DataSheet.es    


PDF NCY9100 Data sheet ( Hoja de datos )

Número de pieza NCY9100
Descripción Compandor
Fabricantes ON Semiconductor 
Logotipo ON Semiconductor Logotipo



Hay una vista previa y un enlace de descarga de NCY9100 (archivo pdf) en la parte inferior de esta página.


Total 10 Páginas

No Preview Available ! NCY9100 Hoja de datos, Descripción, Manual

NCY9100
Compandor
The NCY9100 is a versatile low cost dual gain control circuit in
which either channel may be used as a dynamic range compressor or
expandor. Each channel has a fullwave rectifier to detect the average
value of the signal, a linerarized temperaturecompensated variable
gain cell, and an operational amplifier.
The NCY9100 is well suited for use in cellular radio and radio
communications systems, modems, telephone, and satellite
broadcast/receive audio systems.
Features
Complete Compressor and Expandor in one IChip
Temperature Compensated
Greater than 110 dB Dynamic Range
Operates Down to 6.0 VDC
System Levels Adjustable with External Components
Distortion may be Trimmed Out
Dynamic Noise Reduction Systems
Voltage Controlled Amplifier
This is a PbFree Device
Applications
Cellular Radio
High Level Limiter
Low Level Expandor Noise Gate
Dynamic Filters
CD Player
http://onsemi.com
16
1
SOIC16 WB
D SUFFIX
CASE 751G
A
WL
YY
WW
G
MARKING
DIAGRAMS
16
NCY9100
AWLYYWWG
1
= Assembly Location
= Wafer Lot
= Year
= Work Week
= PbFree Package
PIN CONNECTIONS
RECT CAP 1 1
RECT IN 1 2
DG CELL IN 1 3
GND 4
INV. IN 1 5
RES. R3 1 6
OUTPUT 1 7
THD TRIM 1 8
16 RECT CAP 2
15 RECT IN 2
14 DG CELL IN 2
13 VCC
12 INV. IN 2
11 RES. R3 2
10 OUTPUT 2
9 THD TRIM 2
TOP VIEW
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
*For additional information on our PbFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2009
April, 2009 Rev. 0
1
Publication Order Number:
NCY9100/D

1 page




NCY9100 pdf
NCY9100
INTRODUCTION
Much interest has been expressed in high performance
electronic gain control circuits. For noncritical
applications, an integrated circuit operational
transconductance amplifier can be used, but when
highperformance is required, one has to resort to complex
discrete circuitry with many expensive, wellmatched
components. This paper describes an inexpensive integrated
circuit, the NCY9100 Compandor, which offers a pair of
high performance gain control circuits featuring low
distortion (<0.1%), high signaltonoise ratio (90 dB), and
wide dynamic range (110 dB).
Circuit Background
The NCY9100 Compandor was originally designed to
satisfy the requirements of the telephone system. When
several telephone channels are multiplexed onto a common
line, the resulting signaltonoise ratio is poor and
companding is used to allow a wider dynamic range to be
passed through the channel. Figure 4 graphically shows
what a compandor can do for the signaltonoise ratio of a
restricted dynamic range channel. The input level range of
+20 to 80 dB is shown undergoing a 2to1 compression
where a 2.0 dB input level change is compressed into a
1.0 dB output level change by the compressor. The original
100 dB of dynamic range is thus compressed to a 50 dB
range for transmission through a restricted dynamic range
channel. A complementary expansion on the receiving end
restores the original signal levels and reduces the channel
noise by as much as 45 dB.
The significant circuits in a compressor or expander are
the rectifier and the gain control element. The phone system
requires a simple fullwave averaging rectifier with good
accuracy, since the rectifier accuracy determines the (input)
output level tracking accuracy. The gain cell determines the
distortion and noise characteristics, and the phone system
specifications here are very loose. These specs could have
been met with a simple Operational Transconductance
Multiplier, or OTA, but the gain of an OTA is proportional
to temperature and this is very undesirable. Therefore, a
linearized transconductance multiplier was designed which
is insensitive to temperature and offers low noise and low
distortion performance. These features make the circuit
useful in audio and data systems as well as in
telecommunications systems.
Basic Hookup and Operation
Figure 5 shows the block diagram of one half of the chip,
(there are two identical channels on the IC). The fullwave
averaging rectifier provides a gain control current, IG, for the
variable gain (DG) cell. The output of the DG cell is a current
which is fed to the summing node of the operational
amplifier. Resistors are provided to establish circuit gain and
set the output DC bias.
The circuit is intended for use in single power supply
systems, so the internal summing nodes must be biased at
some voltage above ground. An internal band gap voltage
reference provides a very stable, low noise 1.8 V reference
denoted VREF. The noninverting input of the op amp is tied
to VREF, and the summing nodes of the rectifier and DG cell
(located at the right of R1 and R2) have the same potential.
The THD trim pin is also at the VREF potential.
INPUT
LEVEL
+20
0dB
OUTPUT
LEVEL
20
0dB
40
NOISE
80
40
80
Figure 4. Restricted Dynamic Range Channel
GIN
3,14
RECTIN
THD TRIM
R3 INVIN
8,9
R3
6,11 5,12
R2
20kW
R1
20kW
DG
IG
R4
30kW
VREF +
1.8V
OUTPUT
7,10
2,15 10kW
1,16
VCC PIN 13
GND PIN 4
CRECT
Figure 5. Chip Block Diagram (1 of 2 Channels)
http://onsemi.com
5

5 Page










PáginasTotal 10 Páginas
PDF Descargar[ Datasheet NCY9100.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
NCY9100CompandorON Semiconductor
ON Semiconductor

Número de piezaDescripciónFabricantes
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


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.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar