参数资料
型号: MAX328EWE+T
厂商: Maxim Integrated Products
文件页数: 9/10页
文件大小: 0K
描述: IC MULTIPLEXER 8X1 16SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1,000
功能: 多路复用器
电路: 1 x 8:1
导通状态电阻: 3.5 千欧
电压电源: 单/双电源
电压 - 电源,单路/双路(±): 10 V ~ 30 V,±5 V ~ 18 V
电流 - 电源: 4.5µA
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.295",7.50mm 宽)
供应商设备封装: 16-SOIC W
包装: 带卷 (TR)
MAX328/MAX329
Ultra-Low Leakage Monolithic CMOS
Analog Multiplexers
8
_______________________________________________________________________________________
Applications Information
Figure 4 is a typical circuit for converting the
MAX328/MAX329 into a fault-tolerant mux. In this
application, the internal diodes limit the voltage at the
MAX328 input to ±15.7V (±15V supplies). No external
diodes need to be added with the MAX328/MAX329,
unlike conventional multiplexers requiring external
diodes.
The resistors, R, need to be 39k
or higher to limit the
power dissipation in the resistor when a 120V AC fault
occurs (i.e., power dissipation is (120-16)2/39k
or
0.28W. This is why a 1/2/W resistor is needed). The circuit
withstands an indefinite fault to a 120V AC line with no
damage to any component.
In addition to allowing fault-protection, the guaranteed
low leakage of the MAX328/MAX329 also reduces signal
errors. The circuit in Figure 4 produces an error voltage of
10pA (max leakage) x 39k
or 0.39V at room tempera-
ture and 39V at +125°C. Therefore, for 10V signals, the
MAX328/MAX329 allows 17-bit resolution (38V = 1LSB)
over the full temperature range.
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
A0
A1
A2
MAX328
EN
D
S4
S3
S2
S1
1
F
-15V
R
S5
S6
S7
S8
1
F
+15V
R = 39k
1/2W
Figure 4. Fault-Tolerant Mux (indefinitely withstands 120V AC
fault voltages)
16
EN
15
A0
14
A1
13
A2
10
S5
11
V+
12
GND
9S6
2
S1
1
V-
3
S2
4
S3
5
S4
6
D
7
S8
8
S7
MAX328
LOGIC
16
EN
15
A0
14
A1
13
GND
10
S2B
11
S1B
12
V+
9
S3B
2
S1A
1
V-
3
S2A
4
S3A
5
S4A
6
DA
7
DB
8
S4B
MAX329
LOGIC
TOP VIEW
Functional Diagrams
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