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FX806ALS

更新时间： 2024-01-26 12:51:15
品牌 Logo 应用领域
CMLMICRO 电信集成电路电信电路
页数 文件大小 规格书
13页 163K
描述
AUDIO PROCESSOR

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FX806ALS 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：LCC包装说明：QCCJ-24
针数：24Reach Compliance Code：compliant
HTS代码：8542.39.00.01风险等级：5.83
JESD-30 代码：S-PQCC-J24JESD-609代码：e2
长度：10.125 mm功能数量：1
端子数量：24最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：QCCJ封装等效代码：LDCC24,.44SQ
封装形状：SQUARE封装形式：CHIP CARRIER
认证状态：Not Qualified座面最大高度：3.7 mm
标称供电电压：5 V表面贴装：YES
技术：CMOS电信集成电路类型：TELECOM CIRCUIT
温度等级：INDUSTRIAL端子面层：Tin/Silver (Sn/Ag)
端子形式：J BEND端子节距：1.27 mm
端子位置：QUAD宽度：10.125 mm
Base Number Matches：1

FX806ALS 数据手册

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FX806A  
AUDIO PROCESSOR  
CHIP  
SELECT  
SERIAL  
CLOCK  
COMMAND  
DATA  
SUM  
OUT  
MOD.  
IN  
MAIN  
PROCESS  
OUT  
POWER  
SUPPLY  
#
C-BUS INTERFACE  
PRIMARY  
and  
MODULATION 1  
OUT  
CALIBRATION INPUT  
SECONDARY  
AUDIO  
INPUTS  
———  
ATTENUATOR  
VOGAD SENSE  
Voice.  
#
#
#
Sub-/Audio  
Tone.  
FFSK.  
TRANSMITTER  
MODULATION  
DRIVES  
#
VOGAD  
SENSE  
VOGAD  
SENSE  
etc.  
MIC. & VOGAD  
AMPS  
(TX)  
MIC. IN  
#
LOW &  
HIGHPASS  
FILTERS  
#
#
#
ATTENUATOR  
#
MODULATION 2  
OUT  
#
INPUT  
PROCESS  
#
PRE-EMPHASIS  
LIMITING  
FILTERING  
GAIN SETTING  
GAIN  
SET  
OUTPUT DRIVES  
MODULATION  
SUMMING  
AMP  
MAIN PROCESS  
(RX)  
AUDIO IN  
DE-EMPHASIS  
FILTER  
# indicates logic control  
#
XTAL/CLOCK  
XTAL  
LOUDSPEAKER  
AUDIO  
BUFFER  
CLOCK  
ATTENUATOR  
GENERATOR  
To EXTERNAL AUDIO  
PROCESSES  
EXTERNAL AUDIO  
PROCESS IN  
Fig.1 FX806A Audio Processor  
Brief Description  
● Main Process  
Intended primarily to operate as the “Audio Terminal” of  
Radio Systems using the DBS 800 Digitally-integrated  
Baseband System, the FX806A is a PMR Audio Processor  
which meets EIA and CEPT audio specifications.  
Using a unique filter line-up, the FX806A offers lower  
distortion versus modulation level figures than conventional  
filter/limiter configurations.  
The FX806A is a half-duplex device whose signal paths  
and level-setting elements are dynamically configured and  
adjusted by digital information sent from the Radio  
µController using “C-BUS” hardware and software protocol.  
Conditioning for Input or External Process signals with  
gain/pre-emphasis, high and lowpass switched capacitor  
filters and a transmitter deviation limiter. The Main Process  
Output may be switched to VBIAS  
.
● Summation and Output Drives  
Main “voice audio” from the Main Process is combined  
with signalling and data from other DBS 800 facilities, to  
provide the composite (in and outband) signal for the digitally  
adjustable Transmitter Modulation Drives.  
Received audio is level (volume) adjusted for output to  
loudspeaker circuitry.  
Signal-level stability and therefore output accuracy, of  
the FX806A is maintained by a voltage-controlled gain  
system (VOGAD) with specific gain sensors that are selected  
automatically by the Internal/External Mode Command. The  
VOGAD system permits high deviation with low distortion.  
This is achieved by reducing the path gain (and so reducing  
the distortion introduced by the Peak Deviation limiter) when  
the input signal is large.  
Signal levels can be controlled to provide ‘dynamic-  
compensation’ for such factors as temperature drift, VCO  
non-linearity, etc.  
FX806A audio output stages can be completely disabled  
or the whole microcircuit placed into a “Powersave” mode,  
leaving only clock and “C-BUS” circuitry active.  
The FX806A is a low-power, 5-volt CMOS integrated  
circuit and is available in 24-pin DIL cerdip and 24-pin/lead  
plastic SMD packages.  
Figure 5 shows a complete functional block diagram of  
the FX806A signal paths which can be viewed as 3 sections:  
● Input Process  
Selectable transmit or receive input paths.  
The transmit path with low-noise input and VOGAD  
amplifiers and bandpass filtered stages provides good signal-  
to-noise performance at low input levels and minimum  
distortion for high-drive modulation signals.  
De-emphasis is software selectable at the Rx Audio Input  
for FM or PM radio configurations.  
This initial audio, after in-line gain adjustment, is  
available for switching to either external audio processes  
(such as scrambling) or internally to the Main Process  
stages.  
Publication D/806A/3 July 1994  
1234567...13

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