参数资料
型号: 73M1822-KEYCHN
厂商: Maxim Integrated Products
文件页数: 26/82页
文件大小: 0K
描述: BOARD KEYCHAIN 73M1822 42-QFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
主要目的: *
嵌入式: *
已用 IC / 零件: *
主要属性: *
次要属性: *
已供物品: 板,CD
73M1822/73M1922 Data Sheet
DS_1x22_017
32
Rev. 1.6
4.4
Isolation Barrier Pulse Transformer
The isolation element used by the 73M1x22 is a standard digital pulse transformer. Several vendors supply
compatible transformers with up to 6000 V ratings. Since the transformer is the only component crossing
the isolation barrier other than EMI capacitors that may be required, it solely determines the isolation
between the PSTN and the 73M1922 digital interface. This method of isolation is significantly superior to
other isolation techniques with major advantages in high common mode voltage operation, lower radiated
noise (EMI) and improved operation in noisy environments. Table 28 lists some pulse transformers
compatible with the 73M1x22. The table also includes lower-voltage transformers that offer low-cost
alternatives if such voltages are sufficient.
Table 28: Compatible Pulse Transformer Sources
Company
Number
Sumida
ESMIT 4180
Wurth Electronics Midcom Inc.
750110001
UMEC
TG-UTB01543S
Datatronics
PT79280
AAsupreme
P95003
Table 29 lists some of the typical transformer specifications used by the 731x22. Contact the manufacturer
directly for product information.
Table 29: Transformer Characteristics
Parameter
Test Condition
Min
Nom
Max
Tolerance
Unit
Inductance
100 kHz, 10 mVAC, 1-2, Ls.
54
60
200
μH
Interwinding
Capacitance
6
pF
Turn Ratio
1:1
±2 %
N/A
DC Resistance
Primary
0.25
Ω
Secondary
0.25
Ω
Dielectric Breakdown
Voltage
1 sec
2000
3750
Vrms
ET Constant
1.2
V
μs
Surge Test
1.2 x 50
μs
2800
6000
Vpeak
Operating Temperature
-40
85
°C
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