DataSheet.es Am79Q02 Hoja de datos PDF



PDF Am79Q02 Datasheet ( Hoja de datos )

Número de pieza Am79Q02
Descripción Quad Subscriber Line Audio-Processing Circuit Devices
Fabricantes Legerity 
Logotipo Legerity Logotipo
Vista previa
Total 30 Páginas
		
Am79Q02 datasheet

1 Page

Am79Q02 pdf
ORDERING INFORMATION
Standard Products
Legerity standard products are available in several packages and operating ranges. The order number (Valid
Combination) is formed by a combination of the elements below.
Am79Q02/021/031
JC
TEMPERATURE RANGE
* C = Commercial (0°C to 70°C;
Relative Humidity = 15% to 95%)
PACKAGE TYPE
J = 44-Pin Plastic Leaded Chip Carrier (PL 044)
Am79Q02/021 Only
32-Pin Plastic Leaded Chip Carrier (PL 032)
Am79Q031
V = 44-Pin Thin Quad Flat Pack (PQT 044)
Am79Q021 Only
DEVICE NUMBER/DESCRIPTION
Am79Q02/021/031
Quad Subscriber Line Audio-Processing Circuit (QSLAC) Device
Valid Combinations
Am79Q02
JC
Am79Q021
JC
Am79Q031
JC
Am79Q021
VC
Valid Combinations
Valid Combinations list configurations planned to
be supported in volume for this device. Consult
the local Legerity sales office to confirm availabil-
ity of specific valid combinations, to check on new-
ly released combinations, and to obtain additional
data on Legeritys standard militarygrade prod-
ucts.
Note:
* Functionality of the device from 0°C to +70°C is guaranteed by production testing. Performance from –40°C to +85°C
is guaranteed by characterization and periodic sampling of production units.
SLAC Products
5

5 Page

Am79Q02 arduino
Pin Names
VOUT1
VOUT4
Type
Outputs
VREF
Output
Description
Analog. The received digital data at DRA or DRB is processed and converted to an analog
signal at the VOUT pin. VOUT1 is the output from channel 1, VOUT2 is the output for channel
2, VOUT3 is the output from channel 3, and VOUT4 is the output for channel 4. The VOUT
voltages are referenced to VREF.
Analog Voltage Reference. The VREF output is provided in order for an external 0.1 µF ca-
pacitor to be connected from VREF to ground, filtering noise present on the internal voltage
reference. VREF is buffered before it is used by internal circuitry. The voltage on VREF is
nominally 2.1 V, and the output resistance is 100 k±30%. The leakage current in the ca-
pacitor must be less than 20 nA.
Power Supply
 AGND
 DGND
 VCCA
 VCCD
Analog ground
Digital ground
+5.0 V analog power supply
+5.0 V digital power supply
Two separate power supply inputs are provided to
allow for noise isolation and proper power supply
decoupling techniques; however, the two pins have a
low impedance connection inside the part. For best
performance, all of the +5.0 power supply pins should
be connected together at the connector of the printed
circuit board, and all of the grounds should be
connected together at the connector of the printed
circuit board.
FUNCTIONAL DESCRIPTION
The QSLAC device performs the codec/filter and two-
to four-wire conversion functions required of the
subscriber line interface circuitry in
telecommunications equipment. These functions
involve converting audio signals into digital PCM
samples and converting digital PCM samples back into
audio signals. During conversion, digital filters are
used to band limit the voice signals. All of the digital
filtering is performed in digital signal processors
operating from a master clock, which can be derived
either from PCLK or MCLK.
Four independent channels allow the QSLAC device to
function as four SLAC devices or two DSLACä
devices. For programming information, each channel
has its own enable bit (EC1, EC2, EC3, and EC4) to
allow individual channel programming. If more than
one Channel Enable bit is High or if all Channel Enable
bits are High, all channels enabled will receive the
programming information written; therefore, a
Broadcast state can be implemented by simply
enabling all channels in the device to receive the
information. The Channel Enable bits are contained in
the Channel Enable register, which is written and read
using Commands 14 and 15. The Broadcast state is
useful in initializing QSLAC devices in a large system.
The user-programmable filters set the receive and
transmit gain, perform the transhybrid balancing
function, permit adjustment of the two-wire termination
impedance, and provide equalization of the receive and
transmit paths. All programmable digital filter
coefficients can be calculated using the AmSLAC4 or
WinSLACsoftware.
Data transmitted or received on the PCM highway can
be 8-bit companded code (with an optional 8-bit
signaling byte in the transmit direction) or 16-bit linear
code. The 8-bit codes appear 1 byte per time slot,
while the 16-bit code appears in two consecutive time
slots. The compressed PCM codes can be either 8-bit
companded A-law or µ-law. The PCM data is read from
and written to the PCM highway in user-programmable
time slots at rates of 128 kHz to 8.192 MHz. The
transmit clock edge and clock slot can be selected for
compatibility with other devices that can be connected
to the PCM highway.
Three configurations of the QSLAC device are
offered with single or dual PCM highways. The
Am79Q02 and Am79Q021 QSLAC devices with dual
and single PCM highways respectively are available
in the 44-pin packages. The Am79Q031JC QSLAC
device is a single PCM highway version in a 32-pin
PLCC package.
PCM Highway
Dual
Single
Single
Programmable I/O
Four
Five
Two
Chopper Clock
Yes
No
No
Package
44 PLCC/TQFP
44 PLCC/TQFP
32 PLCC
Part Number
Am79Q02 JC
Am79Q021 JC (or VC)
Am79Q031 JC
10 Am79Q02/021/031 Data Sheet

10 Page





PáginasTotal 30 Páginas
PDF Descargar[ Am79Q02.PDF ]

Enlace url


Hoja de datos destacado

Número de piezaDescripciónFabricantes
Am79Q02Quad Subscriber Line Audio-Processing Circuit DevicesLegerity
Legerity
Am79Q021Quad Subscriber Line Audio-Processing Circuit DevicesLegerity
Legerity
Am79Q031Quad Subscriber Line Audio-Processing Circuit DevicesLegerity
Legerity


Número de piezaDescripciónFabricantes
SSM2604

Low Power Audio Codec.

Analog Devices
Analog Devices
SLG3NB3331

32.768 kHz and MHz GreenCLK.

Silego
Silego
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices
SDC1741

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


Index : 0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z




www.DataSheet.es    |   2018   |  Contacto  |  Buscar