequencies
x
Full Control via 4-wire Serial Interface
x
Low Power 3.0 Operation
Digitally Controlled
Analog I/O Processor
PRELIMINARY INFORMATION
Applications
x
PCS, Cellular, LMR, Wireless
Transceivers, and General Purpose
x
Monitor and Control:
RSSI, Battery State, Temperature,
VSWR, and Error Voltages
x
Digital Trim and Calibration:
VCOs, TCXO, Power Output, Bias,
Current, IF Gain, Deviation,
Modulation Depth, and Baseband
Gain
RECEIVER
RSSI
VSWR
RF TRANSMITTER
RADIO BATTERY STATE
BATTERY
SYSTEM
4 x 10 bit Free Run A/D
4 x Hi Comparator
4 x Low Comparator
IRQ on Compare
Clock Osc
& Dividers
3x
8/10 bit
DAC
TX POWER
REF. OFFSET TRIM
VCO TRIM
MX839
2x
Variable
Attenuator
MOD 1 OUT
MOD 2 OUT
MOD 1 IN
MOD 2 IN
TRANSMITTER
MODULATOR
TEMPERATURE
C-BUS Interface
& Control Logic
碌C
C-BUS SERIAL BUS 0 : 3
The MX839 is a low power CMOS 碌C peripheral device which provides digitally controlled calibration, trimming, and
monitoring functions for PCS, cellular, LMR, wireless transceivers, and general purpose applications.
Featuring a four input intelligent 10 bit A/D monitoring subsystem, an interrupt generator, three 8/10 bit DACs, and two
variable attenuator functions, the MX839 automatically monitors, produces, and trims up to nine analog signals via a
simple four wire serial control bus. The free running A/D intelligent monitoring subsystem includes independent high and
low limit comparators for each of four analog input signals which can be configured to generate external 碌C interrupts.
The MX839鈥檚 high level of integration reduces end product parts count, component size, and software complexity. MX839
digital trimming functions also reduce manufacturing costs by eliminating manual trimming operations.
Featuring an operating range of 3.0V to 5.5V the MX839 is available in 24-pin SSOP (MX839DS), 24-pin SOIC
(MX839DW), and 24-pin PDIP (MX839P) packages.
漏 1998 MXxCOM Inc.
www.mxcom.com Tele: 800 638-5577 336 744-5050 Fax: 336 744-5054
Doc. # 20480164.002
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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