參數(shù)資料
型號(hào)： LUCL9216ARG-D
英文描述： Short-Loop Ringing SLIC with Ground Start
中文描述： 短環(huán)振鈴用戶接口與地面開始
文件頁(yè)數(shù)： 6/48頁(yè)
文件大?。?/td> 1062K
代理商： LUCL9216ARG-D
Preliminary Data Sheet
September 2001
Short-Loop Ringing SLIC with Ground Start
L9216A/G
6
Agere Systems Inc.
Description
(continued)
The L9216 uses a voltage feed-current sense architec-
ture; thus, the transmit gain is a transconductance. The
L9216 transconductance is set via a single external
resistor, and this device is designed for optimal perfor-
mance with a transconductance set at 300 V/A.
The L9216 offers an option for a single-ended to differ-
ential receive gain of either 8 or 2. These options are
mask programmable at the factory and are selected by
choice of code.
A receive gain of 8 is more appropriate when choosing
a first-generation type codec where termination imped-
ance, hybrid balance, and overall gains are set by
external analog filters. The higher gain is typically
required for synthesization of complex termination
impedance.
A receive gain of 2 is more appropriate when choosing
a third-generation type codec. Third-generation codecs
will synthesize termination impedance and set hybrid
balance and overall gains. To accomplish these func-
tions, third-generation codecs typically have both ana-
log and digital gain filters. For optimal signal to noise
performance, it is best to operate the codec at a higher
gain level. If the SLIC then provides a high gain, the
SLIC output may be saturated causing clipping distor-
tion of the signal at tip and ring. To avoid this situation,
with a higher gain SLIC, external resistor dividers are
used. These external components are not necessary
with the lower gain offered by the L9216. See the Appli-
cations section of this data sheet for more information.
The L9216 is internally referenced to 1.5 V. This refer-
ence voltage is output at the V
REF
output of the device.
The SLIC output VITR is also referenced to 1.5 V;
therefore, it must be ac coupled to the codec input.
However, the SLIC inputs RCVP/RCVN
are floating
inputs. If there is not feedback from RCVP/RCVN to
VITR, RCVP/RCVN may be directly coupled to the
codec output. If there is feedback from RCVP/RCVN to
VITR, RCVP/RCVN must be ac coupled to the codec
output.
The L9216 is packaged in a 28-pin PLCC package and
an ultrasmall 48-pin MLCC package. Use L9216A for
gain of eight applications and L9216G for gain of two
applications.
相關(guān)PDF資料
PDF描述
LUCL9216AGF-D Short-Loop Ringing SLIC with Ground Start
LUCL9216AGF-DT Short-Loop Ringing SLIC with Ground Start
LUCL9216GRG-D CONNECTOR ACCESSORY
LUCL9217AAR-D GT 3C 3#16S PIN PLUG
LUCL9217AAR-DT Low-Cost Line Interface with Reverse Battery and PPM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LUCL9216GGF-D 制造商:AGERE 制造商全稱:AGERE 功能描述:Short-Loop Ringing SLIC with Ground Start
LUCL9216GGF-DT 制造商:AGERE 制造商全稱:AGERE 功能描述:Short-Loop Ringing SLIC with Ground Start
LUCL9216GRG-D 制造商:AGERE 制造商全稱:AGERE 功能描述:Short-Loop Ringing SLIC with Ground Start
LUCL9217AAR-D 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and PPM
LUCL9217AAR-DT 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and PPM
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