欢迎访问ic37.com |
会员登录 免费注册
发布采购

TSP5070FNTR 参数 Datasheet PDF下载

TSP5070FNTR图片预览
型号: TSP5070FNTR
PDF下载: 下载PDF文件 查看货源
内容描述: 可编程编解码器/滤波器COMBO第二代 [PROGRAMMABLE CODEC/FILTER COMBO 2ND GENERATION]
分类和应用: 解码器编解码器LTE
文件页数/大小: 32 页 / 283 K
品牌: STMICROELECTRONICS [ ST ]
 浏览型号TSP5070FNTR的Datasheet PDF文件第8页浏览型号TSP5070FNTR的Datasheet PDF文件第9页浏览型号TSP5070FNTR的Datasheet PDF文件第10页浏览型号TSP5070FNTR的Datasheet PDF文件第11页浏览型号TSP5070FNTR的Datasheet PDF文件第13页浏览型号TSP5070FNTR的Datasheet PDF文件第14页浏览型号TSP5070FNTR的Datasheet PDF文件第15页浏览型号TSP5070FNTR的Datasheet PDF文件第16页  
TS5070 - TS5071  
Table 8: Byte 2 of Receive Gain Instructions.  
Bit Number  
0dBm0 Test Leve at VFR0  
7
6
5
4
3
2
1
0
In dBm (Into 600  
)
In Vrms (approx.)  
0
0
0
0
0
0
0
0
No Output  
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
– 17.3  
– 17.2  
0.106  
0.107  
1
1
1
1
0
1
1
1
1
1
1
1
0
1
1
1
1
0
1
1
1
0
0
1
1
1
1
1
0
1
0
1
0
0.775  
1.71  
1.86  
1.07  
+ 6.9 (note 1)  
+ 7.6 (note 2)  
+ 8.1 (note 3)  
Notes:  
1. Maximum level into 300; 2. Maximum level into 600;  
3. RL 15K(*) State at power on initialization  
attenuator.  
HYBRID BALANCE FILTER  
The Bi-Quad mode of Hybal1 is most suitable for  
balancinginterfaceswith transformershaving high  
inductance of 1.5 Henries or more. An alternative  
configuration for smaller transformers is available  
by convertingHybal1 to a simplefirst-order section  
witha singlereal lowfrequencypole and0 Hz zero.  
In this mode, the pole/zero frequencymay be pro-  
grammed.  
Many line interfaces can be adequately balanced  
by use of the Hybal1 section only, in which case  
the Hybal2 filter should be de-selected to bypass  
it.  
Hybal2, the higher frequencyfirst-order section, is  
provided for balancing an electronic SLIC, and is  
also helpful with a transformer SLIC in providing  
additional phase correction for mid and high-band  
frequencies, typically 1 kHz to 3.4 kHz. Such a  
correction is particularly useful if the test balance  
impedance includes a capacitor of 100 nF or less,  
such as the loaded and non-loaded loop test net-  
works in the United States. Independent place-  
ment of the pole and zero location is provided.  
The Hybrid Balance Filter on COMBO IIG is a  
programmable filter consisting of a second-order  
Bi-Quad section, Hybal1, followed by a first-order  
section, Hybal2, and a programmable attenuator.  
Either of the filter sections can be bypassed if  
only one is required to achieve good cancellation.  
A selectable 180 degree inverting stage is in-  
cluded to compensate for interface circuits which  
also invert the transmit input relative to the re-  
ceive output signal. The Bi-Quad is intended  
mainly to balance low frequency signals across a  
transformer SLIC, and the first order section to  
balance midrange to higher audio frequency sig-  
nals. The attenuator can be programmed to com-  
pensate for VFRO to VFXI echos in the range  
of -2.5 to – 8.5 dB.  
As a Bi-Quad, Hybal1 has a pair of low frequency  
zeroes and a pair of complex conjugate poles.  
When configuring the Bi-Quad, matching the  
phase of the hybrid at low to midband frequencies  
is most critical. Once the echo path is correctly  
balanced in phase, the magnitude of the cancella-  
tion signal can be corrected by the programmable  
Table 9: Hybrid Balance Register 1 Byte 2 Instruction.  
Bit  
State  
Function  
7
0
Disable Hybrid Balance Circuit Completely.  
No internal cancellation is provided. *  
1
0
Enable Hybrid Balance Cancellation Path  
6
Phase of the internal cancellation signal assumes inverted phase of the echo  
path from VFRO to VFXI.  
1
Phase of the internal cancellation signal assumes no phase inversion in the line  
interface.  
5
0
1
Bypass Hybal 2 Filter Section  
Enable Hybal 2 Filter Section  
G4–G0  
Attenuation Adjustment for the Magnitude of the Cancellation Signal. Range is  
– 2.5 dB (00000) to – 8.5 dB (11000)  
(*) State at power on initialization  
Setting = Please refer to software TS5077 2  
12/32  
 复制成功!