參數(shù)資料
型號: 73M1866B-IFX
廠商: Maxim Integrated Products
文件頁數(shù): 65/88頁
文件大?。?/td> 0K
描述: KIT EVALUATION FOR 73M1866B
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 1
73M1866B/73M1966B Data Sheet
DS_1x66B_001
68
Rev. 1.6
10.5 Trans-Hybrid Cancellation
In order to improve performance, the Trans-hybrid Cancellation option allows a replica of the transmit
signal to be created within the 73M1x66B and fed back to the RXM pin via an external circuit at the line
interface. With a well matched AC impedance the amount of cancellation achieved is >26 dB. This
function can be enabled or disabled.
RXM
RXP
TXM
Tx Buf
Vin
-
Vin+
Rp
Rn
52.3 kΩ
17.4 kΩ
21 kΩ
4.7 uF
+
-
Rx Buf
From the Line
Figure 38: Trans-hybrid Cancellation
10.6 Direct Access Arrangement Control Functions
These Transmit Control Registers contain control information to set up the line side of the 73M1x66B.
Included are DC-IV characteristics, off-hook control, etc.
Table 38: DAA Control Functions
Function
Mnemonic
Register
Location
Type
Description
ACZ
0x16[3:0]
W
Active Termination Loop
Controls the selection of the active termination loops per the table
shown below. ATEN must be set to 1 for selection to be enabled.
ACZ Field
Active Termination Loop Setting
0000
600
0001
900
0010
270
+ 750 || 150 nF and 275 +
780
|| 150 nF (ETSI ES 203 021-2)
0011
220
+ 820 || 120 nF and 220 +
820
|| 115 nF (Australia)
0100
370
+ 620 || 310 nF
0101
320
+ 1050 || 230 nF
0110
370
+ 820 || 110 nF
0111
275
+ 780 || 115 nF
1000
120
+ 820 || 110 nF
1001
350
+ 1000 || 210 nF
1010
200
+ 680 || 100 nF (China)
1011
600
+ 2.16 F
1100
900
+ 1 F
1101
900
+ 2.16 F
1110
220
+ 400 || 70 nF (China)
1111
270
+ 600 || 150 nF (Global
Impedance)
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