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参数资料
| 型号： | LM96080CIMT-NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO24 |
| 封装： | ROHS COMPLIANT, PLASTIC, TSSOP-24 |
| 文件页数： | 6/30页 |
| 文件大小： | 600K |
| 代理商： | LM96080CIMT-NOPB |
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4.0 ANALOG INPUTS
The 10-bit ADC has a 2.5 mV (2.56/210) LSb , yielding a 0V
to 2.5575V (2.56 - 1 LSb) input range. This is true for all ana-
log inputs. In most monitoring applications, these inputs
would most often be connected to power supplies. The 2.5,
3.3, ±5 and ±12 volt inputs should be attenuated with external
resistors to any desired value within the input range. Care
should be taken not to exceed V+ at any time.
A typical application, such as is shown in Figure 3, might se-
lect the input voltage divider to provide 1.9V at the analog
inputs of the LM96080. This is sufficiently high for good res-
olution of the voltage, yet leaves headroom for upward ex-
cursions from the supply of about 25%. To simplify the
process of resistor selection, set the value of R2 first. Select
a value for R2 or R4 between 10 k
Ω and 100 kΩ. This is low
enough to avoid errors due to input leakage currents yet high
enough to protect both the inputs under overdrive conditions
as well as minimize loading of the source. Then select R1 or
R3 to provide a 1.9V input as show in Figure 3.
30070111
FIGURE 3. Input Examples. Resistor values shown in
table provide approximately 1.9V at the analog inputs.
TABLE 2: V
IN = 1.9V for Different R Values
Voltage
Measure-
ments
(V
S)
R1 or R3
R2 or R4
Voltage
at
Analog Inputs
( ADC code 760)
+2.5V
23.7 k
Ω
75 k
Ω
+1.9V
+3.3V
22.1 k
Ω
30 k
Ω
+1.9V
+5.0V
24 k
Ω
14.7 k
Ω
+1.9V
+12V
160 k
Ω
30.1 k
Ω
+1.9V
12V
160 k
Ω
35.7 k
Ω
+1.9V
5V
36 k
Ω
16.2 k
Ω
+1.9V
For positive input voltages, the equation for calculating R1 is
as follows:
R1 = [ (V
S VIN) / VIN] R2
For negative input voltages, the equation for calculating R3 is
as follows:
R3 = [ (V
S VIN) / (VIN 5V)] R4
External resistors should be included to limit input currents to
the values given in the ABSOLUTE MAXIMUM RATINGS for
Input Current At Any Pin. Inputs with the attenuator networks
will usually meet these requirements. If it is possible for inputs
without attenuators to be turned on while LM96080 is pow-
ered off, additional resistors of about 10 k
Ω should be added
in series with the inputs to limit the input current.
5.0 SUPPLY CURRENT (I+)
The measured supply current (I+) in the Electrical Character-
istics are only for the round robin conversion and the shut-
down mode at a certain supply voltage. To calculate the
supply current I+ in the round robin mode at different supply
voltages, use the equation below.
30070139
FIGURE 4. I+ Calculation
The I+
TEMP, I
+
VOLTAGE, and I
+
SHUTDOWN values can be obtained
from the plots shown in the Typicals Performance Character-
istics section.
www.national.com
14
LM96080
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM96080CIMT-NOPB1 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:System Hardware Monitor with 2-Wire Serial Interface |
| LM96080CIMTX/NOPB | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| LM96080CIMTX-NOPB2 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:System Hardware Monitor with 2-Wire Serial Interface |
| LM96080EB/NOPB | 制造商:Texas Instruments 功能描述:SYSTEM HARDWARE MONITOR WITH 2-WIRE SERI - Boxed Product (Development Kits) 制造商:Texas Instruments 功能描述:BOARD EVAL FOR LM96080 制造商:Texas Instruments 功能描述:LM96080 EVAL BRD |
| LM96-1/2-LENS-KIT | 制造商:NSC 制造商全称:National Semiconductor 功能描述:LM9648 Color CMOS Image Sensor SXGA 18 FPS |
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