поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

ML145554 датащи(PDF) 4 Page - LANSDALE Semiconductor Inc.

номер детали ML145554
подробное описание детали  PCM Codec-Filter
Download  18 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  LANSDALE [LANSDALE Semiconductor Inc.]
домашняя страница  http://www.lansdale.com
Logo LANSDALE - LANSDALE Semiconductor Inc.

ML145554 датащи(HTML) 4 Page - LANSDALE Semiconductor Inc.

  ML145554 Datasheet HTML 1Page - LANSDALE Semiconductor Inc. ML145554 Datasheet HTML 2Page - LANSDALE Semiconductor Inc. ML145554 Datasheet HTML 3Page - LANSDALE Semiconductor Inc. ML145554 Datasheet HTML 4Page - LANSDALE Semiconductor Inc. ML145554 Datasheet HTML 5Page - LANSDALE Semiconductor Inc. ML145554 Datasheet HTML 6Page - LANSDALE Semiconductor Inc. ML145554 Datasheet HTML 7Page - LANSDALE Semiconductor Inc. ML145554 Datasheet HTML 8Page - LANSDALE Semiconductor Inc. ML145554 Datasheet HTML 9Page - LANSDALE Semiconductor Inc. Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 18 page
background image
ML145554, ML145557, ML145564, ML145567
LANSDALE Semiconductor, Inc.
www.lansdale.com
Page 4 of 18
Issue A
serial PCM word, clocked by BCLKX, out of DX. If the FSX
pulse is high for more than eight BCLKX periods, the DX and
TSX outputs will remain in a low–impedance state until FSX is
brought low. The length of the FSX pulse is used to determine
whether the transmit and receive digital I/O conforms to the
Short Frame Sync or to the Long Frame Sync convention.
TSX
Transmit Time Slot Indicator
This is an open–drain output that goes low whenever the DX
output is in a low–impedance state (i.e., during the transmit
time slot when the PCM word is being output) for enabling a
PCM bus driver.
ANLB
Analog Loopback Control Input (ML145564/67 Only)
When held high, this pin causes the input of the transmit RC
active filter to be disconnected from GSX and connected to
VPO+ for analog loopback testing. This pin is held low in
normal operation.
ANALOG
GSX
Gain–Setting Transmit
This output of the transmit gain–adjust operational amplifi-
er is internally connected to the encoder section of the device.
It must be used in conjunction with VFXI– and VFXI+ to set
the transmit gain for a maximum signal amplitude of 2.5 V
peak. This output can drive a 600 Ω load to 2.5 V peak.
VFXI–
Voice–Frequency Transmit Input (Inverting)
This is the inverting input of the transmit gain–adjust
operational amplifier.
VFXI+
Voice–Frequency Transmit Input (Non–Inverting)
This is the non–inverting input of the transmit gain–adjust
operational amplifier.
VFRO
Voice–Frequency Receive Output
This receive analog output is capable of driving a 600 Ω load
to 2.5 V peak.
VPI
Voltage Power Input (ML145564/67 Only)
This is the inverting input to the first receive power ampli-
fier. Both of the receive power amplifiers can be powered
down by connecting this input to VBB.
VPO–
Voltage Power Output (Inverted) (ML145564/67 Only)
This inverted output of the receive push–pull power ampli-
fiers can drive 300 Ω to 3.3 V peak.
VPO+
Voltage Power Output (Non–Inverted) (ML145554/67 Only)
This non–inverted output of the receive push–pull power
amplifier pair can drive 300 Ω to 3.3 V peak.
POWER SUPPLY
GNDA
Analog Ground
This terminal is the reference level for all signals, both ana-
log and digital. It is 0 V.
VCC
Positive Power Supply
VCC is typically 5 V.
VBB
Negative Power Supply
VBB is typically – 5 V.
FUNCTIONAL DESCRIPTION
ANALOG INTERFACE AND SIGNAL PATH
The transmit portion of these codec–filters includes a
low–noise gain setting amplifier capable of driving a 600 Ω
load. Its output is fed to a three–pole anti–aliasing pre–filter.
This pre–filter incorporates a two–pole Butterworth active
low–pass filter, and a single passive pole. This pre–filter is
followed by a single ended–to–differential converter that is
clocked at 256 kHz. All subsequent analog processing uti-
lizes fully differential circuitry. The next section is a
fully–differential, five–pole switched capacitor low–pass fil-
ter with a 3.4 kHz passband. After this filter is a 3–pole
switched–capacitor high–pass filter having a cutoff frequen-
cy of about 200 Hz. This high–pass stage has a transmission
zero at DC that eliminates any DC coming from the analog
input or from accumulated operational amplifier offsets in
the preceding filter stages. The last stage of the high–pass
filter is an autozeroed sample and hold amplifier.
One bandgap voltage reference generator and
digital–to–analog converter (DAC) are shared by the transmit
and receive sections. The autozeroed, switched–capacitor
bandgap reference generates precise positive and negative
reference voltages that are independent of temperature and
power supply voltage. A binary–weighted capacitor array
(CDAC) forms the chords of the companding structure,
while a resistor string (RDAC) implements the linear steps
within each chord. The encode process uses the DAC, the
voltage reference, and a frame–by–frame autozeroed com-
parator to implement a successive–approximation conversion
algorithm. All of the analog circuitry involved in the data
conversion the voltage reference, RDAC, CDAC, and com-
parator are implemented with a differential architecture.
The receive section includes the DAC described above,
asample and hold amplifier, a five–pole 3400 Hz switched-
capacitor low–pass filter with sinX/X correction, and a
two–pole active smoothing filter to reduce the spectral com-
ponents of the switched capacitor filter. The output of the
smoothing filter is a power amplifier that is capable of driv-
ing a 600 Ω load. The ML145564 and ML145567 add a pair
of power amplifiers that are connected in a push–pull con-
figuration; two external resistors set the gain of both of the


Аналогичный номер детали - ML145554

производительномер деталидатащиподробное описание детали
logo
LANSDALE Semiconductor ...
ML145554 LANSDALE-ML145554 Datasheet
1Mb / 18P
   PCM Codec-Filter
ML145554-5P LANSDALE-ML145554-5P Datasheet
1Mb / 18P
   PCM Codec-Filter
ML145554EP LANSDALE-ML145554EP Datasheet
1Mb / 18P
   PCM Codec-Filter
More results

Аналогичное описание - ML145554

производительномер деталидатащиподробное описание детали
logo
KODENSHI_AUK CORP.
KK145567 KODENSHI-KK145567 Datasheet
373Kb / 10P
   PCM CODEC - FILTER
logo
Motorola, Inc
MC145554 MOTOROLA-MC145554 Datasheet
342Kb / 20P
   PCM Codec-Filter
logo
LANSDALE Semiconductor ...
ML145554 LANSDALE-ML145554 Datasheet
1Mb / 18P
   PCM Codec-Filter
logo
Integral Corp.
IL145567 INTEGRAL-IL145567 Datasheet
355Kb / 10P
   PCM CODEC - FILTER
logo
Motorola, Inc
MC145484 MOTOROLA-MC145484 Datasheet
293Kb / 26P
   5V PCM CODEC-FILTER
MC145480 MOTOROLA-MC145480 Datasheet
418Kb / 24P
   5V PCM CODEC-FILTER
logo
National Semiconductor ...
TP3094 NSC-TP3094 Datasheet
186Kb / 19P
   Quad PCM Codec/Filter
logo
NXP Semiconductors
MC145484 NXP-MC145484 Datasheet
607Kb / 28P
   5V PCM Codec-Filter
REV 2 3/98
logo
Motorola, Inc
MC145481 MOTOROLA-MC145481 Datasheet
319Kb / 23P
   3V PCM CODEC-FILTER
logo
LANSDALE Semiconductor ...
ML145506 LANSDALE-ML145506_08 Datasheet
2Mb / 20P
   PCM Codec-Filter Mono-Circuit
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com