参数资料
| 型号： | ADM12914-2ARQZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR QUAD UV/OV 16QSOP |
| 产品培训模块： | Voltage Supervisor 101 |
| 标准包装： | 98 |
| 类型： | 多压监控器 |
| 监视电压数目： | 4 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
Data Sheet
THEORY OF OPERATION
VOLTAGE SUPERVISION
The ADM12914 supervises up to four voltage rails for under-
voltage and overvoltage conditions. Two pins, VHx and VLx,
are assigned to monitor each rail, one for overvoltage detection
and the other for undervoltage detection. Each pin is connected
to the input of an internal voltage comparator, and its voltage
level is internally compared with a 0.5 V voltage reference with
very high threshold accuracy of ±0.8%. The device is specified over
the extended operating temperature range from ?40°C to +125°C.
The output of each of the internal undervoltage comparators is
tied to a common UV output pin. Likewise, the outputs of the
internal overvoltage comparators are tied to a common OV
output pin.
ADM12914
POLARITY CONFIGURATION
The ADM12914 is capable of monitoring supply voltages of
both positive and negative polarities. The SEL pin is a three-
state pin that determines the polarity of Input 3 and Input 4. As
summarized in Table 5, the SEL pin is connected to either GND
or V CC , or is not connected.
When an input is configured to monitor a positive voltage, using
the three resistor scheme that is shown in Figure 17, VHx is
connected to the high-side tap of the resistor divider and VLx
is connected to the low-side tap of the resistor divider.
Conversely, when an input is configured to monitor a negative
voltage, UVx and OVx are swapped internally. The negative
PSU
5V
3.3V
2.5V
1.8V
VHx remains connected to the high-side tap and VLx remains
connected to the low-side tap. Within this configuration, an
undervoltage condition occurs when the monitored voltage is less
negative than the programmed threshold, and an overvoltage
VH1
VL1
VH2
V CC
SEL
TIMER
SYSTEM
condition occurs when the monitored voltage is more negative
than the programmed threshold.
ADM12914
VL2
VH3
VL3
VH4
VL4
REF
UV
OV
LATCH/DIS
GND
Figure 16. Typical Applications Diagram
Table 5. Polarity Configuration
Input 3
Input 4
SEL Pin
Connected to V CC
Left Unconnected
Connected to GND
Polarity
Positive
Positive
Negative
UV Condition
VH3 < 0.5 V
VH3 < 0.5 V
VL3 > 0.5 V
OV Condition
VL3 > 0.5 V
VL3 > 0.5 V
VH3 < 0.5 V
Polarity
Positive
Negative
Negative
UV Condition
VH4 < 0.5 V
VL4 > 0.5 V
VL4 > 0.5 V
OV Condition
VL4 > 0.5 V
VH4 < 0.5 V
VH4 < 0.5 V
Rev. D | Page 9 of 16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM12914-2ARQZ-RL7 | 制造商:Analog Devices 功能描述: |
| ADM1293-1AACPZ | 功能描述:IC MONITOR QUAD UV/OV 16LFCSP 制造商:analog devices inc. 系列:- 包装:托盘 零件状态:有效 输入阻抗:- 测量误差:- 电压 - I/O 高:1.1V 电压 - I/O 低:0.4V，0.8V，1.5V 电流 - 电源:3.6mA 电压 - 电源:2.95 V ~ 20 V 表计类型:单相 工作温度:-40°C ~ 105°C 安装类型:表面贴装 封装/外壳:16-WQFN 裸露焊盘 供应商器件封装:16-LFCSP-WQ（4x4） 标准包装:1 |
| ADM1293-1AACPZ-RL7 | 功能描述:IC MONITOR QUAD UV/OV 16LFCSP 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:有效 输入阻抗:- 测量误差:- 电压 - I/O 高:1.1V 电压 - I/O 低:0.4V，0.8V，1.5V 电流 - 电源:3.6mA 电压 - 电源:2.95 V ~ 20 V 表计类型:单相 工作温度:-40°C ~ 105°C 安装类型:表面贴装 封装/外壳:16-WQFN 裸露焊盘 供应商器件封装:16-LFCSP-WQ（4x4） 标准包装:1,500 |
| ADM1293-1AARUZ | 功能描述:IC MONITOR QUAD UV/OV 14TSSOP 制造商:analog devices inc. 系列:- 包装:管件 零件状态:有效 输入阻抗:- 测量误差:- 电压 - I/O 高:1.1V 电压 - I/O 低:0.4V，0.8V，1.5V 电流 - 电源:3.6mA 电压 - 电源:2.95 V ~ 20 V 表计类型:单相 工作温度:-40°C ~ 105°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商器件封装:14-TSSOP 标准包装:96 |
| ADM1293-1AARUZ-RL7 | 功能描述:IC MONITOR QUAD UV/OV 14TSSOP 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:有效 输入阻抗:- 测量误差:- 电压 - I/O 高:1.1V 电压 - I/O 低:0.4V，0.8V，1.5V 电流 - 电源:3.6mA 电压 - 电源:2.95 V ~ 20 V 表计类型:单相 工作温度:-40°C ~ 105°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商器件封装:14-TSSOP 标准包装:1,000 |
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