参数资料
| 型号： | MAX378EPE |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC MULTIPLEXER 8X1 16DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 25 |
| 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： | 双电源 |
| 电压 - 电源，单路/双路(±)： | ±4.5 V ~ 18 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 16-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 16-PDIP |
| 包装： | 管件 |
MAX378/MAX379
High-Voltage, Fault-Protected
Analog Multiplexers
6
_______________________________________________________________________________________
_______________Typical Applications
Figure 6 shows a typical data acquisition system
using the MAX378 multiplexer. Since the multiplexer
is driving a high-impedance input, its error is a func-
tion of its own resistance (RDS(ON)) times the multi-
plexer leakage current (IOUT(ON)) and the amplifier
bias current (IBIAS):
VERR = RDS(ON) x (IOUT(ON) + IBIAS (MAX420))
= 2.0k
x (2nA + 30pA)
= 18.0V maximum error
In most cases, this error is low enough that preamplifi-
cation of input signals is not needed, even with very
low-level signals such as 40V/°C from type J thermo-
couples.
In systems with fewer than eight inputs, an unused chan-
nel can be connected to the system ground reference
point for software zero correction. A second channel
connected to the system voltage reference allows gain
correction of the entire data acquisition system as well.
A MAX420 precision op amp is connected as a pro-
grammable-gain amplifier, with gains ranging from 1 to
10,000. The guaranteed 5V unadjusted offset of the
MAX420 maintains high signal accuracy, while program-
mable gain allows the output signal level to be scaled to
the optimum range for the remainder of the data acqui-
sition system, normally a Sample/Hold and A/D. Since
the gain-changing multiplexer is not connected to the
external sensors, it can be either a DG508A multiplexer
or the fault-protected MAX358 or MAX378.
Truth Table—MAX378
A2
A1
A0
EN
ON
SWITCH
X
0
1
X
0
1
0
1
X
0
1
0
1
0
1
0
1
0
1
NONE
1
2
3
4
5
6
7
8
Truth Table—MAX379
A1
A0
EN
ON
SWITCH
X
0
1
X
0
1
0
1
0
1
NONE
1
2
3
4
Note: Logic “0” = VAL
≤ 0.8V, Logic “1” = VAH ≥ 2.4V
MAX420
+15V
-15V
V+
+15V
1M
100k
10k
OUT
1k
111
IN1
IN2
IN3
IN4
IN5
V+
THERMOCOUPLE
+15V
-15V
V-
GND
DG508A
MAX358
OR
MAX378
IN2
STRAIN GUAGE
IN7
+10V
GAIN REFERENCE
IN8
ZERO REFERENCE
IN3
4-20mA LOOP
TRANSMITTER
IN4
IN5
IN6
-15V
V-
GND
Figure 6. Typical Data Acquisition Front End
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX378EPE+ | 功能描述:多路器开关 IC 8:1 Fault-Protected Analog MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX378EWG | 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX378EWG+ | 功能描述:多路器开关 IC 8:1 Fault-Protected Analog MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX378EWG+T | 功能描述:多路器开关 IC 8:1 Fault-Protected Analog MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX378EWG-T | 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
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